./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-inc.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_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/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_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/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_da1dc239-48e5-4da1-890a-d58ac60de885/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 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:25:24,087 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:25:24,207 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 22:25:24,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:25:24,221 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:25:24,261 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:25:24,262 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:25:24,263 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:25:24,264 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:25:24,269 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:25:24,270 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:25:24,270 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:25:24,270 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:25:24,272 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:25:24,273 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:25:24,273 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:25:24,274 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:25:24,274 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:25:24,275 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:25:24,275 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:25:24,275 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:25:24,276 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:25:24,276 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 22:25:24,277 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:25:24,277 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:25:24,278 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:25:24,278 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:25:24,279 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:25:24,280 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:25:24,280 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:25:24,281 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:24,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:25:24,282 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:25:24,282 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:25:24,283 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:25:24,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:25:24,283 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:25:24,283 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:25:24,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:25:24,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:25:24,284 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:25:24,284 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_da1dc239-48e5-4da1-890a-d58ac60de885/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 [2023-11-06 22:25:24,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:25:24,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:25:24,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:25:24,639 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:25:24,640 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:25:24,641 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2023-11-06 22:25:27,827 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:25:28,065 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:25:28,066 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2023-11-06 22:25:28,081 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/data/aa420fb94/5a7c23c1e6504dc3a8c9ee872aa52450/FLAGe3abb63d1 [2023-11-06 22:25:28,102 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/data/aa420fb94/5a7c23c1e6504dc3a8c9ee872aa52450 [2023-11-06 22:25:28,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:25:28,110 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:25:28,114 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:28,114 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:25:28,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:25:28,121 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,122 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7094538d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28, skipping insertion in model container [2023-11-06 22:25:28,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,160 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:25:28,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:28,371 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:25:28,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:28,415 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:25:28,415 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:25:28,426 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:25:28,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28 WrapperNode [2023-11-06 22:25:28,427 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:28,428 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:28,428 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:25:28,429 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:25:28,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,468 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,495 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 148 [2023-11-06 22:25:28,496 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:28,497 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:25:28,497 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:25:28,497 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:25:28,509 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,513 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,525 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,549 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,553 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,564 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,567 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:25:28,568 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:25:28,569 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:25:28,569 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:25:28,570 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28" (1/1) ... [2023-11-06 22:25:28,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:28,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:28,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:25:28,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:25:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:25:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:25:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:25:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:25:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:25:28,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:25:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:25:28,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:25:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:25:28,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:25:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:25:28,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:25:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:25:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:25:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:25:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:25:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:25:28,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:25:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:25:28,666 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 22:25:28,784 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:25:28,786 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:25:29,242 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:25:29,402 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:25:29,403 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:25:29,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:29 BoogieIcfgContainer [2023-11-06 22:25:29,406 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:25:29,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:25:29,412 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:25:29,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:25:29,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:25:28" (1/3) ... [2023-11-06 22:25:29,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da96c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:29, skipping insertion in model container [2023-11-06 22:25:29,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:28" (2/3) ... [2023-11-06 22:25:29,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da96c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:29, skipping insertion in model container [2023-11-06 22:25:29,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:29" (3/3) ... [2023-11-06 22:25:29,425 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2023-11-06 22:25:29,435 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:25:29,447 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:25:29,447 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-06 22:25:29,447 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:25:29,570 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:25:29,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 196 transitions, 420 flow [2023-11-06 22:25:29,716 INFO L124 PetriNetUnfolderBase]: 12/192 cut-off events. [2023-11-06 22:25:29,716 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:25:29,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 192 events. 12/192 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 227 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 154. Up to 2 conditions per place. [2023-11-06 22:25:29,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 196 transitions, 420 flow [2023-11-06 22:25:29,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 166 transitions, 353 flow [2023-11-06 22:25:29,745 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:29,764 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 166 transitions, 353 flow [2023-11-06 22:25:29,767 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 166 transitions, 353 flow [2023-11-06 22:25:29,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 166 transitions, 353 flow [2023-11-06 22:25:29,813 INFO L124 PetriNetUnfolderBase]: 11/166 cut-off events. [2023-11-06 22:25:29,813 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:25:29,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 166 events. 11/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 225 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 154. Up to 2 conditions per place. [2023-11-06 22:25:29,820 INFO L119 LiptonReduction]: Number of co-enabled transitions 4200 [2023-11-06 22:25:38,573 INFO L134 LiptonReduction]: Checked pairs total: 6366 [2023-11-06 22:25:38,573 INFO L136 LiptonReduction]: Total number of compositions: 163 [2023-11-06 22:25:38,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:38,603 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;@2a9f6fc6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:38,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-06 22:25:38,606 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:38,607 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:25:38,607 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:38,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:38,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:25:38,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:25:38,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:38,619 INFO L85 PathProgramCache]: Analyzing trace with hash 25988, now seen corresponding path program 1 times [2023-11-06 22:25:38,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:38,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294628143] [2023-11-06 22:25:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:38,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:39,009 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 22:25:39,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:39,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294628143] [2023-11-06 22:25:39,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294628143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:39,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:39,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:25:39,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131658838] [2023-11-06 22:25:39,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:39,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:39,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:39,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 359 [2023-11-06 22:25:39,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 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 22:25:39,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:39,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 359 [2023-11-06 22:25:39,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:40,643 INFO L124 PetriNetUnfolderBase]: 7435/9510 cut-off events. [2023-11-06 22:25:40,644 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2023-11-06 22:25:40,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19661 conditions, 9510 events. 7435/9510 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 44229 event pairs, 5195 based on Foata normal form. 0/4482 useless extension candidates. Maximal degree in co-relation 17376. Up to 9498 conditions per place. [2023-11-06 22:25:40,741 INFO L140 encePairwiseOnDemand]: 352/359 looper letters, 37 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2023-11-06 22:25:40,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 41 transitions, 183 flow [2023-11-06 22:25:40,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:40,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-11-06 22:25:40,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976787372330548 [2023-11-06 22:25:40,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-11-06 22:25:40,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-11-06 22:25:40,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:40,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-11-06 22:25:40,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:40,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:25:40,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:25:40,791 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 103 flow. Second operand 3 states and 536 transitions. [2023-11-06 22:25:40,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 41 transitions, 183 flow [2023-11-06 22:25:40,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 170 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-06 22:25:40,814 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 107 flow [2023-11-06 22:25:40,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-11-06 22:25:40,822 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-11-06 22:25:40,823 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 107 flow [2023-11-06 22:25:40,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 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 22:25:40,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:40,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:25:40,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:25:40,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:25:40,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:40,828 INFO L85 PathProgramCache]: Analyzing trace with hash 806765, now seen corresponding path program 1 times [2023-11-06 22:25:40,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:40,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331482947] [2023-11-06 22:25:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:40,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:40,993 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 22:25:40,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:40,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331482947] [2023-11-06 22:25:40,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331482947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:25:40,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586168037] [2023-11-06 22:25:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:40,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:40,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:40,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:41,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:25:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:41,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:25:41,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:41,220 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 22:25:41,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:41,239 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 22:25:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586168037] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:25:41,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:25:41,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:25:41,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159588813] [2023-11-06 22:25:41,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:41,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:25:41,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:41,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:25:41,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:25:41,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 359 [2023-11-06 22:25:41,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 107 flow. Second operand has 7 states, 7 states have (on average 165.14285714285714) internal successors, (1156), 7 states have internal predecessors, (1156), 0 states have call successors, (0), 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 22:25:41,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:41,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 359 [2023-11-06 22:25:41,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:42,736 INFO L124 PetriNetUnfolderBase]: 7441/9519 cut-off events. [2023-11-06 22:25:42,736 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:42,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19523 conditions, 9519 events. 7441/9519 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 44056 event pairs, 5195 based on Foata normal form. 0/4485 useless extension candidates. Maximal degree in co-relation 19469. Up to 9500 conditions per place. [2023-11-06 22:25:42,819 INFO L140 encePairwiseOnDemand]: 354/359 looper letters, 36 selfloop transitions, 13 changer transitions 0/50 dead transitions. [2023-11-06 22:25:42,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 241 flow [2023-11-06 22:25:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:25:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:25:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1200 transitions. [2023-11-06 22:25:42,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477516912057302 [2023-11-06 22:25:42,832 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1200 transitions. [2023-11-06 22:25:42,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1200 transitions. [2023-11-06 22:25:42,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:42,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1200 transitions. [2023-11-06 22:25:42,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 171.42857142857142) internal successors, (1200), 7 states have internal predecessors, (1200), 0 states have call successors, (0), 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 22:25:42,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 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 22:25:42,847 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 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 22:25:42,847 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 107 flow. Second operand 7 states and 1200 transitions. [2023-11-06 22:25:42,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 241 flow [2023-11-06 22:25:42,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 236 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:25:42,853 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 186 flow [2023-11-06 22:25:42,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-11-06 22:25:42,855 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-11-06 22:25:42,855 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 186 flow [2023-11-06 22:25:42,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.14285714285714) internal successors, (1156), 7 states have internal predecessors, (1156), 0 states have call successors, (0), 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 22:25:42,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:42,857 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-06 22:25:42,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:43,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:43,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:25:43,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:43,063 INFO L85 PathProgramCache]: Analyzing trace with hash 25010500, now seen corresponding path program 1 times [2023-11-06 22:25:43,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:43,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780293880] [2023-11-06 22:25:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:43,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:43,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:43,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780293880] [2023-11-06 22:25:43,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780293880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:43,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:43,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:25:43,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303594407] [2023-11-06 22:25:43,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:43,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:25:43,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:43,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:25:43,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:25:43,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 359 [2023-11-06 22:25:43,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 164.8) internal successors, (824), 5 states have internal predecessors, (824), 0 states have call successors, (0), 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 22:25:43,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:43,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 359 [2023-11-06 22:25:43,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:44,693 INFO L124 PetriNetUnfolderBase]: 7438/9515 cut-off events. [2023-11-06 22:25:44,693 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:25:44,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19531 conditions, 9515 events. 7438/9515 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 43982 event pairs, 5195 based on Foata normal form. 0/4489 useless extension candidates. Maximal degree in co-relation 19495. Up to 9497 conditions per place. [2023-11-06 22:25:44,784 INFO L140 encePairwiseOnDemand]: 355/359 looper letters, 37 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2023-11-06 22:25:44,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 249 flow [2023-11-06 22:25:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:25:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:25:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 863 transitions. [2023-11-06 22:25:44,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807799442896936 [2023-11-06 22:25:44,789 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 863 transitions. [2023-11-06 22:25:44,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 863 transitions. [2023-11-06 22:25:44,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:44,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 863 transitions. [2023-11-06 22:25:44,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.6) internal successors, (863), 5 states have internal predecessors, (863), 0 states have call successors, (0), 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 22:25:44,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 359.0) internal successors, (2154), 6 states have internal predecessors, (2154), 0 states have call successors, (0), 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 22:25:44,802 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 359.0) internal successors, (2154), 6 states have internal predecessors, (2154), 0 states have call successors, (0), 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 22:25:44,802 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 186 flow. Second operand 5 states and 863 transitions. [2023-11-06 22:25:44,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 249 flow [2023-11-06 22:25:44,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 228 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 22:25:44,806 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 154 flow [2023-11-06 22:25:44,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-06 22:25:44,807 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-11-06 22:25:44,808 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 154 flow [2023-11-06 22:25:44,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.8) internal successors, (824), 5 states have internal predecessors, (824), 0 states have call successors, (0), 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 22:25:44,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:44,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:25:44,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:25:44,809 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:25:44,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:44,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1738549885, now seen corresponding path program 1 times [2023-11-06 22:25:44,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:44,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775021832] [2023-11-06 22:25:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:44,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:44,874 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 22:25:44,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:44,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775021832] [2023-11-06 22:25:44,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775021832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:44,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:44,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:44,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385670731] [2023-11-06 22:25:44,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:44,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:44,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:44,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:44,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:44,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 359 [2023-11-06 22:25:44,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 22:25:44,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:44,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 359 [2023-11-06 22:25:44,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:46,367 INFO L124 PetriNetUnfolderBase]: 8882/11261 cut-off events. [2023-11-06 22:25:46,367 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-06 22:25:46,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23105 conditions, 11261 events. 8882/11261 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 52942 event pairs, 5203 based on Foata normal form. 0/5311 useless extension candidates. Maximal degree in co-relation 23071. Up to 9836 conditions per place. [2023-11-06 22:25:46,443 INFO L140 encePairwiseOnDemand]: 354/359 looper letters, 64 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-11-06 22:25:46,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 68 transitions, 336 flow [2023-11-06 22:25:46,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-11-06 22:25:46,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190343546889508 [2023-11-06 22:25:46,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-11-06 22:25:46,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-11-06 22:25:46,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:46,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-11-06 22:25:46,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 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 22:25:46,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:25:46,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:25:46,453 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 154 flow. Second operand 3 states and 559 transitions. [2023-11-06 22:25:46,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 68 transitions, 336 flow [2023-11-06 22:25:46,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 68 transitions, 324 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:25:46,462 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 163 flow [2023-11-06 22:25:46,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-11-06 22:25:46,464 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-11-06 22:25:46,464 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 163 flow [2023-11-06 22:25:46,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 22:25:46,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:46,465 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:25:46,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:25:46,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:25:46,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:46,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1734677233, now seen corresponding path program 2 times [2023-11-06 22:25:46,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:46,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581750159] [2023-11-06 22:25:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:46,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:46,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:46,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581750159] [2023-11-06 22:25:46,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581750159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:25:46,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479692051] [2023-11-06 22:25:46,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:25:46,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:46,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:46,633 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:46,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:25:46,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:25:46,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:25:46,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:25:46,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:25:46,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:25:46,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479692051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:46,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:25:46,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-06 22:25:46,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227133908] [2023-11-06 22:25:46,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:46,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:46,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:46,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:46,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:25:46,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 359 [2023-11-06 22:25:46,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 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 22:25:46,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:46,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 359 [2023-11-06 22:25:46,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:48,334 INFO L124 PetriNetUnfolderBase]: 8866/11244 cut-off events. [2023-11-06 22:25:48,335 INFO L125 PetriNetUnfolderBase]: For 1498/1498 co-relation queries the response was YES. [2023-11-06 22:25:48,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25759 conditions, 11244 events. 8866/11244 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 51924 event pairs, 6025 based on Foata normal form. 1/5304 useless extension candidates. Maximal degree in co-relation 25732. Up to 11229 conditions per place. [2023-11-06 22:25:48,428 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 40 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-11-06 22:25:48,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 245 flow [2023-11-06 22:25:48,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:48,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-11-06 22:25:48,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49675023212627667 [2023-11-06 22:25:48,433 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-11-06 22:25:48,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-11-06 22:25:48,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:48,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-11-06 22:25:48,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 22:25:48,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:25:48,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:25:48,441 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 163 flow. Second operand 3 states and 535 transitions. [2023-11-06 22:25:48,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 245 flow [2023-11-06 22:25:48,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 224 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-06 22:25:48,445 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 144 flow [2023-11-06 22:25:48,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-11-06 22:25:48,448 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-11-06 22:25:48,449 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 144 flow [2023-11-06 22:25:48,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 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 22:25:48,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:48,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:48,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:48,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:48,655 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:25:48,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:48,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1939529232, now seen corresponding path program 1 times [2023-11-06 22:25:48,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:48,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378352100] [2023-11-06 22:25:48,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:48,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:48,736 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 22:25:48,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:48,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378352100] [2023-11-06 22:25:48,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378352100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:25:48,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676454237] [2023-11-06 22:25:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:48,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:48,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:48,739 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:48,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:25:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:48,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:25:48,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:25:48,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:25:48,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676454237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:48,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:25:48,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-06 22:25:48,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708534998] [2023-11-06 22:25:48,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:48,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:48,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:25:48,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 359 [2023-11-06 22:25:48,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 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 22:25:48,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:48,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 359 [2023-11-06 22:25:48,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:50,235 INFO L124 PetriNetUnfolderBase]: 8865/11243 cut-off events. [2023-11-06 22:25:50,235 INFO L125 PetriNetUnfolderBase]: For 897/897 co-relation queries the response was YES. [2023-11-06 22:25:50,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24847 conditions, 11243 events. 8865/11243 cut-off events. For 897/897 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 51938 event pairs, 6025 based on Foata normal form. 1/5603 useless extension candidates. Maximal degree in co-relation 24810. Up to 11233 conditions per place. [2023-11-06 22:25:50,306 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 43 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-06 22:25:50,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 228 flow [2023-11-06 22:25:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-11-06 22:25:50,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489322191272052 [2023-11-06 22:25:50,309 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-11-06 22:25:50,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-11-06 22:25:50,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:50,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-11-06 22:25:50,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 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 22:25:50,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:25:50,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:25:50,319 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 144 flow. Second operand 3 states and 527 transitions. [2023-11-06 22:25:50,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 228 flow [2023-11-06 22:25:50,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:25:50,324 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 132 flow [2023-11-06 22:25:50,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-06 22:25:50,327 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-11-06 22:25:50,328 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 132 flow [2023-11-06 22:25:50,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 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 22:25:50,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:50,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:50,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:50,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:50,537 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:25:50,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash -697536782, now seen corresponding path program 1 times [2023-11-06 22:25:50,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:50,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138583649] [2023-11-06 22:25:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:50,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:25:50,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:50,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138583649] [2023-11-06 22:25:50,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138583649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:25:50,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099273784] [2023-11-06 22:25:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:50,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:50,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:50,626 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:50,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:25:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:50,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:25:50,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:50,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:50,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099273784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:25:50,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:25:50,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 12 [2023-11-06 22:25:50,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632391283] [2023-11-06 22:25:50,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:50,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:25:50,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:50,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:25:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:25:51,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 359 [2023-11-06 22:25:51,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 132 flow. Second operand has 13 states, 13 states have (on average 155.69230769230768) internal successors, (2024), 13 states have internal predecessors, (2024), 0 states have call successors, (0), 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 22:25:51,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:51,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 359 [2023-11-06 22:25:51,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:53,489 INFO L124 PetriNetUnfolderBase]: 15215/19304 cut-off events. [2023-11-06 22:25:53,489 INFO L125 PetriNetUnfolderBase]: For 809/809 co-relation queries the response was YES. [2023-11-06 22:25:53,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42888 conditions, 19304 events. 15215/19304 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 1034. Compared 97008 event pairs, 6410 based on Foata normal form. 0/10095 useless extension candidates. Maximal degree in co-relation 42876. Up to 8125 conditions per place. [2023-11-06 22:25:53,601 INFO L140 encePairwiseOnDemand]: 349/359 looper letters, 140 selfloop transitions, 14 changer transitions 0/155 dead transitions. [2023-11-06 22:25:53,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 155 transitions, 694 flow [2023-11-06 22:25:53,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:25:53,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:25:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1546 transitions. [2023-11-06 22:25:53,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4784896316929743 [2023-11-06 22:25:53,611 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1546 transitions. [2023-11-06 22:25:53,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1546 transitions. [2023-11-06 22:25:53,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:53,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1546 transitions. [2023-11-06 22:25:53,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.77777777777777) internal successors, (1546), 9 states have internal predecessors, (1546), 0 states have call successors, (0), 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 22:25:53,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 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 22:25:53,627 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 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 22:25:53,627 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 132 flow. Second operand 9 states and 1546 transitions. [2023-11-06 22:25:53,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 155 transitions, 694 flow [2023-11-06 22:25:53,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 155 transitions, 690 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:25:53,636 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 228 flow [2023-11-06 22:25:53,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=228, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2023-11-06 22:25:53,638 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2023-11-06 22:25:53,639 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 228 flow [2023-11-06 22:25:53,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.69230769230768) internal successors, (2024), 13 states have internal predecessors, (2024), 0 states have call successors, (0), 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 22:25:53,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:53,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:53,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:53,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:53,852 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:25:53,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:53,853 INFO L85 PathProgramCache]: Analyzing trace with hash -338537756, now seen corresponding path program 1 times [2023-11-06 22:25:53,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:53,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80194581] [2023-11-06 22:25:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:53,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:25:53,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:53,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80194581] [2023-11-06 22:25:53,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80194581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:53,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:53,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:53,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9423839] [2023-11-06 22:25:53,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:53,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:53,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:53,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:53,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:53,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 359 [2023-11-06 22:25:53,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 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 22:25:53,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:53,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 359 [2023-11-06 22:25:53,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:55,658 INFO L124 PetriNetUnfolderBase]: 13807/17594 cut-off events. [2023-11-06 22:25:55,658 INFO L125 PetriNetUnfolderBase]: For 10103/10108 co-relation queries the response was YES. [2023-11-06 22:25:55,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47823 conditions, 17594 events. 13807/17594 cut-off events. For 10103/10108 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 88196 event pairs, 4854 based on Foata normal form. 608/11931 useless extension candidates. Maximal degree in co-relation 33961. Up to 9647 conditions per place. [2023-11-06 22:25:55,784 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 63 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2023-11-06 22:25:55,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 71 transitions, 408 flow [2023-11-06 22:25:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:55,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-11-06 22:25:55,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5143918291550603 [2023-11-06 22:25:55,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-11-06 22:25:55,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-11-06 22:25:55,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:55,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-11-06 22:25:55,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 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 22:25:55,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:25:55,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:25:55,796 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 228 flow. Second operand 3 states and 554 transitions. [2023-11-06 22:25:55,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 71 transitions, 408 flow [2023-11-06 22:25:56,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 385 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-06 22:25:56,058 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 203 flow [2023-11-06 22:25:56,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-11-06 22:25:56,060 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2023-11-06 22:25:56,060 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 203 flow [2023-11-06 22:25:56,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 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 22:25:56,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:56,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:56,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:25:56,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:25:56,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:56,062 INFO L85 PathProgramCache]: Analyzing trace with hash 32916268, now seen corresponding path program 1 times [2023-11-06 22:25:56,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:56,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355374473] [2023-11-06 22:25:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:56,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:25:56,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:56,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355374473] [2023-11-06 22:25:56,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355374473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:56,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:56,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:56,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702545418] [2023-11-06 22:25:56,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:56,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:56,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:56,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 359 [2023-11-06 22:25:56,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 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 22:25:56,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:56,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 359 [2023-11-06 22:25:56,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:58,281 INFO L124 PetriNetUnfolderBase]: 16821/21248 cut-off events. [2023-11-06 22:25:58,282 INFO L125 PetriNetUnfolderBase]: For 23529/23529 co-relation queries the response was YES. [2023-11-06 22:25:58,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56985 conditions, 21248 events. 16821/21248 cut-off events. For 23529/23529 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 103392 event pairs, 9266 based on Foata normal form. 386/13882 useless extension candidates. Maximal degree in co-relation 39742. Up to 18197 conditions per place. [2023-11-06 22:25:58,410 INFO L140 encePairwiseOnDemand]: 354/359 looper letters, 76 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-11-06 22:25:58,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 80 transitions, 490 flow [2023-11-06 22:25:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:58,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-11-06 22:25:58,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162488393686165 [2023-11-06 22:25:58,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-11-06 22:25:58,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-11-06 22:25:58,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:58,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-11-06 22:25:58,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 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 22:25:58,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:25:58,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:25:58,422 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 203 flow. Second operand 3 states and 556 transitions. [2023-11-06 22:25:58,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 80 transitions, 490 flow [2023-11-06 22:25:58,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 462 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:25:58,471 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 210 flow [2023-11-06 22:25:58,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-11-06 22:25:58,472 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2023-11-06 22:25:58,472 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 210 flow [2023-11-06 22:25:58,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 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 22:25:58,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:58,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:58,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:25:58,473 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:25:58,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:58,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1025801521, now seen corresponding path program 1 times [2023-11-06 22:25:58,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:58,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457842771] [2023-11-06 22:25:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:58,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:25:58,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:58,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457842771] [2023-11-06 22:25:58,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457842771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:58,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:58,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:58,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112471535] [2023-11-06 22:25:58,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:58,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:58,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:58,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:58,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:58,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 359 [2023-11-06 22:25:58,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 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 22:25:58,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:58,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 359 [2023-11-06 22:25:58,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:01,168 INFO L124 PetriNetUnfolderBase]: 19897/25796 cut-off events. [2023-11-06 22:26:01,169 INFO L125 PetriNetUnfolderBase]: For 24551/24551 co-relation queries the response was YES. [2023-11-06 22:26:01,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73256 conditions, 25796 events. 19897/25796 cut-off events. For 24551/24551 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 120114 event pairs, 11046 based on Foata normal form. 440/18032 useless extension candidates. Maximal degree in co-relation 49372. Up to 19441 conditions per place. [2023-11-06 22:26:01,304 INFO L140 encePairwiseOnDemand]: 354/359 looper letters, 83 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-11-06 22:26:01,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 86 transitions, 522 flow [2023-11-06 22:26:01,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-11-06 22:26:01,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190343546889508 [2023-11-06 22:26:01,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-11-06 22:26:01,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-11-06 22:26:01,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:01,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-11-06 22:26:01,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 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 22:26:01,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:26:01,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:26:01,314 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 210 flow. Second operand 3 states and 559 transitions. [2023-11-06 22:26:01,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 86 transitions, 522 flow [2023-11-06 22:26:01,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 86 transitions, 512 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:26:01,352 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 226 flow [2023-11-06 22:26:01,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-11-06 22:26:01,353 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2023-11-06 22:26:01,353 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 226 flow [2023-11-06 22:26:01,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 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 22:26:01,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:01,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:01,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:26:01,354 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:01,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:01,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1025801469, now seen corresponding path program 1 times [2023-11-06 22:26:01,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:01,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255308672] [2023-11-06 22:26:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:01,935 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 22:26:01,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255308672] [2023-11-06 22:26:01,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255308672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116258180] [2023-11-06 22:26:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:01,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:01,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:01,939 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:01,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:26:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:02,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:26:02,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:02,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:02,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:02,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:02,137 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:26:02,195 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:26:02,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:02,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:02,335 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:02,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:02,404 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 22:26:02,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:02,535 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_256 (Array Int Int)) (v_ArrVal_257 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_256) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_257) c_~A~0.base) c_~A~0.offset) 2147483650))) is different from false [2023-11-06 22:26:02,622 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:02,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-11-06 22:26:02,636 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:02,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 271 [2023-11-06 22:26:02,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 120 [2023-11-06 22:26:02,669 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-11-06 22:26:02,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2023-11-06 22:26:02,815 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 22:26:02,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116258180] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:02,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:02,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-06 22:26:02,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541135637] [2023-11-06 22:26:02,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:02,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:26:02,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:02,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:26:02,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=213, Unknown=3, NotChecked=30, Total=306 [2023-11-06 22:26:02,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 359 [2023-11-06 22:26:02,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 226 flow. Second operand has 18 states, 18 states have (on average 130.5) internal successors, (2349), 18 states have internal predecessors, (2349), 0 states have call successors, (0), 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 22:26:02,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:02,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 359 [2023-11-06 22:26:02,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:06,206 INFO L124 PetriNetUnfolderBase]: 22247/29210 cut-off events. [2023-11-06 22:26:06,206 INFO L125 PetriNetUnfolderBase]: For 31176/31176 co-relation queries the response was YES. [2023-11-06 22:26:06,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86978 conditions, 29210 events. 22247/29210 cut-off events. For 31176/31176 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 142032 event pairs, 3116 based on Foata normal form. 80/22683 useless extension candidates. Maximal degree in co-relation 59905. Up to 21975 conditions per place. [2023-11-06 22:26:06,370 INFO L140 encePairwiseOnDemand]: 349/359 looper letters, 141 selfloop transitions, 16 changer transitions 0/157 dead transitions. [2023-11-06 22:26:06,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 157 transitions, 1031 flow [2023-11-06 22:26:06,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:26:06,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:26:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1132 transitions. [2023-11-06 22:26:06,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39415041782729804 [2023-11-06 22:26:06,376 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1132 transitions. [2023-11-06 22:26:06,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1132 transitions. [2023-11-06 22:26:06,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:06,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1132 transitions. [2023-11-06 22:26:06,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 141.5) internal successors, (1132), 8 states have internal predecessors, (1132), 0 states have call successors, (0), 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 22:26:06,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 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 22:26:06,387 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 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 22:26:06,387 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 226 flow. Second operand 8 states and 1132 transitions. [2023-11-06 22:26:06,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 157 transitions, 1031 flow [2023-11-06 22:26:06,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 157 transitions, 1025 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:26:06,437 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 307 flow [2023-11-06 22:26:06,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=307, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-11-06 22:26:06,438 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2023-11-06 22:26:06,438 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 307 flow [2023-11-06 22:26:06,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 130.5) internal successors, (2349), 18 states have internal predecessors, (2349), 0 states have call successors, (0), 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 22:26:06,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:06,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:06,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:06,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:06,640 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:06,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:06,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1020406089, now seen corresponding path program 1 times [2023-11-06 22:26:06,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:06,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343458875] [2023-11-06 22:26:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:06,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:26:06,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:06,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343458875] [2023-11-06 22:26:06,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343458875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:06,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126897168] [2023-11-06 22:26:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:06,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:06,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:06,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:06,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:26:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:06,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:26:06,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:06,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:07,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126897168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:07,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:07,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 12 [2023-11-06 22:26:07,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239137401] [2023-11-06 22:26:07,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:07,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:26:07,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:26:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:26:07,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 359 [2023-11-06 22:26:07,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 307 flow. Second operand has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 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 22:26:07,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:07,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 359 [2023-11-06 22:26:07,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:10,537 INFO L124 PetriNetUnfolderBase]: 21114/28274 cut-off events. [2023-11-06 22:26:10,538 INFO L125 PetriNetUnfolderBase]: For 31563/32331 co-relation queries the response was YES. [2023-11-06 22:26:10,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87031 conditions, 28274 events. 21114/28274 cut-off events. For 31563/32331 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 153088 event pairs, 7510 based on Foata normal form. 836/24254 useless extension candidates. Maximal degree in co-relation 64549. Up to 8441 conditions per place. [2023-11-06 22:26:10,700 INFO L140 encePairwiseOnDemand]: 350/359 looper letters, 199 selfloop transitions, 12 changer transitions 0/213 dead transitions. [2023-11-06 22:26:10,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 213 transitions, 1434 flow [2023-11-06 22:26:10,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:26:10,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:26:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1531 transitions. [2023-11-06 22:26:10,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738471061590839 [2023-11-06 22:26:10,708 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1531 transitions. [2023-11-06 22:26:10,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1531 transitions. [2023-11-06 22:26:10,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:10,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1531 transitions. [2023-11-06 22:26:10,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 170.11111111111111) internal successors, (1531), 9 states have internal predecessors, (1531), 0 states have call successors, (0), 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 22:26:10,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 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 22:26:10,725 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 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 22:26:10,725 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 307 flow. Second operand 9 states and 1531 transitions. [2023-11-06 22:26:10,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 213 transitions, 1434 flow [2023-11-06 22:26:10,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 213 transitions, 1415 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-06 22:26:10,832 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 347 flow [2023-11-06 22:26:10,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-11-06 22:26:10,835 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2023-11-06 22:26:10,835 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 347 flow [2023-11-06 22:26:10,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 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 22:26:10,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:10,846 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:10,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:11,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:11,052 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:11,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash -338537757, now seen corresponding path program 2 times [2023-11-06 22:26:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:11,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874903059] [2023-11-06 22:26:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:26:11,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:11,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874903059] [2023-11-06 22:26:11,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874903059] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:11,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279824571] [2023-11-06 22:26:11,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:26:11,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:11,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:11,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:11,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:26:11,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:26:11,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:11,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:26:11,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:26:11,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:11,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279824571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:11,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:26:11,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-06 22:26:11,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792832205] [2023-11-06 22:26:11,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:11,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:11,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:11,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:11,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:26:11,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 359 [2023-11-06 22:26:11,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 347 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 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 22:26:11,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:11,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 359 [2023-11-06 22:26:11,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:13,607 INFO L124 PetriNetUnfolderBase]: 16038/21047 cut-off events. [2023-11-06 22:26:13,607 INFO L125 PetriNetUnfolderBase]: For 45325/46823 co-relation queries the response was YES. [2023-11-06 22:26:13,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67326 conditions, 21047 events. 16038/21047 cut-off events. For 45325/46823 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 104087 event pairs, 10303 based on Foata normal form. 2517/20572 useless extension candidates. Maximal degree in co-relation 60005. Up to 21006 conditions per place. [2023-11-06 22:26:13,753 INFO L140 encePairwiseOnDemand]: 355/359 looper letters, 58 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-11-06 22:26:13,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 61 transitions, 416 flow [2023-11-06 22:26:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-11-06 22:26:13,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49675023212627667 [2023-11-06 22:26:13,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-11-06 22:26:13,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-11-06 22:26:13,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:13,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-11-06 22:26:13,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 22:26:13,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:26:13,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:26:13,771 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 347 flow. Second operand 3 states and 535 transitions. [2023-11-06 22:26:13,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 61 transitions, 416 flow [2023-11-06 22:26:13,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 389 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-11-06 22:26:13,862 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 273 flow [2023-11-06 22:26:13,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-11-06 22:26:13,865 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2023-11-06 22:26:13,865 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 273 flow [2023-11-06 22:26:13,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 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 22:26:13,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:13,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:13,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 22:26:14,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:14,075 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:14,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1735223111, now seen corresponding path program 1 times [2023-11-06 22:26:14,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:14,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276674284] [2023-11-06 22:26:14,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:14,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:14,835 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 22:26:14,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:14,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276674284] [2023-11-06 22:26:14,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276674284] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:14,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429897948] [2023-11-06 22:26:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:14,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:14,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:14,838 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:14,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:26:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:14,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:26:14,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:15,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:15,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-06 22:26:15,065 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:26:15,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:15,129 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:15,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:15,193 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:15,217 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:15,229 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 22:26:15,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:15,505 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:15,505 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2023-11-06 22:26:15,522 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:15,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1099 treesize of output 1083 [2023-11-06 22:26:15,570 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 127 [2023-11-06 22:26:15,581 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 119 [2023-11-06 22:26:15,592 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 115 [2023-11-06 22:26:15,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 110 [2023-11-06 22:26:15,831 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 22:26:15,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429897948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:15,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:15,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-06 22:26:15,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252362863] [2023-11-06 22:26:15,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:15,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:26:15,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:15,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:26:15,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=233, Unknown=13, NotChecked=0, Total=306 [2023-11-06 22:26:16,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 359 [2023-11-06 22:26:16,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 273 flow. Second operand has 18 states, 18 states have (on average 127.38888888888889) internal successors, (2293), 18 states have internal predecessors, (2293), 0 states have call successors, (0), 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 22:26:16,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:16,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 359 [2023-11-06 22:26:16,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:19,162 INFO L124 PetriNetUnfolderBase]: 14299/18956 cut-off events. [2023-11-06 22:26:19,162 INFO L125 PetriNetUnfolderBase]: For 18617/18617 co-relation queries the response was YES. [2023-11-06 22:26:19,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58675 conditions, 18956 events. 14299/18956 cut-off events. For 18617/18617 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 88903 event pairs, 5632 based on Foata normal form. 582/17096 useless extension candidates. Maximal degree in co-relation 58656. Up to 11812 conditions per place. [2023-11-06 22:26:19,260 INFO L140 encePairwiseOnDemand]: 351/359 looper letters, 107 selfloop transitions, 14 changer transitions 0/121 dead transitions. [2023-11-06 22:26:19,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 761 flow [2023-11-06 22:26:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:26:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:26:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 952 transitions. [2023-11-06 22:26:19,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3788300835654596 [2023-11-06 22:26:19,265 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 952 transitions. [2023-11-06 22:26:19,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 952 transitions. [2023-11-06 22:26:19,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:19,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 952 transitions. [2023-11-06 22:26:19,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 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 22:26:19,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 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 22:26:19,274 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 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 22:26:19,274 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 273 flow. Second operand 7 states and 952 transitions. [2023-11-06 22:26:19,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 761 flow [2023-11-06 22:26:19,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 121 transitions, 758 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:26:19,324 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 306 flow [2023-11-06 22:26:19,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2023-11-06 22:26:19,325 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2023-11-06 22:26:19,325 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 306 flow [2023-11-06 22:26:19,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.38888888888889) internal successors, (2293), 18 states have internal predecessors, (2293), 0 states have call successors, (0), 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 22:26:19,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:19,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:19,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:19,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:26:19,531 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:19,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:19,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1735223871, now seen corresponding path program 1 times [2023-11-06 22:26:19,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:19,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627048084] [2023-11-06 22:26:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:19,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:26:19,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:19,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627048084] [2023-11-06 22:26:19,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627048084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:19,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:19,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:19,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023938749] [2023-11-06 22:26:19,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:19,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:19,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:19,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:19,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:19,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 359 [2023-11-06 22:26:19,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 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 22:26:19,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:19,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 359 [2023-11-06 22:26:19,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:21,659 INFO L124 PetriNetUnfolderBase]: 13750/18091 cut-off events. [2023-11-06 22:26:21,660 INFO L125 PetriNetUnfolderBase]: For 27194/29027 co-relation queries the response was YES. [2023-11-06 22:26:21,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61453 conditions, 18091 events. 13750/18091 cut-off events. For 27194/29027 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 91266 event pairs, 1739 based on Foata normal form. 1833/18296 useless extension candidates. Maximal degree in co-relation 61432. Up to 16409 conditions per place. [2023-11-06 22:26:21,769 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 88 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-11-06 22:26:21,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 642 flow [2023-11-06 22:26:21,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:21,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-11-06 22:26:21,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125348189415042 [2023-11-06 22:26:21,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-11-06 22:26:21,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-11-06 22:26:21,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:21,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-11-06 22:26:21,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 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 22:26:21,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:26:21,778 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:26:21,778 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 306 flow. Second operand 3 states and 552 transitions. [2023-11-06 22:26:21,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 642 flow [2023-11-06 22:26:21,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 92 transitions, 620 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-06 22:26:21,995 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 298 flow [2023-11-06 22:26:21,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2023-11-06 22:26:21,996 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2023-11-06 22:26:21,996 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 298 flow [2023-11-06 22:26:21,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 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 22:26:21,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:21,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:21,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:26:21,997 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:21,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:21,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1735077897, now seen corresponding path program 1 times [2023-11-06 22:26:21,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:21,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064062018] [2023-11-06 22:26:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:21,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:26:22,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:22,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064062018] [2023-11-06 22:26:22,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064062018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:22,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:22,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:26:22,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768342698] [2023-11-06 22:26:22,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:22,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:22,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:22,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:22,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 359 [2023-11-06 22:26:22,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 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 22:26:22,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:22,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 359 [2023-11-06 22:26:22,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:23,565 INFO L124 PetriNetUnfolderBase]: 10505/13782 cut-off events. [2023-11-06 22:26:23,565 INFO L125 PetriNetUnfolderBase]: For 17730/17730 co-relation queries the response was YES. [2023-11-06 22:26:23,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46634 conditions, 13782 events. 10505/13782 cut-off events. For 17730/17730 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 60906 event pairs, 2378 based on Foata normal form. 618/13782 useless extension candidates. Maximal degree in co-relation 46612. Up to 8208 conditions per place. [2023-11-06 22:26:23,665 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 84 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2023-11-06 22:26:23,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 588 flow [2023-11-06 22:26:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:23,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-11-06 22:26:23,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078922934076138 [2023-11-06 22:26:23,668 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-11-06 22:26:23,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-11-06 22:26:23,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:23,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-11-06 22:26:23,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 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 22:26:23,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:26:23,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:26:23,674 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 298 flow. Second operand 3 states and 547 transitions. [2023-11-06 22:26:23,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 588 flow [2023-11-06 22:26:23,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 568 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:26:23,721 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 270 flow [2023-11-06 22:26:23,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-11-06 22:26:23,722 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 17 predicate places. [2023-11-06 22:26:23,722 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 270 flow [2023-11-06 22:26:23,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 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 22:26:23,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:23,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:23,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 22:26:23,723 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:23,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:23,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1735077845, now seen corresponding path program 1 times [2023-11-06 22:26:23,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:23,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432735370] [2023-11-06 22:26:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:23,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:23,857 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 22:26:23,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:23,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432735370] [2023-11-06 22:26:23,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432735370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:23,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814759962] [2023-11-06 22:26:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:23,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:23,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:23,863 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:23,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:26:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:24,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:26:24,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:24,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814759962] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:24,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:24,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-06 22:26:24,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631831526] [2023-11-06 22:26:24,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:24,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:26:24,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:24,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:26:24,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:26:24,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 359 [2023-11-06 22:26:24,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 270 flow. Second operand has 14 states, 14 states have (on average 155.57142857142858) internal successors, (2178), 14 states have internal predecessors, (2178), 0 states have call successors, (0), 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 22:26:24,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:24,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 359 [2023-11-06 22:26:24,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:26,243 INFO L124 PetriNetUnfolderBase]: 9776/12937 cut-off events. [2023-11-06 22:26:26,243 INFO L125 PetriNetUnfolderBase]: For 21129/21129 co-relation queries the response was YES. [2023-11-06 22:26:26,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43982 conditions, 12937 events. 9776/12937 cut-off events. For 21129/21129 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 56308 event pairs, 5356 based on Foata normal form. 448/13385 useless extension candidates. Maximal degree in co-relation 43962. Up to 9162 conditions per place. [2023-11-06 22:26:26,327 INFO L140 encePairwiseOnDemand]: 352/359 looper letters, 107 selfloop transitions, 11 changer transitions 3/121 dead transitions. [2023-11-06 22:26:26,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 121 transitions, 757 flow [2023-11-06 22:26:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:26:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:26:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1176 transitions. [2023-11-06 22:26:26,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467966573816156 [2023-11-06 22:26:26,333 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1176 transitions. [2023-11-06 22:26:26,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1176 transitions. [2023-11-06 22:26:26,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:26,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1176 transitions. [2023-11-06 22:26:26,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 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 22:26:26,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 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 22:26:26,343 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 359.0) internal successors, (2872), 8 states have internal predecessors, (2872), 0 states have call successors, (0), 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 22:26:26,343 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 270 flow. Second operand 7 states and 1176 transitions. [2023-11-06 22:26:26,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 121 transitions, 757 flow [2023-11-06 22:26:26,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 121 transitions, 737 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:26:26,386 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 363 flow [2023-11-06 22:26:26,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=363, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-11-06 22:26:26,387 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2023-11-06 22:26:26,387 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 363 flow [2023-11-06 22:26:26,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 155.57142857142858) internal successors, (2178), 14 states have internal predecessors, (2178), 0 states have call successors, (0), 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 22:26:26,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:26,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:26,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:26,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:26:26,588 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:26,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash -211451977, now seen corresponding path program 2 times [2023-11-06 22:26:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347613069] [2023-11-06 22:26:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:26,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:27,177 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 22:26:27,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:27,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347613069] [2023-11-06 22:26:27,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347613069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:27,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830375637] [2023-11-06 22:26:27,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:26:27,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:27,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:27,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:27,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:26:27,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:26:27,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:27,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:26:27,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:27,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 22:26:27,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:27,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:26:27,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:27,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:26:27,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:27,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:26:27,675 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-06 22:26:27,707 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 22:26:27,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:27,813 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_502 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_502) c_~A~0.base) (+ c_~A~0.offset 4))))) is different from false [2023-11-06 22:26:27,971 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:27,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-11-06 22:26:27,984 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:27,985 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 619 treesize of output 595 [2023-11-06 22:26:27,999 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2023-11-06 22:26:28,009 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2023-11-06 22:26:28,068 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 50 [2023-11-06 22:26:28,170 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 22:26:28,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830375637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:28,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:28,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-11-06 22:26:28,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329717348] [2023-11-06 22:26:28,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:28,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:26:28,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:28,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:26:28,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=513, Unknown=7, NotChecked=46, Total=650 [2023-11-06 22:26:28,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 359 [2023-11-06 22:26:28,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 363 flow. Second operand has 26 states, 26 states have (on average 130.3846153846154) internal successors, (3390), 26 states have internal predecessors, (3390), 0 states have call successors, (0), 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 22:26:28,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:28,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 359 [2023-11-06 22:26:28,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:30,616 INFO L124 PetriNetUnfolderBase]: 9950/13153 cut-off events. [2023-11-06 22:26:30,616 INFO L125 PetriNetUnfolderBase]: For 25840/25840 co-relation queries the response was YES. [2023-11-06 22:26:30,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47128 conditions, 13153 events. 9950/13153 cut-off events. For 25840/25840 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 56600 event pairs, 6447 based on Foata normal form. 42/12739 useless extension candidates. Maximal degree in co-relation 47104. Up to 11974 conditions per place. [2023-11-06 22:26:30,697 INFO L140 encePairwiseOnDemand]: 351/359 looper letters, 105 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2023-11-06 22:26:30,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 120 transitions, 856 flow [2023-11-06 22:26:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:26:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:26:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1107 transitions. [2023-11-06 22:26:30,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854456824512535 [2023-11-06 22:26:30,703 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1107 transitions. [2023-11-06 22:26:30,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1107 transitions. [2023-11-06 22:26:30,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:30,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1107 transitions. [2023-11-06 22:26:30,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 138.375) internal successors, (1107), 8 states have internal predecessors, (1107), 0 states have call successors, (0), 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 22:26:30,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 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 22:26:30,712 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 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 22:26:30,712 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 363 flow. Second operand 8 states and 1107 transitions. [2023-11-06 22:26:30,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 120 transitions, 856 flow [2023-11-06 22:26:30,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 847 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-06 22:26:30,820 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 426 flow [2023-11-06 22:26:30,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=426, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2023-11-06 22:26:30,821 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 30 predicate places. [2023-11-06 22:26:30,821 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 426 flow [2023-11-06 22:26:30,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 130.3846153846154) internal successors, (3390), 26 states have internal predecessors, (3390), 0 states have call successors, (0), 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 22:26:30,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:30,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:30,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:31,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:26:31,029 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:31,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:31,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2083441837, now seen corresponding path program 1 times [2023-11-06 22:26:31,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:31,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629644260] [2023-11-06 22:26:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:31,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:26:31,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:31,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629644260] [2023-11-06 22:26:31,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629644260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:31,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:31,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:31,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97193759] [2023-11-06 22:26:31,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:31,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:31,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:31,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 359 [2023-11-06 22:26:31,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 426 flow. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 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 22:26:31,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:31,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 359 [2023-11-06 22:26:31,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:32,502 INFO L124 PetriNetUnfolderBase]: 9202/12164 cut-off events. [2023-11-06 22:26:32,502 INFO L125 PetriNetUnfolderBase]: For 25023/25852 co-relation queries the response was YES. [2023-11-06 22:26:32,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45601 conditions, 12164 events. 9202/12164 cut-off events. For 25023/25852 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 57568 event pairs, 1781 based on Foata normal form. 953/12645 useless extension candidates. Maximal degree in co-relation 45575. Up to 9422 conditions per place. [2023-11-06 22:26:32,597 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 101 selfloop transitions, 3 changer transitions 0/108 dead transitions. [2023-11-06 22:26:32,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 876 flow [2023-11-06 22:26:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-11-06 22:26:32,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078922934076138 [2023-11-06 22:26:32,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-11-06 22:26:32,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-11-06 22:26:32,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:32,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-11-06 22:26:32,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 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 22:26:32,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:26:32,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:26:32,605 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 426 flow. Second operand 3 states and 547 transitions. [2023-11-06 22:26:32,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 876 flow [2023-11-06 22:26:32,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 108 transitions, 837 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-06 22:26:32,758 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 412 flow [2023-11-06 22:26:32,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2023-11-06 22:26:32,759 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 30 predicate places. [2023-11-06 22:26:32,760 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 412 flow [2023-11-06 22:26:32,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 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 22:26:32,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:32,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:32,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-06 22:26:32,761 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:32,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:32,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2039429929, now seen corresponding path program 1 times [2023-11-06 22:26:32,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:32,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378716805] [2023-11-06 22:26:32,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:32,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:33,576 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 22:26:33,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:33,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378716805] [2023-11-06 22:26:33,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378716805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:33,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546631714] [2023-11-06 22:26:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:33,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:33,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:33,579 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:33,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:26:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:33,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:26:33,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:33,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:33,761 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-06 22:26:33,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:26:33,929 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:34,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:34,064 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:34,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:34,103 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:34,121 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 22:26:34,144 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 22:26:34,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:34,270 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_580 (Array Int Int)) (v_ArrVal_581 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_580) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_581) c_~A~0.base) (+ c_~A~0.offset 4))))) is different from false [2023-11-06 22:26:34,418 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:34,419 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-11-06 22:26:34,442 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:34,443 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2451 treesize of output 2403 [2023-11-06 22:26:34,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 274 [2023-11-06 22:26:34,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2023-11-06 22:26:34,520 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 238 [2023-11-06 22:26:34,540 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-11-06 22:26:34,843 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 22:26:34,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546631714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:34,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:34,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-06 22:26:34,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210363692] [2023-11-06 22:26:34,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:34,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:26:34,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:26:34,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=543, Unknown=10, NotChecked=48, Total=702 [2023-11-06 22:26:35,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 359 [2023-11-06 22:26:35,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 412 flow. Second operand has 27 states, 27 states have (on average 127.4074074074074) internal successors, (3440), 27 states have internal predecessors, (3440), 0 states have call successors, (0), 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 22:26:35,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:35,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 359 [2023-11-06 22:26:35,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:37,670 INFO L124 PetriNetUnfolderBase]: 10879/14298 cut-off events. [2023-11-06 22:26:37,670 INFO L125 PetriNetUnfolderBase]: For 31973/31973 co-relation queries the response was YES. [2023-11-06 22:26:37,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54773 conditions, 14298 events. 10879/14298 cut-off events. For 31973/31973 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 61759 event pairs, 4783 based on Foata normal form. 354/13902 useless extension candidates. Maximal degree in co-relation 54745. Up to 7530 conditions per place. [2023-11-06 22:26:37,784 INFO L140 encePairwiseOnDemand]: 352/359 looper letters, 115 selfloop transitions, 17 changer transitions 1/133 dead transitions. [2023-11-06 22:26:37,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 927 flow [2023-11-06 22:26:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:26:37,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:26:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1108 transitions. [2023-11-06 22:26:37,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38579387186629527 [2023-11-06 22:26:37,790 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1108 transitions. [2023-11-06 22:26:37,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1108 transitions. [2023-11-06 22:26:37,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:37,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1108 transitions. [2023-11-06 22:26:37,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 138.5) internal successors, (1108), 8 states have internal predecessors, (1108), 0 states have call successors, (0), 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 22:26:37,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 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 22:26:37,801 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 359.0) internal successors, (3231), 9 states have internal predecessors, (3231), 0 states have call successors, (0), 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 22:26:37,801 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 412 flow. Second operand 8 states and 1108 transitions. [2023-11-06 22:26:37,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 927 flow [2023-11-06 22:26:38,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 133 transitions, 904 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 22:26:38,280 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 464 flow [2023-11-06 22:26:38,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=464, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-11-06 22:26:38,281 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2023-11-06 22:26:38,281 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 464 flow [2023-11-06 22:26:38,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 127.4074074074074) internal successors, (3440), 27 states have internal predecessors, (3440), 0 states have call successors, (0), 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 22:26:38,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:38,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:38,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:38,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:38,483 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:38,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash -164474734, now seen corresponding path program 1 times [2023-11-06 22:26:38,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:38,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257525795] [2023-11-06 22:26:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:38,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:26:38,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:38,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257525795] [2023-11-06 22:26:38,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257525795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:38,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:38,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:38,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092983091] [2023-11-06 22:26:38,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:38,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:38,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:38,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:38,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:38,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 359 [2023-11-06 22:26:38,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 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 22:26:38,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:38,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 359 [2023-11-06 22:26:38,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:40,186 INFO L124 PetriNetUnfolderBase]: 10242/13434 cut-off events. [2023-11-06 22:26:40,186 INFO L125 PetriNetUnfolderBase]: For 41333/42209 co-relation queries the response was YES. [2023-11-06 22:26:40,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54421 conditions, 13434 events. 10242/13434 cut-off events. For 41333/42209 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 62393 event pairs, 1578 based on Foata normal form. 1016/13700 useless extension candidates. Maximal degree in co-relation 54393. Up to 10975 conditions per place. [2023-11-06 22:26:40,274 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 103 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2023-11-06 22:26:40,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 110 transitions, 939 flow [2023-11-06 22:26:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-11-06 22:26:40,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078922934076138 [2023-11-06 22:26:40,276 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-11-06 22:26:40,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-11-06 22:26:40,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:40,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-11-06 22:26:40,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 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 22:26:40,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:26:40,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 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 22:26:40,279 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 464 flow. Second operand 3 states and 547 transitions. [2023-11-06 22:26:40,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 110 transitions, 939 flow [2023-11-06 22:26:40,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 110 transitions, 847 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-11-06 22:26:40,370 INFO L231 Difference]: Finished difference. Result has 81 places, 72 transitions, 418 flow [2023-11-06 22:26:40,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2023-11-06 22:26:40,371 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2023-11-06 22:26:40,371 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 418 flow [2023-11-06 22:26:40,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 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 22:26:40,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:40,372 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:40,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-06 22:26:40,372 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:40,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2034926683, now seen corresponding path program 3 times [2023-11-06 22:26:40,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:40,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070990674] [2023-11-06 22:26:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:40,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:40,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:40,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070990674] [2023-11-06 22:26:40,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070990674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:40,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556282432] [2023-11-06 22:26:40,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:26:40,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:40,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:40,559 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:40,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:26:40,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:26:40,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:40,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:26:40,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:40,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:40,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556282432] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:40,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:40,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-06 22:26:40,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798986861] [2023-11-06 22:26:40,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:40,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:26:40,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:40,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:26:40,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:26:41,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 359 [2023-11-06 22:26:41,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 418 flow. Second operand has 19 states, 19 states have (on average 155.42105263157896) internal successors, (2953), 19 states have internal predecessors, (2953), 0 states have call successors, (0), 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 22:26:41,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:41,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 359 [2023-11-06 22:26:41,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:43,939 INFO L124 PetriNetUnfolderBase]: 16675/21973 cut-off events. [2023-11-06 22:26:43,939 INFO L125 PetriNetUnfolderBase]: For 43101/43101 co-relation queries the response was YES. [2023-11-06 22:26:44,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82049 conditions, 21973 events. 16675/21973 cut-off events. For 43101/43101 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 101538 event pairs, 7250 based on Foata normal form. 380/21973 useless extension candidates. Maximal degree in co-relation 82022. Up to 10269 conditions per place. [2023-11-06 22:26:44,107 INFO L140 encePairwiseOnDemand]: 352/359 looper letters, 171 selfloop transitions, 24 changer transitions 4/199 dead transitions. [2023-11-06 22:26:44,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 199 transitions, 1418 flow [2023-11-06 22:26:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:26:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:26:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1505 transitions. [2023-11-06 22:26:44,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46580006190034046 [2023-11-06 22:26:44,111 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1505 transitions. [2023-11-06 22:26:44,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1505 transitions. [2023-11-06 22:26:44,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:44,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1505 transitions. [2023-11-06 22:26:44,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.22222222222223) internal successors, (1505), 9 states have internal predecessors, (1505), 0 states have call successors, (0), 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 22:26:44,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 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 22:26:44,119 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 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 22:26:44,119 INFO L175 Difference]: Start difference. First operand has 81 places, 72 transitions, 418 flow. Second operand 9 states and 1505 transitions. [2023-11-06 22:26:44,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 199 transitions, 1418 flow [2023-11-06 22:26:44,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 199 transitions, 1400 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:26:44,542 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 620 flow [2023-11-06 22:26:44,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=620, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2023-11-06 22:26:44,543 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2023-11-06 22:26:44,543 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 620 flow [2023-11-06 22:26:44,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 155.42105263157896) internal successors, (2953), 19 states have internal predecessors, (2953), 0 states have call successors, (0), 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 22:26:44,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:44,543 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:44,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:44,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:26:44,744 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:44,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:44,744 INFO L85 PathProgramCache]: Analyzing trace with hash -269458499, now seen corresponding path program 4 times [2023-11-06 22:26:44,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:44,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516881692] [2023-11-06 22:26:44,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:44,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:45,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:45,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516881692] [2023-11-06 22:26:45,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516881692] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:45,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388544433] [2023-11-06 22:26:45,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:26:45,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:45,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:45,451 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:45,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:26:45,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:26:45,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:45,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:26:45,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:45,772 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:26:45,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:45,829 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:45,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:45,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:45,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:45,942 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:45,967 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 22:26:46,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 22:26:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:46,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:46,161 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_707 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_707) c_~A~0.base) (+ c_~A~0.offset 8)) 2147483650))) is different from false [2023-11-06 22:26:46,307 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:46,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-11-06 22:26:46,318 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:46,319 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 299 [2023-11-06 22:26:46,330 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 122 [2023-11-06 22:26:46,340 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2023-11-06 22:26:46,350 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2023-11-06 22:26:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:46,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388544433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:46,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:46,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-11-06 22:26:46,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127379233] [2023-11-06 22:26:46,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:46,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:26:46,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:46,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:26:46,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=710, Unknown=8, NotChecked=54, Total=870 [2023-11-06 22:26:46,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 359 [2023-11-06 22:26:46,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 620 flow. Second operand has 30 states, 30 states have (on average 130.33333333333334) internal successors, (3910), 30 states have internal predecessors, (3910), 0 states have call successors, (0), 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 22:26:46,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:46,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 359 [2023-11-06 22:26:46,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:50,175 INFO L124 PetriNetUnfolderBase]: 16849/22189 cut-off events. [2023-11-06 22:26:50,176 INFO L125 PetriNetUnfolderBase]: For 68878/68878 co-relation queries the response was YES. [2023-11-06 22:26:50,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91695 conditions, 22189 events. 16849/22189 cut-off events. For 68878/68878 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 101137 event pairs, 10468 based on Foata normal form. 42/21809 useless extension candidates. Maximal degree in co-relation 91664. Up to 20837 conditions per place. [2023-11-06 22:26:50,321 INFO L140 encePairwiseOnDemand]: 351/359 looper letters, 134 selfloop transitions, 19 changer transitions 0/153 dead transitions. [2023-11-06 22:26:50,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 153 transitions, 1283 flow [2023-11-06 22:26:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:26:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:26:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1378 transitions. [2023-11-06 22:26:50,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3838440111420613 [2023-11-06 22:26:50,325 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1378 transitions. [2023-11-06 22:26:50,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1378 transitions. [2023-11-06 22:26:50,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:50,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1378 transitions. [2023-11-06 22:26:50,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 0 states have call successors, (0), 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 22:26:50,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 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 22:26:50,332 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 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 22:26:50,332 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 620 flow. Second operand 10 states and 1378 transitions. [2023-11-06 22:26:50,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 153 transitions, 1283 flow [2023-11-06 22:26:51,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 153 transitions, 1267 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-06 22:26:51,014 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 712 flow [2023-11-06 22:26:51,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=712, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2023-11-06 22:26:51,015 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 49 predicate places. [2023-11-06 22:26:51,015 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 712 flow [2023-11-06 22:26:51,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 130.33333333333334) internal successors, (3910), 30 states have internal predecessors, (3910), 0 states have call successors, (0), 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 22:26:51,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:51,016 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:51,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:51,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:26:51,219 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:51,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:51,219 INFO L85 PathProgramCache]: Analyzing trace with hash 376325127, now seen corresponding path program 2 times [2023-11-06 22:26:51,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:51,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746520694] [2023-11-06 22:26:51,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:51,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:51,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:51,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746520694] [2023-11-06 22:26:51,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746520694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:51,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36724655] [2023-11-06 22:26:51,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:26:51,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:51,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:51,967 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:51,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:26:52,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:26:52,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:52,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-06 22:26:52,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:52,317 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:26:52,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:52,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:52,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:52,442 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:52,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:52,498 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:52,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:26:52,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 22:26:52,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 22:26:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:52,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:52,954 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_769 (Array Int Int)) (v_ArrVal_771 (Array Int Int)) (v_ArrVal_770 (Array Int Int)) (v_ArrVal_772 (Array Int Int))) (< 0 (+ (select (select (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_769) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_770) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_771) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_772) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483650))) is different from false [2023-11-06 22:26:52,968 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:52,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-11-06 22:26:52,985 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:52,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4899 treesize of output 4803 [2023-11-06 22:26:53,019 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 139 [2023-11-06 22:26:53,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 254 [2023-11-06 22:26:53,046 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 115 [2023-11-06 22:26:53,063 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 114 [2023-11-06 22:26:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-06 22:26:53,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36724655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:53,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:53,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-06 22:26:53,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828894887] [2023-11-06 22:26:53,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:53,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:26:53,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:53,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:26:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=855, Unknown=17, NotChecked=60, Total=1056 [2023-11-06 22:26:53,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 359 [2023-11-06 22:26:53,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 89 transitions, 712 flow. Second operand has 33 states, 33 states have (on average 127.33333333333333) internal successors, (4202), 33 states have internal predecessors, (4202), 0 states have call successors, (0), 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 22:26:53,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:53,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 359 [2023-11-06 22:26:53,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:57,929 INFO L124 PetriNetUnfolderBase]: 18203/23881 cut-off events. [2023-11-06 22:26:57,929 INFO L125 PetriNetUnfolderBase]: For 77722/77722 co-relation queries the response was YES. [2023-11-06 22:26:58,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100817 conditions, 23881 events. 18203/23881 cut-off events. For 77722/77722 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 109612 event pairs, 8530 based on Foata normal form. 338/23459 useless extension candidates. Maximal degree in co-relation 100783. Up to 11703 conditions per place. [2023-11-06 22:26:58,111 INFO L140 encePairwiseOnDemand]: 352/359 looper letters, 163 selfloop transitions, 22 changer transitions 1/186 dead transitions. [2023-11-06 22:26:58,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 186 transitions, 1490 flow [2023-11-06 22:26:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:26:58,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:26:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1381 transitions. [2023-11-06 22:26:58,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38467966573816154 [2023-11-06 22:26:58,115 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1381 transitions. [2023-11-06 22:26:58,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1381 transitions. [2023-11-06 22:26:58,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:58,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1381 transitions. [2023-11-06 22:26:58,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 138.1) internal successors, (1381), 10 states have internal predecessors, (1381), 0 states have call successors, (0), 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 22:26:58,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 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 22:26:58,123 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 359.0) internal successors, (3949), 11 states have internal predecessors, (3949), 0 states have call successors, (0), 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 22:26:58,123 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 712 flow. Second operand 10 states and 1381 transitions. [2023-11-06 22:26:58,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 186 transitions, 1490 flow [2023-11-06 22:26:58,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 186 transitions, 1450 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-06 22:26:58,804 INFO L231 Difference]: Finished difference. Result has 105 places, 91 transitions, 752 flow [2023-11-06 22:26:58,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=752, PETRI_PLACES=105, PETRI_TRANSITIONS=91} [2023-11-06 22:26:58,805 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 55 predicate places. [2023-11-06 22:26:58,805 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 91 transitions, 752 flow [2023-11-06 22:26:58,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 127.33333333333333) internal successors, (4202), 33 states have internal predecessors, (4202), 0 states have call successors, (0), 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 22:26:58,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:58,805 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:58,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:59,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:26:59,006 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:26:59,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:59,007 INFO L85 PathProgramCache]: Analyzing trace with hash 236724501, now seen corresponding path program 5 times [2023-11-06 22:26:59,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:59,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726652470] [2023-11-06 22:26:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:59,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:59,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:59,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726652470] [2023-11-06 22:26:59,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726652470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:59,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060863939] [2023-11-06 22:26:59,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:26:59,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:59,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:59,203 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:59,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:26:59,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:26:59,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:59,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:26:59,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:59,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:59,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060863939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:59,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:59,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-06 22:26:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271777367] [2023-11-06 22:26:59,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:59,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:26:59,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:59,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:26:59,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:27:00,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 359 [2023-11-06 22:27:00,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 91 transitions, 752 flow. Second operand has 24 states, 24 states have (on average 155.33333333333334) internal successors, (3728), 24 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:00,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:00,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 359 [2023-11-06 22:27:00,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:05,221 INFO L124 PetriNetUnfolderBase]: 26063/34144 cut-off events. [2023-11-06 22:27:05,222 INFO L125 PetriNetUnfolderBase]: For 109012/109012 co-relation queries the response was YES. [2023-11-06 22:27:05,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151571 conditions, 34144 events. 26063/34144 cut-off events. For 109012/109012 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 164480 event pairs, 9649 based on Foata normal form. 380/33468 useless extension candidates. Maximal degree in co-relation 151535. Up to 12175 conditions per place. [2023-11-06 22:27:05,528 INFO L140 encePairwiseOnDemand]: 352/359 looper letters, 200 selfloop transitions, 41 changer transitions 5/246 dead transitions. [2023-11-06 22:27:05,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 246 transitions, 2051 flow [2023-11-06 22:27:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:27:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:27:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1834 transitions. [2023-11-06 22:27:05,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46442137249936694 [2023-11-06 22:27:05,532 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1834 transitions. [2023-11-06 22:27:05,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1834 transitions. [2023-11-06 22:27:05,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:05,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1834 transitions. [2023-11-06 22:27:05,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 166.72727272727272) internal successors, (1834), 11 states have internal predecessors, (1834), 0 states have call successors, (0), 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 22:27:05,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 359.0) internal successors, (4308), 12 states have internal predecessors, (4308), 0 states have call successors, (0), 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 22:27:05,543 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 359.0) internal successors, (4308), 12 states have internal predecessors, (4308), 0 states have call successors, (0), 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 22:27:05,543 INFO L175 Difference]: Start difference. First operand has 105 places, 91 transitions, 752 flow. Second operand 11 states and 1834 transitions. [2023-11-06 22:27:05,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 246 transitions, 2051 flow [2023-11-06 22:27:10,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 246 transitions, 1938 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-11-06 22:27:10,228 INFO L231 Difference]: Finished difference. Result has 112 places, 106 transitions, 1019 flow [2023-11-06 22:27:10,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1019, PETRI_PLACES=112, PETRI_TRANSITIONS=106} [2023-11-06 22:27:10,229 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 62 predicate places. [2023-11-06 22:27:10,229 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 106 transitions, 1019 flow [2023-11-06 22:27:10,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 155.33333333333334) internal successors, (3728), 24 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:10,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:10,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:10,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:10,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:27:10,432 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-06 22:27:10,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:10,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1231723601, now seen corresponding path program 1 times [2023-11-06 22:27:10,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:10,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649753557] [2023-11-06 22:27:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:10,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:10,869 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 22:27:10,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:10,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649753557] [2023-11-06 22:27:10,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649753557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:10,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781981957] [2023-11-06 22:27:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:10,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:10,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:10,885 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:10,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da1dc239-48e5-4da1-890a-d58ac60de885/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:27:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:11,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:27:11,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:11,083 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:27:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:11,131 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:27:11,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:11,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:27:11,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:11,228 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:27:11,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-06 22:27:11,257 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 22:27:11,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:11,397 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:27:11,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-11-06 22:27:11,409 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:27:11,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1107 treesize of output 1075 [2023-11-06 22:27:11,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2023-11-06 22:27:11,436 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2023-11-06 22:27:11,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2023-11-06 22:27:11,488 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 22:27:11,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781981957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:11,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:27:11,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-06 22:27:11,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169499015] [2023-11-06 22:27:11,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:11,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:27:11,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:11,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:27:11,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=262, Unknown=14, NotChecked=0, Total=342 [2023-11-06 22:27:11,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 359 [2023-11-06 22:27:11,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 106 transitions, 1019 flow. Second operand has 19 states, 19 states have (on average 136.10526315789474) internal successors, (2586), 19 states have internal predecessors, (2586), 0 states have call successors, (0), 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 22:27:11,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:11,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 359 [2023-11-06 22:27:11,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand