./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5dd003755f1e361f3bbf00c3bfecbc1131b6df98a7806f5bb08971966b13d6ac --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:03:50,349 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:03:50,485 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 08:03:50,492 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:03:50,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:03:50,532 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:03:50,533 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:03:50,534 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:03:50,535 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:03:50,540 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:03:50,542 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:03:50,542 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:03:50,543 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:03:50,545 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:03:50,545 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:03:50,546 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:03:50,546 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:03:50,546 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:03:50,547 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:03:50,547 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:03:50,548 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:03:50,549 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:03:50,549 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 08:03:50,549 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:03:50,550 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:03:50,550 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:03:50,551 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:03:50,552 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:03:50,552 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:03:50,553 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:03:50,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:50,555 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:03:50,555 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:03:50,555 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:03:50,556 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:03:50,556 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:03:50,556 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:03:50,557 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:03:50,557 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:03:50,557 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:03:50,557 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:03:50,558 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_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dd003755f1e361f3bbf00c3bfecbc1131b6df98a7806f5bb08971966b13d6ac [2023-11-19 08:03:50,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:03:50,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:03:50,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:03:50,941 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:03:50,941 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:03:50,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-19 08:03:54,164 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:03:54,455 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:03:54,455 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-19 08:03:54,471 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/data/193832b02/75d0d5a3a7f449aebc764333b1a4a02f/FLAGacb482a42 [2023-11-19 08:03:54,494 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/data/193832b02/75d0d5a3a7f449aebc764333b1a4a02f [2023-11-19 08:03:54,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:03:54,504 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:03:54,509 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:54,510 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:03:54,516 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:03:54,517 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:54,518 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dce456f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54, skipping insertion in model container [2023-11-19 08:03:54,518 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:54,568 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:03:54,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:54,851 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:03:54,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:54,897 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:03:54,898 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:03:54,906 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:03:54,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54 WrapperNode [2023-11-19 08:03:54,907 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:54,908 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:54,909 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:03:54,909 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:03:54,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:54,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:54,972 INFO L138 Inliner]: procedures = 26, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 292 [2023-11-19 08:03:54,974 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:54,975 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:03:54,983 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:03:54,983 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:03:54,992 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:54,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:54,997 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:54,997 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:55,014 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:55,019 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:55,021 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:55,023 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:55,029 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:03:55,030 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:03:55,043 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:03:55,043 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:03:55,044 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (1/1) ... [2023-11-19 08:03:55,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:55,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:55,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:03:55,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:03:55,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:03:55,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:03:55,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:03:55,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:03:55,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:03:55,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:03:55,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:03:55,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:03:55,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 08:03:55,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 08:03:55,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:03:55,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:03:55,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:03:55,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:03:55,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:03:55,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:03:55,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:03:55,130 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:03:55,322 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:03:55,324 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:03:55,931 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:03:56,136 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:03:56,137 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-19 08:03:56,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:56 BoogieIcfgContainer [2023-11-19 08:03:56,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:03:56,152 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:03:56,152 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:03:56,156 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:03:56,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:54" (1/3) ... [2023-11-19 08:03:56,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a386084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:56, skipping insertion in model container [2023-11-19 08:03:56,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:54" (2/3) ... [2023-11-19 08:03:56,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a386084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:56, skipping insertion in model container [2023-11-19 08:03:56,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:56" (3/3) ... [2023-11-19 08:03:56,161 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-11-19 08:03:56,170 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:03:56,182 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:03:56,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-19 08:03:56,183 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:03:56,297 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 08:03:56,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 265 transitions, 551 flow [2023-11-19 08:03:56,489 INFO L124 PetriNetUnfolderBase]: 18/262 cut-off events. [2023-11-19 08:03:56,489 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:03:56,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 262 events. 18/262 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 269 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 213. Up to 3 conditions per place. [2023-11-19 08:03:56,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 265 transitions, 551 flow [2023-11-19 08:03:56,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 238 transitions, 491 flow [2023-11-19 08:03:56,515 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:03:56,528 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 238 transitions, 491 flow [2023-11-19 08:03:56,532 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 238 transitions, 491 flow [2023-11-19 08:03:56,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 238 transitions, 491 flow [2023-11-19 08:03:56,602 INFO L124 PetriNetUnfolderBase]: 17/238 cut-off events. [2023-11-19 08:03:56,602 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:03:56,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 238 events. 17/238 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 268 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 213. Up to 3 conditions per place. [2023-11-19 08:03:56,610 INFO L119 LiptonReduction]: Number of co-enabled transitions 4282 [2023-11-19 08:04:09,657 INFO L134 LiptonReduction]: Checked pairs total: 7513 [2023-11-19 08:04:09,657 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-11-19 08:04:09,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:04:09,682 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@594cd74d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:04:09,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-19 08:04:09,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:04:09,687 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 08:04:09,687 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:04:09,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:09,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:04:09,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:09,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:09,695 INFO L85 PathProgramCache]: Analyzing trace with hash 38196, now seen corresponding path program 1 times [2023-11-19 08:04:09,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98105820] [2023-11-19 08:04:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:09,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:10,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:10,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98105820] [2023-11-19 08:04:10,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98105820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:10,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:10,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:04:10,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418187142] [2023-11-19 08:04:10,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:10,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:10,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:10,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:10,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:10,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 517 [2023-11-19 08:04:10,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:10,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:10,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 517 [2023-11-19 08:04:10,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:10,813 INFO L124 PetriNetUnfolderBase]: 2127/3042 cut-off events. [2023-11-19 08:04:10,813 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2023-11-19 08:04:10,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6271 conditions, 3042 events. 2127/3042 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 13194 event pairs, 1769 based on Foata normal form. 0/1394 useless extension candidates. Maximal degree in co-relation 5558. Up to 3040 conditions per place. [2023-11-19 08:04:10,845 INFO L140 encePairwiseOnDemand]: 502/517 looper letters, 39 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-11-19 08:04:10,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 191 flow [2023-11-19 08:04:10,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 714 transitions. [2023-11-19 08:04:10,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46034816247582205 [2023-11-19 08:04:10,865 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 714 transitions. [2023-11-19 08:04:10,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 714 transitions. [2023-11-19 08:04:10,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:10,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 714 transitions. [2023-11-19 08:04:10,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:10,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:10,890 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:10,892 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 107 flow. Second operand 3 states and 714 transitions. [2023-11-19 08:04:10,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 191 flow [2023-11-19 08:04:10,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 182 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-19 08:04:10,903 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 130 flow [2023-11-19 08:04:10,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-11-19 08:04:10,908 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-11-19 08:04:10,909 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 130 flow [2023-11-19 08:04:10,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:10,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:10,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:04:10,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:04:10,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:10,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:10,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1185599, now seen corresponding path program 1 times [2023-11-19 08:04:10,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:10,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693944609] [2023-11-19 08:04:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:10,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:11,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:11,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693944609] [2023-11-19 08:04:11,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693944609] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:11,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425834324] [2023-11-19 08:04:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:11,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:11,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:11,067 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:11,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:04:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:11,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:04:11,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:11,273 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:11,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425834324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:11,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:04:11,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-19 08:04:11,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456995278] [2023-11-19 08:04:11,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:11,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:11,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:11,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:11,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:04:11,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 517 [2023-11-19 08:04:11,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:11,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:11,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 517 [2023-11-19 08:04:11,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:11,943 INFO L124 PetriNetUnfolderBase]: 2127/3040 cut-off events. [2023-11-19 08:04:11,943 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-19 08:04:11,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6220 conditions, 3040 events. 2127/3040 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 13172 event pairs, 1769 based on Foata normal form. 0/1396 useless extension candidates. Maximal degree in co-relation 6178. Up to 3032 conditions per place. [2023-11-19 08:04:11,969 INFO L140 encePairwiseOnDemand]: 510/517 looper letters, 36 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-11-19 08:04:11,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 206 flow [2023-11-19 08:04:11,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:04:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:04:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 924 transitions. [2023-11-19 08:04:11,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44680851063829785 [2023-11-19 08:04:11,974 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 924 transitions. [2023-11-19 08:04:11,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 924 transitions. [2023-11-19 08:04:11,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:11,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 924 transitions. [2023-11-19 08:04:11,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:11,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:11,987 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:11,987 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 130 flow. Second operand 4 states and 924 transitions. [2023-11-19 08:04:11,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 206 flow [2023-11-19 08:04:11,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:04:11,990 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 124 flow [2023-11-19 08:04:11,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-11-19 08:04:11,991 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2023-11-19 08:04:11,991 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 124 flow [2023-11-19 08:04:11,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:11,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:11,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:04:12,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:12,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:12,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:12,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1185613, now seen corresponding path program 1 times [2023-11-19 08:04:12,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:12,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298479989] [2023-11-19 08:04:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:12,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:12,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:12,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298479989] [2023-11-19 08:04:12,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298479989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:12,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418485067] [2023-11-19 08:04:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:12,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:12,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:12,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:12,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:04:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:12,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:04:12,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:12,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:12,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418485067] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:12,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:12,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-19 08:04:12,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606513307] [2023-11-19 08:04:12,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:12,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:04:12,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:12,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:04:12,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:04:12,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 517 [2023-11-19 08:04:12,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 124 flow. Second operand has 7 states, 7 states have (on average 221.14285714285714) internal successors, (1548), 7 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:12,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:12,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 517 [2023-11-19 08:04:12,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:13,112 INFO L124 PetriNetUnfolderBase]: 2133/3052 cut-off events. [2023-11-19 08:04:13,112 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-19 08:04:13,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6263 conditions, 3052 events. 2133/3052 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 13250 event pairs, 1769 based on Foata normal form. 0/1409 useless extension candidates. Maximal degree in co-relation 6178. Up to 3041 conditions per place. [2023-11-19 08:04:13,137 INFO L140 encePairwiseOnDemand]: 510/517 looper letters, 37 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2023-11-19 08:04:13,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 292 flow [2023-11-19 08:04:13,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:04:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:04:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1380 transitions. [2023-11-19 08:04:13,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448742746615087 [2023-11-19 08:04:13,143 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1380 transitions. [2023-11-19 08:04:13,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1380 transitions. [2023-11-19 08:04:13,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:13,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1380 transitions. [2023-11-19 08:04:13,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:13,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 517.0) internal successors, (3619), 7 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:13,161 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 517.0) internal successors, (3619), 7 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:13,161 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 124 flow. Second operand 6 states and 1380 transitions. [2023-11-19 08:04:13,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 292 flow [2023-11-19 08:04:13,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:04:13,164 INFO L231 Difference]: Finished difference. Result has 49 places, 54 transitions, 240 flow [2023-11-19 08:04:13,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=49, PETRI_TRANSITIONS=54} [2023-11-19 08:04:13,165 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-11-19 08:04:13,165 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 54 transitions, 240 flow [2023-11-19 08:04:13,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 221.14285714285714) internal successors, (1548), 7 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:13,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:13,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 08:04:13,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 08:04:13,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:13,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:13,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:13,390 INFO L85 PathProgramCache]: Analyzing trace with hash 989406924, now seen corresponding path program 1 times [2023-11-19 08:04:13,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:13,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850142991] [2023-11-19 08:04:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:13,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:13,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:13,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850142991] [2023-11-19 08:04:13,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850142991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:13,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:13,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:04:13,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797881620] [2023-11-19 08:04:13,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:13,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:13,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:13,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:13,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:13,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 517 [2023-11-19 08:04:13,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 54 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:13,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:13,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 517 [2023-11-19 08:04:13,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:14,215 INFO L124 PetriNetUnfolderBase]: 2220/3206 cut-off events. [2023-11-19 08:04:14,216 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-19 08:04:14,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6644 conditions, 3206 events. 2220/3206 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 14087 event pairs, 1844 based on Foata normal form. 58/1592 useless extension candidates. Maximal degree in co-relation 6550. Up to 3051 conditions per place. [2023-11-19 08:04:14,252 INFO L140 encePairwiseOnDemand]: 504/517 looper letters, 73 selfloop transitions, 5 changer transitions 1/79 dead transitions. [2023-11-19 08:04:14,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 514 flow [2023-11-19 08:04:14,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:04:14,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:04:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1147 transitions. [2023-11-19 08:04:14,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437137330754352 [2023-11-19 08:04:14,262 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1147 transitions. [2023-11-19 08:04:14,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1147 transitions. [2023-11-19 08:04:14,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:14,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1147 transitions. [2023-11-19 08:04:14,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.4) internal successors, (1147), 5 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:14,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 517.0) internal successors, (3102), 6 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:14,276 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 517.0) internal successors, (3102), 6 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:14,276 INFO L175 Difference]: Start difference. First operand has 49 places, 54 transitions, 240 flow. Second operand 5 states and 1147 transitions. [2023-11-19 08:04:14,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 514 flow [2023-11-19 08:04:14,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 79 transitions, 474 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:14,291 INFO L231 Difference]: Finished difference. Result has 54 places, 56 transitions, 261 flow [2023-11-19 08:04:14,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=54, PETRI_TRANSITIONS=56} [2023-11-19 08:04:14,294 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2023-11-19 08:04:14,294 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 56 transitions, 261 flow [2023-11-19 08:04:14,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:14,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:14,296 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 08:04:14,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:04:14,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:14,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash 961953794, now seen corresponding path program 2 times [2023-11-19 08:04:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:14,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108895640] [2023-11-19 08:04:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:14,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:14,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:14,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108895640] [2023-11-19 08:04:14,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108895640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:14,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784008118] [2023-11-19 08:04:14,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:04:14,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:14,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:14,447 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:14,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:04:14,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 08:04:14,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:14,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:04:14,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 08:04:14,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:14,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784008118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:14,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:04:14,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-19 08:04:14,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199580482] [2023-11-19 08:04:14,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:14,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:14,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:04:14,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 517 [2023-11-19 08:04:14,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 56 transitions, 261 flow. Second operand has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:14,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:14,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 517 [2023-11-19 08:04:14,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:15,133 INFO L124 PetriNetUnfolderBase]: 2220/3205 cut-off events. [2023-11-19 08:04:15,133 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2023-11-19 08:04:15,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7534 conditions, 3205 events. 2220/3205 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 14185 event pairs, 1844 based on Foata normal form. 1/1534 useless extension candidates. Maximal degree in co-relation 7453. Up to 3200 conditions per place. [2023-11-19 08:04:15,161 INFO L140 encePairwiseOnDemand]: 514/517 looper letters, 49 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2023-11-19 08:04:15,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 361 flow [2023-11-19 08:04:15,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:15,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-11-19 08:04:15,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577691811734365 [2023-11-19 08:04:15,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-11-19 08:04:15,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-11-19 08:04:15,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:15,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-11-19 08:04:15,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:15,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:15,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:15,175 INFO L175 Difference]: Start difference. First operand has 54 places, 56 transitions, 261 flow. Second operand 3 states and 710 transitions. [2023-11-19 08:04:15,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 361 flow [2023-11-19 08:04:15,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 353 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:15,179 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 255 flow [2023-11-19 08:04:15,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2023-11-19 08:04:15,182 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2023-11-19 08:04:15,183 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 255 flow [2023-11-19 08:04:15,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:15,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:15,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:15,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:15,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:15,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:15,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:15,396 INFO L85 PathProgramCache]: Analyzing trace with hash -216749121, now seen corresponding path program 1 times [2023-11-19 08:04:15,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:15,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455306574] [2023-11-19 08:04:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:15,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:15,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:15,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455306574] [2023-11-19 08:04:15,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455306574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:15,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:15,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:04:15,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869428121] [2023-11-19 08:04:15,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:15,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:15,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:15,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 517 [2023-11-19 08:04:15,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 255 flow. Second operand has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:15,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:15,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 517 [2023-11-19 08:04:15,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:16,233 INFO L124 PetriNetUnfolderBase]: 2996/4209 cut-off events. [2023-11-19 08:04:16,233 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-11-19 08:04:16,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10090 conditions, 4209 events. 2996/4209 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 19146 event pairs, 1792 based on Foata normal form. 0/1927 useless extension candidates. Maximal degree in co-relation 10007. Up to 3348 conditions per place. [2023-11-19 08:04:16,270 INFO L140 encePairwiseOnDemand]: 511/517 looper letters, 74 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-11-19 08:04:16,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 78 transitions, 472 flow [2023-11-19 08:04:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2023-11-19 08:04:16,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47904577691811734 [2023-11-19 08:04:16,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2023-11-19 08:04:16,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2023-11-19 08:04:16,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:16,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2023-11-19 08:04:16,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:16,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:16,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:16,283 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 255 flow. Second operand 3 states and 743 transitions. [2023-11-19 08:04:16,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 78 transitions, 472 flow [2023-11-19 08:04:16,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 78 transitions, 460 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:04:16,292 INFO L231 Difference]: Finished difference. Result has 55 places, 58 transitions, 277 flow [2023-11-19 08:04:16,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=55, PETRI_TRANSITIONS=58} [2023-11-19 08:04:16,296 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-11-19 08:04:16,296 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 58 transitions, 277 flow [2023-11-19 08:04:16,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:16,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:16,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:16,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:04:16,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:16,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:16,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1870713391, now seen corresponding path program 1 times [2023-11-19 08:04:16,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:16,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54615968] [2023-11-19 08:04:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:16,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:16,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54615968] [2023-11-19 08:04:16,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54615968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:16,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367605447] [2023-11-19 08:04:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:16,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:16,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:16,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:16,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:04:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:16,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:04:16,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:16,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:16,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367605447] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:16,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:16,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-19 08:04:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073395853] [2023-11-19 08:04:16,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:16,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:04:16,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:04:16,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:04:17,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 517 [2023-11-19 08:04:17,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 58 transitions, 277 flow. Second operand has 12 states, 12 states have (on average 211.58333333333334) internal successors, (2539), 12 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:17,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:17,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 517 [2023-11-19 08:04:17,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:18,156 INFO L124 PetriNetUnfolderBase]: 3543/5021 cut-off events. [2023-11-19 08:04:18,156 INFO L125 PetriNetUnfolderBase]: For 1552/1552 co-relation queries the response was YES. [2023-11-19 08:04:18,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13570 conditions, 5021 events. 3543/5021 cut-off events. For 1552/1552 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24576 event pairs, 725 based on Foata normal form. 400/3021 useless extension candidates. Maximal degree in co-relation 13462. Up to 1836 conditions per place. [2023-11-19 08:04:18,191 INFO L140 encePairwiseOnDemand]: 507/517 looper letters, 115 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2023-11-19 08:04:18,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 133 transitions, 787 flow [2023-11-19 08:04:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:04:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 08:04:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2435 transitions. [2023-11-19 08:04:18,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42816950940742043 [2023-11-19 08:04:18,201 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2435 transitions. [2023-11-19 08:04:18,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2435 transitions. [2023-11-19 08:04:18,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:18,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2435 transitions. [2023-11-19 08:04:18,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 221.36363636363637) internal successors, (2435), 11 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:18,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 517.0) internal successors, (6204), 12 states have internal predecessors, (6204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:18,223 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 517.0) internal successors, (6204), 12 states have internal predecessors, (6204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:18,223 INFO L175 Difference]: Start difference. First operand has 55 places, 58 transitions, 277 flow. Second operand 11 states and 2435 transitions. [2023-11-19 08:04:18,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 133 transitions, 787 flow [2023-11-19 08:04:18,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 133 transitions, 777 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:18,229 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 363 flow [2023-11-19 08:04:18,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=363, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2023-11-19 08:04:18,230 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2023-11-19 08:04:18,230 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 363 flow [2023-11-19 08:04:18,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 211.58333333333334) internal successors, (2539), 12 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:18,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:18,232 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-19 08:04:18,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:18,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:04:18,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:18,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:18,448 INFO L85 PathProgramCache]: Analyzing trace with hash 594631769, now seen corresponding path program 1 times [2023-11-19 08:04:18,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:18,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491903025] [2023-11-19 08:04:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:18,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:18,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:18,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491903025] [2023-11-19 08:04:18,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491903025] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:18,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27865137] [2023-11-19 08:04:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:18,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:18,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:18,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:18,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:04:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:18,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:04:18,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:18,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:18,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27865137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:18,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:18,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 08:04:18,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394563139] [2023-11-19 08:04:18,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:18,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:04:18,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:04:18,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:04:18,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 517 [2023-11-19 08:04:18,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 363 flow. Second operand has 13 states, 13 states have (on average 221.15384615384616) internal successors, (2875), 13 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:18,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:18,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 517 [2023-11-19 08:04:18,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:19,917 INFO L124 PetriNetUnfolderBase]: 3567/5069 cut-off events. [2023-11-19 08:04:19,917 INFO L125 PetriNetUnfolderBase]: For 2884/2884 co-relation queries the response was YES. [2023-11-19 08:04:19,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13622 conditions, 5069 events. 3567/5069 cut-off events. For 2884/2884 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23175 event pairs, 2725 based on Foata normal form. 18/2887 useless extension candidates. Maximal degree in co-relation 13301. Up to 5022 conditions per place. [2023-11-19 08:04:19,951 INFO L140 encePairwiseOnDemand]: 511/517 looper letters, 38 selfloop transitions, 55 changer transitions 0/93 dead transitions. [2023-11-19 08:04:19,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 771 flow [2023-11-19 08:04:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:04:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 08:04:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2720 transitions. [2023-11-19 08:04:19,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384268214055448 [2023-11-19 08:04:19,964 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2720 transitions. [2023-11-19 08:04:19,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2720 transitions. [2023-11-19 08:04:19,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:19,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2720 transitions. [2023-11-19 08:04:19,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 226.66666666666666) internal successors, (2720), 12 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:19,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 517.0) internal successors, (6721), 13 states have internal predecessors, (6721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:19,992 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 517.0) internal successors, (6721), 13 states have internal predecessors, (6721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:19,992 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 363 flow. Second operand 12 states and 2720 transitions. [2023-11-19 08:04:19,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 771 flow [2023-11-19 08:04:19,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 760 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-19 08:04:19,999 INFO L231 Difference]: Finished difference. Result has 77 places, 93 transitions, 746 flow [2023-11-19 08:04:20,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=746, PETRI_PLACES=77, PETRI_TRANSITIONS=93} [2023-11-19 08:04:20,000 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2023-11-19 08:04:20,001 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 93 transitions, 746 flow [2023-11-19 08:04:20,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 221.15384615384616) internal successors, (2875), 13 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:20,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:20,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:20,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:20,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:04:20,219 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:20,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:20,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1870713415, now seen corresponding path program 1 times [2023-11-19 08:04:20,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:20,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619437254] [2023-11-19 08:04:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:20,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:20,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:20,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619437254] [2023-11-19 08:04:20,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619437254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:20,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137100145] [2023-11-19 08:04:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:20,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:20,305 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:20,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:04:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:20,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:04:20,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:20,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:20,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137100145] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:20,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:20,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 08:04:20,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191430315] [2023-11-19 08:04:20,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:20,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:04:20,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:20,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:04:20,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:04:20,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 517 [2023-11-19 08:04:20,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 93 transitions, 746 flow. Second operand has 7 states, 7 states have (on average 228.85714285714286) internal successors, (1602), 7 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:20,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:20,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 517 [2023-11-19 08:04:20,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:21,812 INFO L124 PetriNetUnfolderBase]: 6207/8309 cut-off events. [2023-11-19 08:04:21,812 INFO L125 PetriNetUnfolderBase]: For 1546/1546 co-relation queries the response was YES. [2023-11-19 08:04:21,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24032 conditions, 8309 events. 6207/8309 cut-off events. For 1546/1546 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37844 event pairs, 1825 based on Foata normal form. 0/4237 useless extension candidates. Maximal degree in co-relation 23857. Up to 4224 conditions per place. [2023-11-19 08:04:21,869 INFO L140 encePairwiseOnDemand]: 512/517 looper letters, 177 selfloop transitions, 15 changer transitions 0/192 dead transitions. [2023-11-19 08:04:21,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 192 transitions, 1389 flow [2023-11-19 08:04:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:04:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:04:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1727 transitions. [2023-11-19 08:04:21,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47720364741641336 [2023-11-19 08:04:21,877 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1727 transitions. [2023-11-19 08:04:21,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1727 transitions. [2023-11-19 08:04:21,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:21,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1727 transitions. [2023-11-19 08:04:21,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 246.71428571428572) internal successors, (1727), 7 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:21,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 517.0) internal successors, (4136), 8 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:21,891 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 517.0) internal successors, (4136), 8 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:21,891 INFO L175 Difference]: Start difference. First operand has 77 places, 93 transitions, 746 flow. Second operand 7 states and 1727 transitions. [2023-11-19 08:04:21,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 192 transitions, 1389 flow [2023-11-19 08:04:21,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 192 transitions, 1223 flow, removed 52 selfloop flow, removed 5 redundant places. [2023-11-19 08:04:21,903 INFO L231 Difference]: Finished difference. Result has 81 places, 102 transitions, 687 flow [2023-11-19 08:04:21,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=687, PETRI_PLACES=81, PETRI_TRANSITIONS=102} [2023-11-19 08:04:21,904 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2023-11-19 08:04:21,904 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 102 transitions, 687 flow [2023-11-19 08:04:21,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 228.85714285714286) internal successors, (1602), 7 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:21,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:21,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:21,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:22,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 08:04:22,127 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:22,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:22,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1870713416, now seen corresponding path program 1 times [2023-11-19 08:04:22,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:22,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123578204] [2023-11-19 08:04:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:22,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:22,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:22,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123578204] [2023-11-19 08:04:22,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123578204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:22,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600298826] [2023-11-19 08:04:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:22,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:22,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:22,297 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:22,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:04:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:22,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:04:22,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:22,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:22,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600298826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:22,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:04:22,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2023-11-19 08:04:22,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998855896] [2023-11-19 08:04:22,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:22,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:22,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:04:22,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 517 [2023-11-19 08:04:22,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 687 flow. Second operand has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:22,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:22,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 517 [2023-11-19 08:04:22,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:23,596 INFO L124 PetriNetUnfolderBase]: 5127/7029 cut-off events. [2023-11-19 08:04:23,596 INFO L125 PetriNetUnfolderBase]: For 2227/2227 co-relation queries the response was YES. [2023-11-19 08:04:23,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23717 conditions, 7029 events. 5127/7029 cut-off events. For 2227/2227 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 32415 event pairs, 977 based on Foata normal form. 0/4581 useless extension candidates. Maximal degree in co-relation 23570. Up to 3600 conditions per place. [2023-11-19 08:04:23,664 INFO L140 encePairwiseOnDemand]: 513/517 looper letters, 125 selfloop transitions, 9 changer transitions 0/134 dead transitions. [2023-11-19 08:04:23,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 134 transitions, 1002 flow [2023-11-19 08:04:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:04:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:04:23,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 980 transitions. [2023-11-19 08:04:23,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738878143133462 [2023-11-19 08:04:23,670 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 980 transitions. [2023-11-19 08:04:23,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 980 transitions. [2023-11-19 08:04:23,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:23,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 980 transitions. [2023-11-19 08:04:23,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:23,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:23,680 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:23,681 INFO L175 Difference]: Start difference. First operand has 81 places, 102 transitions, 687 flow. Second operand 4 states and 980 transitions. [2023-11-19 08:04:23,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 134 transitions, 1002 flow [2023-11-19 08:04:23,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 134 transitions, 979 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:23,750 INFO L231 Difference]: Finished difference. Result has 81 places, 98 transitions, 647 flow [2023-11-19 08:04:23,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=647, PETRI_PLACES=81, PETRI_TRANSITIONS=98} [2023-11-19 08:04:23,751 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2023-11-19 08:04:23,751 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 98 transitions, 647 flow [2023-11-19 08:04:23,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:23,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:23,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:23,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:23,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:04:23,967 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:23,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:23,968 INFO L85 PathProgramCache]: Analyzing trace with hash 216235441, now seen corresponding path program 1 times [2023-11-19 08:04:23,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:23,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099272294] [2023-11-19 08:04:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:23,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:24,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:24,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099272294] [2023-11-19 08:04:24,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099272294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:24,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:24,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:04:24,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922130353] [2023-11-19 08:04:24,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:24,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:24,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:24,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:24,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:24,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 517 [2023-11-19 08:04:24,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 98 transitions, 647 flow. Second operand has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:24,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:24,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 517 [2023-11-19 08:04:24,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:25,239 INFO L124 PetriNetUnfolderBase]: 5687/7725 cut-off events. [2023-11-19 08:04:25,239 INFO L125 PetriNetUnfolderBase]: For 16592/16592 co-relation queries the response was YES. [2023-11-19 08:04:25,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25498 conditions, 7725 events. 5687/7725 cut-off events. For 16592/16592 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33434 event pairs, 1025 based on Foata normal form. 152/5589 useless extension candidates. Maximal degree in co-relation 25350. Up to 6177 conditions per place. [2023-11-19 08:04:25,284 INFO L140 encePairwiseOnDemand]: 507/517 looper letters, 117 selfloop transitions, 5 changer transitions 2/124 dead transitions. [2023-11-19 08:04:25,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 124 transitions, 1047 flow [2023-11-19 08:04:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2023-11-19 08:04:25,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47195357833655704 [2023-11-19 08:04:25,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2023-11-19 08:04:25,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2023-11-19 08:04:25,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:25,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2023-11-19 08:04:25,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:25,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:25,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:25,296 INFO L175 Difference]: Start difference. First operand has 81 places, 98 transitions, 647 flow. Second operand 3 states and 732 transitions. [2023-11-19 08:04:25,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 124 transitions, 1047 flow [2023-11-19 08:04:25,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 124 transitions, 1023 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:04:25,334 INFO L231 Difference]: Finished difference. Result has 82 places, 100 transitions, 657 flow [2023-11-19 08:04:25,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=657, PETRI_PLACES=82, PETRI_TRANSITIONS=100} [2023-11-19 08:04:25,335 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 32 predicate places. [2023-11-19 08:04:25,335 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 100 transitions, 657 flow [2023-11-19 08:04:25,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:25,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:25,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:25,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 08:04:25,336 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:25,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:25,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1725771563, now seen corresponding path program 1 times [2023-11-19 08:04:25,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:25,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044678731] [2023-11-19 08:04:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:25,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:25,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:25,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044678731] [2023-11-19 08:04:25,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044678731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:25,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:25,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:04:25,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26879008] [2023-11-19 08:04:25,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:25,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:25,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:25,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:25,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:25,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 517 [2023-11-19 08:04:25,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 100 transitions, 657 flow. Second operand has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:25,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:25,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 517 [2023-11-19 08:04:25,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:26,269 INFO L124 PetriNetUnfolderBase]: 4485/6139 cut-off events. [2023-11-19 08:04:26,269 INFO L125 PetriNetUnfolderBase]: For 11390/11390 co-relation queries the response was YES. [2023-11-19 08:04:26,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21381 conditions, 6139 events. 4485/6139 cut-off events. For 11390/11390 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 26270 event pairs, 1249 based on Foata normal form. 24/4659 useless extension candidates. Maximal degree in co-relation 21232. Up to 5885 conditions per place. [2023-11-19 08:04:26,298 INFO L140 encePairwiseOnDemand]: 513/517 looper letters, 102 selfloop transitions, 5 changer transitions 0/107 dead transitions. [2023-11-19 08:04:26,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 888 flow [2023-11-19 08:04:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:26,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2023-11-19 08:04:26,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46486137975499675 [2023-11-19 08:04:26,302 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2023-11-19 08:04:26,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2023-11-19 08:04:26,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:26,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2023-11-19 08:04:26,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:26,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:26,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:26,316 INFO L175 Difference]: Start difference. First operand has 82 places, 100 transitions, 657 flow. Second operand 3 states and 721 transitions. [2023-11-19 08:04:26,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 888 flow [2023-11-19 08:04:26,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 107 transitions, 879 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:26,356 INFO L231 Difference]: Finished difference. Result has 84 places, 100 transitions, 665 flow [2023-11-19 08:04:26,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=665, PETRI_PLACES=84, PETRI_TRANSITIONS=100} [2023-11-19 08:04:26,357 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2023-11-19 08:04:26,357 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 100 transitions, 665 flow [2023-11-19 08:04:26,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:26,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:26,358 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:26,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 08:04:26,358 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:26,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1070723649, now seen corresponding path program 2 times [2023-11-19 08:04:26,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:26,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585912664] [2023-11-19 08:04:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:26,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:26,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:26,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585912664] [2023-11-19 08:04:26,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585912664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:26,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091495182] [2023-11-19 08:04:26,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:04:26,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:26,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:26,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:26,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:04:26,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 08:04:26,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:26,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:04:26,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 08:04:26,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:26,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091495182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:26,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:04:26,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-11-19 08:04:26,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385101956] [2023-11-19 08:04:26,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:26,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:26,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:26,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:26,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:04:26,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 517 [2023-11-19 08:04:26,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 100 transitions, 665 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:26,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:26,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 517 [2023-11-19 08:04:26,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:27,442 INFO L124 PetriNetUnfolderBase]: 3941/5375 cut-off events. [2023-11-19 08:04:27,442 INFO L125 PetriNetUnfolderBase]: For 12252/12252 co-relation queries the response was YES. [2023-11-19 08:04:27,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18389 conditions, 5375 events. 3941/5375 cut-off events. For 12252/12252 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 22144 event pairs, 1997 based on Foata normal form. 220/4307 useless extension candidates. Maximal degree in co-relation 18239. Up to 5375 conditions per place. [2023-11-19 08:04:27,471 INFO L140 encePairwiseOnDemand]: 515/517 looper letters, 98 selfloop transitions, 1 changer transitions 0/99 dead transitions. [2023-11-19 08:04:27,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 851 flow [2023-11-19 08:04:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 717 transitions. [2023-11-19 08:04:27,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622823984526112 [2023-11-19 08:04:27,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 717 transitions. [2023-11-19 08:04:27,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 717 transitions. [2023-11-19 08:04:27,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:27,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 717 transitions. [2023-11-19 08:04:27,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:27,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:27,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:27,483 INFO L175 Difference]: Start difference. First operand has 84 places, 100 transitions, 665 flow. Second operand 3 states and 717 transitions. [2023-11-19 08:04:27,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 851 flow [2023-11-19 08:04:27,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 99 transitions, 822 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-19 08:04:27,511 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 626 flow [2023-11-19 08:04:27,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=626, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2023-11-19 08:04:27,512 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 29 predicate places. [2023-11-19 08:04:27,513 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 626 flow [2023-11-19 08:04:27,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:27,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:27,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:27,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:27,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 08:04:27,727 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:27,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1582159928, now seen corresponding path program 1 times [2023-11-19 08:04:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:27,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914701142] [2023-11-19 08:04:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:27,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:27,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914701142] [2023-11-19 08:04:27,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914701142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:27,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:27,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973280641] [2023-11-19 08:04:27,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:27,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:27,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:27,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:27,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:27,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 517 [2023-11-19 08:04:27,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 626 flow. Second operand has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:27,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:27,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 517 [2023-11-19 08:04:27,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:29,223 INFO L124 PetriNetUnfolderBase]: 4517/6233 cut-off events. [2023-11-19 08:04:29,223 INFO L125 PetriNetUnfolderBase]: For 7703/7703 co-relation queries the response was YES. [2023-11-19 08:04:29,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19201 conditions, 6233 events. 4517/6233 cut-off events. For 7703/7703 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26570 event pairs, 2375 based on Foata normal form. 136/5081 useless extension candidates. Maximal degree in co-relation 19174. Up to 5363 conditions per place. [2023-11-19 08:04:29,276 INFO L140 encePairwiseOnDemand]: 509/517 looper letters, 84 selfloop transitions, 13 changer transitions 26/123 dead transitions. [2023-11-19 08:04:29,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 123 transitions, 983 flow [2023-11-19 08:04:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:04:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:04:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 917 transitions. [2023-11-19 08:04:29,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434235976789168 [2023-11-19 08:04:29,282 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 917 transitions. [2023-11-19 08:04:29,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 917 transitions. [2023-11-19 08:04:29,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:29,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 917 transitions. [2023-11-19 08:04:29,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:29,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:29,294 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:29,294 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 626 flow. Second operand 4 states and 917 transitions. [2023-11-19 08:04:29,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 123 transitions, 983 flow [2023-11-19 08:04:29,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 123 transitions, 982 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:29,333 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 642 flow [2023-11-19 08:04:29,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=642, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2023-11-19 08:04:29,334 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 32 predicate places. [2023-11-19 08:04:29,334 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 642 flow [2023-11-19 08:04:29,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:29,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:29,336 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-19 08:04:29,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 08:04:29,336 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:29,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash -724281703, now seen corresponding path program 2 times [2023-11-19 08:04:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:29,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334875506] [2023-11-19 08:04:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:29,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334875506] [2023-11-19 08:04:29,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334875506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930982433] [2023-11-19 08:04:29,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:04:29,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:29,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:29,616 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:29,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:04:29,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 08:04:29,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:29,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:04:29,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 08:04:29,801 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:29,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930982433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:29,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:04:29,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-11-19 08:04:29,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455422671] [2023-11-19 08:04:29,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:29,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:29,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:29,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:29,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:04:29,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 517 [2023-11-19 08:04:29,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 642 flow. Second operand has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:29,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:29,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 517 [2023-11-19 08:04:29,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:30,592 INFO L124 PetriNetUnfolderBase]: 2945/4020 cut-off events. [2023-11-19 08:04:30,592 INFO L125 PetriNetUnfolderBase]: For 5057/5057 co-relation queries the response was YES. [2023-11-19 08:04:30,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12843 conditions, 4020 events. 2945/4020 cut-off events. For 5057/5057 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15530 event pairs, 1423 based on Foata normal form. 211/3235 useless extension candidates. Maximal degree in co-relation 12815. Up to 3964 conditions per place. [2023-11-19 08:04:30,613 INFO L140 encePairwiseOnDemand]: 512/517 looper letters, 70 selfloop transitions, 21 changer transitions 3/94 dead transitions. [2023-11-19 08:04:30,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 94 transitions, 800 flow [2023-11-19 08:04:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:04:30,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:04:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 920 transitions. [2023-11-19 08:04:30,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448742746615087 [2023-11-19 08:04:30,617 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 920 transitions. [2023-11-19 08:04:30,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 920 transitions. [2023-11-19 08:04:30,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:30,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 920 transitions. [2023-11-19 08:04:30,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:30,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:30,626 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:30,627 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 642 flow. Second operand 4 states and 920 transitions. [2023-11-19 08:04:30,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 94 transitions, 800 flow [2023-11-19 08:04:30,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 675 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-11-19 08:04:30,642 INFO L231 Difference]: Finished difference. Result has 68 places, 91 transitions, 508 flow [2023-11-19 08:04:30,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=508, PETRI_PLACES=68, PETRI_TRANSITIONS=91} [2023-11-19 08:04:30,643 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2023-11-19 08:04:30,644 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 91 transitions, 508 flow [2023-11-19 08:04:30,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:30,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:30,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:30,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:30,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:30,859 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:30,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:30,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1914441118, now seen corresponding path program 1 times [2023-11-19 08:04:30,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:30,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486908765] [2023-11-19 08:04:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:30,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:31,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:31,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486908765] [2023-11-19 08:04:31,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486908765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:31,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532134893] [2023-11-19 08:04:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:31,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:31,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:31,424 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:31,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:04:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:31,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 08:04:31,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:31,634 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:31,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2023-11-19 08:04:31,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 08:04:31,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 08:04:31,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-19 08:04:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 08:04:31,782 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:31,788 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:31,797 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:31,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 08:04:31,826 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 08:04:31,853 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:31,860 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:31,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:31,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 08:04:31,886 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:31,892 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:31,902 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:31,908 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:31,918 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:31,924 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 08:04:32,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-19 08:04:32,076 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 08:04:32,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-11-19 08:04:32,137 INFO L378 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 8 treesize of output 1 [2023-11-19 08:04:32,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 08:04:32,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 08:04:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:32,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:32,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:32,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2023-11-19 08:04:33,027 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 08:04:33,028 INFO L378 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 5292 treesize of output 5039 [2023-11-19 08:04:33,088 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 08:04:33,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 206 [2023-11-19 08:04:33,110 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 08:04:33,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 182 [2023-11-19 08:04:33,136 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 08:04:33,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 205 treesize of output 157 [2023-11-19 08:04:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:33,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532134893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:33,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:33,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-11-19 08:04:33,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247707422] [2023-11-19 08:04:33,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:33,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 08:04:33,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:33,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 08:04:33,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=517, Unknown=11, NotChecked=0, Total=650 [2023-11-19 08:04:35,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 517 [2023-11-19 08:04:35,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 91 transitions, 508 flow. Second operand has 26 states, 26 states have (on average 160.5) internal successors, (4173), 26 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:35,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:35,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 517 [2023-11-19 08:04:35,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:39,388 INFO L124 PetriNetUnfolderBase]: 5288/7376 cut-off events. [2023-11-19 08:04:39,388 INFO L125 PetriNetUnfolderBase]: For 6728/6728 co-relation queries the response was YES. [2023-11-19 08:04:39,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22317 conditions, 7376 events. 5288/7376 cut-off events. For 6728/6728 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34918 event pairs, 550 based on Foata normal form. 0/5356 useless extension candidates. Maximal degree in co-relation 22300. Up to 2749 conditions per place. [2023-11-19 08:04:39,424 INFO L140 encePairwiseOnDemand]: 502/517 looper letters, 288 selfloop transitions, 95 changer transitions 3/386 dead transitions. [2023-11-19 08:04:39,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 386 transitions, 2362 flow [2023-11-19 08:04:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-19 08:04:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-19 08:04:39,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5230 transitions. [2023-11-19 08:04:39,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3263243276970113 [2023-11-19 08:04:39,444 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5230 transitions. [2023-11-19 08:04:39,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5230 transitions. [2023-11-19 08:04:39,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:39,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5230 transitions. [2023-11-19 08:04:39,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 168.70967741935485) internal successors, (5230), 31 states have internal predecessors, (5230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:39,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 517.0) internal successors, (16544), 32 states have internal predecessors, (16544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:39,491 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 517.0) internal successors, (16544), 32 states have internal predecessors, (16544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:39,491 INFO L175 Difference]: Start difference. First operand has 68 places, 91 transitions, 508 flow. Second operand 31 states and 5230 transitions. [2023-11-19 08:04:39,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 386 transitions, 2362 flow [2023-11-19 08:04:39,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 386 transitions, 2318 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-19 08:04:39,559 INFO L231 Difference]: Finished difference. Result has 107 places, 179 transitions, 1239 flow [2023-11-19 08:04:39,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1239, PETRI_PLACES=107, PETRI_TRANSITIONS=179} [2023-11-19 08:04:39,560 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 57 predicate places. [2023-11-19 08:04:39,560 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 179 transitions, 1239 flow [2023-11-19 08:04:39,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 160.5) internal successors, (4173), 26 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:39,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:39,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:39,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:39,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:39,775 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-19 08:04:39,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1913845209, now seen corresponding path program 1 times [2023-11-19 08:04:39,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:39,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838920433] [2023-11-19 08:04:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:39,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:40,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:40,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838920433] [2023-11-19 08:04:40,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838920433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:40,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976078924] [2023-11-19 08:04:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:40,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:40,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:40,200 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:40,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf2a4c1-a4e1-49c7-b1bb-42e528441bcf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:04:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:40,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 08:04:40,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:40,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-19 08:04:40,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:40,477 INFO L378 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 [2023-11-19 08:04:40,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:40,540 INFO L378 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 [2023-11-19 08:04:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:40,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:40,837 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_468 (Array Int Int)) (~q2_back~0 Int)) (or (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_468) c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))) 2147483648) (< c_~n2~0 (+ ~q2_back~0 1)) (< ~q2_back~0 0))) is different from false [2023-11-19 08:04:40,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:40,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-11-19 08:04:40,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:40,948 INFO L378 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 157 treesize of output 141 [2023-11-19 08:04:40,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-11-19 08:04:40,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-11-19 08:04:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:41,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976078924] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:41,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:41,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-19 08:04:41,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80575749] [2023-11-19 08:04:41,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:41,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 08:04:41,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:41,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 08:04:41,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=296, Unknown=1, NotChecked=34, Total=380 [2023-11-19 08:04:41,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 517 [2023-11-19 08:04:41,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 179 transitions, 1239 flow. Second operand has 20 states, 20 states have (on average 159.95) internal successors, (3199), 20 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:41,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:41,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 517 [2023-11-19 08:04:41,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand