./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/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_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/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_73302d13-73c5-4293-a9e7-5160ce36ae1b/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 1ac00c9540bbc99a446c9cb6c02e180c3a0ad4fef3c182d14bafdc7ea871c54c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:06:07,618 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:06:07,750 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 08:06:07,759 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:06:07,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:06:07,803 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:06:07,804 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:06:07,805 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:06:07,806 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:06:07,810 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:06:07,811 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:06:07,812 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:06:07,812 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:06:07,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:06:07,814 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:06:07,815 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:06:07,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:06:07,815 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:06:07,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:06:07,816 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:06:07,816 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:06:07,817 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:06:07,817 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 08:06:07,818 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:06:07,818 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:06:07,818 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:06:07,819 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:06:07,820 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:06:07,820 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:06:07,820 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:06:07,822 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:06:07,822 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:06:07,822 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:06:07,822 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:06:07,822 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:06:07,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:06:07,823 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:06:07,823 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:06:07,823 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:06:07,823 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:06:07,824 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:06:07,824 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_73302d13-73c5-4293-a9e7-5160ce36ae1b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ac00c9540bbc99a446c9cb6c02e180c3a0ad4fef3c182d14bafdc7ea871c54c [2023-11-19 08:06:08,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:06:08,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:06:08,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:06:08,207 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:06:08,208 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:06:08,209 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2023-11-19 08:06:11,385 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:06:11,588 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:06:11,589 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2023-11-19 08:06:11,598 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/data/5c745348e/bfc49d4350c44b0591959726fdfe22df/FLAG00cc3f298 [2023-11-19 08:06:11,613 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/data/5c745348e/bfc49d4350c44b0591959726fdfe22df [2023-11-19 08:06:11,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:06:11,617 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:06:11,618 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:06:11,619 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:06:11,624 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:06:11,625 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,626 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3585def5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11, skipping insertion in model container [2023-11-19 08:06:11,627 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,653 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:06:11,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:06:11,852 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:06:11,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:06:11,887 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:06:11,887 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:06:11,896 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:06:11,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11 WrapperNode [2023-11-19 08:06:11,896 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:06:11,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:06:11,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:06:11,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:06:11,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,915 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,943 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2023-11-19 08:06:11,944 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:06:11,945 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:06:11,945 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:06:11,945 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:06:11,955 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,958 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,970 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,974 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,976 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,977 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,981 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:06:11,982 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:06:11,982 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:06:11,982 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:06:11,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11" (1/1) ... [2023-11-19 08:06:11,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:06:12,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:12,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:12,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:06:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:06:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:06:12,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:06:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:06:12,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:06:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 08:06:12,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 08:06:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:06:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:06:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:06:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:06:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:06:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:06:12,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:06:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:06:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:06:12,067 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 08:06:12,171 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:06:12,173 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:06:12,478 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:06:12,555 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:06:12,555 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 08:06:12,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:12 BoogieIcfgContainer [2023-11-19 08:06:12,561 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:06:12,563 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:06:12,564 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:06:12,567 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:06:12,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:06:11" (1/3) ... [2023-11-19 08:06:12,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3139349e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:06:12, skipping insertion in model container [2023-11-19 08:06:12,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:11" (2/3) ... [2023-11-19 08:06:12,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3139349e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:06:12, skipping insertion in model container [2023-11-19 08:06:12,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:12" (3/3) ... [2023-11-19 08:06:12,570 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2023-11-19 08:06:12,579 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:06:12,587 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:06:12,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-19 08:06:12,588 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:06:12,684 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 08:06:12,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 311 flow [2023-11-19 08:06:12,808 INFO L124 PetriNetUnfolderBase]: 16/142 cut-off events. [2023-11-19 08:06:12,808 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:06:12,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 142 events. 16/142 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 238 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2023-11-19 08:06:12,822 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 145 transitions, 311 flow [2023-11-19 08:06:12,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 118 transitions, 251 flow [2023-11-19 08:06:12,835 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:06:12,845 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 118 transitions, 251 flow [2023-11-19 08:06:12,848 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 118 transitions, 251 flow [2023-11-19 08:06:12,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 118 transitions, 251 flow [2023-11-19 08:06:12,886 INFO L124 PetriNetUnfolderBase]: 15/118 cut-off events. [2023-11-19 08:06:12,886 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:06:12,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 118 events. 15/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 236 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2023-11-19 08:06:12,893 INFO L119 LiptonReduction]: Number of co-enabled transitions 4830 [2023-11-19 08:06:18,252 INFO L134 LiptonReduction]: Checked pairs total: 5019 [2023-11-19 08:06:18,252 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-11-19 08:06:18,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:06:18,274 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;@48a3d33a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:06:18,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-11-19 08:06:18,278 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:06:18,278 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-11-19 08:06:18,279 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:06:18,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:18,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:06:18,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-19 08:06:18,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash 19392776, now seen corresponding path program 1 times [2023-11-19 08:06:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:18,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41387412] [2023-11-19 08:06:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:18,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:18,579 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 08:06:18,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:18,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41387412] [2023-11-19 08:06:18,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41387412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:18,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:18,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:06:18,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685277436] [2023-11-19 08:06:18,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:18,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:18,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:18,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:18,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:18,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 263 [2023-11-19 08:06:18,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 08:06:18,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:18,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 263 [2023-11-19 08:06:18,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:19,414 INFO L124 PetriNetUnfolderBase]: 3915/4867 cut-off events. [2023-11-19 08:06:19,414 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-11-19 08:06:19,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9916 conditions, 4867 events. 3915/4867 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 18150 event pairs, 815 based on Foata normal form. 0/1340 useless extension candidates. Maximal degree in co-relation 8835. Up to 4783 conditions per place. [2023-11-19 08:06:19,476 INFO L140 encePairwiseOnDemand]: 247/263 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-11-19 08:06:19,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 209 flow [2023-11-19 08:06:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:06:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-11-19 08:06:19,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082382762991128 [2023-11-19 08:06:19,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-11-19 08:06:19,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-11-19 08:06:19,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:19,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-11-19 08:06:19,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 08:06:19,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 08:06:19,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 08:06:19,523 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 79 flow. Second operand 3 states and 401 transitions. [2023-11-19 08:06:19,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 209 flow [2023-11-19 08:06:19,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 193 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-19 08:06:19,533 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 118 flow [2023-11-19 08:06:19,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-11-19 08:06:19,541 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-11-19 08:06:19,541 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 118 flow [2023-11-19 08:06:19,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 08:06:19,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:19,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:06:19,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:06:19,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-19 08:06:19,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:19,544 INFO L85 PathProgramCache]: Analyzing trace with hash 601177618, now seen corresponding path program 1 times [2023-11-19 08:06:19,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:19,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250356001] [2023-11-19 08:06:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:19,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:19,859 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 08:06:19,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:19,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250356001] [2023-11-19 08:06:19,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250356001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:19,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708692197] [2023-11-19 08:06:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:19,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:19,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:19,865 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:19,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:06:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:19,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:06:19,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:20,365 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 08:06:20,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:20,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708692197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:20,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:20,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 08:06:20,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21634323] [2023-11-19 08:06:20,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:20,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:06:20,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:20,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:06:20,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:06:20,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 263 [2023-11-19 08:06:20,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 118 flow. Second operand has 8 states, 8 states have (on average 109.5) internal successors, (876), 8 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 08:06:20,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:20,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 263 [2023-11-19 08:06:20,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:22,404 INFO L124 PetriNetUnfolderBase]: 8348/10846 cut-off events. [2023-11-19 08:06:22,404 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2023-11-19 08:06:22,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29430 conditions, 10846 events. 8348/10846 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 52161 event pairs, 297 based on Foata normal form. 0/5160 useless extension candidates. Maximal degree in co-relation 20977. Up to 7489 conditions per place. [2023-11-19 08:06:22,510 INFO L140 encePairwiseOnDemand]: 247/263 looper letters, 90 selfloop transitions, 37 changer transitions 0/130 dead transitions. [2023-11-19 08:06:22,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 130 transitions, 669 flow [2023-11-19 08:06:22,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:06:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 08:06:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1008 transitions. [2023-11-19 08:06:22,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790874524714829 [2023-11-19 08:06:22,516 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1008 transitions. [2023-11-19 08:06:22,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1008 transitions. [2023-11-19 08:06:22,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:22,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1008 transitions. [2023-11-19 08:06:22,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 08:06:22,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 263.0) internal successors, (2367), 9 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states 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 08:06:22,528 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 263.0) internal successors, (2367), 9 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states 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 08:06:22,529 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 118 flow. Second operand 8 states and 1008 transitions. [2023-11-19 08:06:22,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 130 transitions, 669 flow [2023-11-19 08:06:22,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 130 transitions, 665 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:22,534 INFO L231 Difference]: Finished difference. Result has 47 places, 72 transitions, 451 flow [2023-11-19 08:06:22,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=451, PETRI_PLACES=47, PETRI_TRANSITIONS=72} [2023-11-19 08:06:22,535 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 8 predicate places. [2023-11-19 08:06:22,535 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 72 transitions, 451 flow [2023-11-19 08:06:22,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 109.5) internal successors, (876), 8 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 08:06:22,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:22,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:06:22,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:22,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:22,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-19 08:06:22,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash 601177614, now seen corresponding path program 1 times [2023-11-19 08:06:22,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:22,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737368777] [2023-11-19 08:06:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:22,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:22,848 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 08:06:22,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:22,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737368777] [2023-11-19 08:06:22,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737368777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:22,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485604752] [2023-11-19 08:06:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:22,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:22,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:22,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:22,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:06:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:22,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:06:22,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:23,207 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 08:06:23,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:23,280 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 08:06:23,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485604752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:23,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:23,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 08:06:23,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517035146] [2023-11-19 08:06:23,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:23,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:06:23,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:23,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:06:23,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:06:23,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 263 [2023-11-19 08:06:23,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 72 transitions, 451 flow. Second operand has 8 states, 8 states have (on average 109.5) internal successors, (876), 8 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 08:06:23,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:23,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 263 [2023-11-19 08:06:23,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:25,656 INFO L124 PetriNetUnfolderBase]: 9931/13449 cut-off events. [2023-11-19 08:06:25,657 INFO L125 PetriNetUnfolderBase]: For 13252/13252 co-relation queries the response was YES. [2023-11-19 08:06:25,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51064 conditions, 13449 events. 9931/13449 cut-off events. For 13252/13252 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 73560 event pairs, 105 based on Foata normal form. 824/12869 useless extension candidates. Maximal degree in co-relation 36825. Up to 8741 conditions per place. [2023-11-19 08:06:25,769 INFO L140 encePairwiseOnDemand]: 247/263 looper letters, 141 selfloop transitions, 71 changer transitions 0/215 dead transitions. [2023-11-19 08:06:25,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 215 transitions, 1568 flow [2023-11-19 08:06:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:06:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 08:06:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1251 transitions. [2023-11-19 08:06:25,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756653992395437 [2023-11-19 08:06:25,777 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1251 transitions. [2023-11-19 08:06:25,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1251 transitions. [2023-11-19 08:06:25,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:25,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1251 transitions. [2023-11-19 08:06:25,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 125.1) internal successors, (1251), 10 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states 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 08:06:25,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 263.0) internal successors, (2893), 11 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states 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 08:06:25,791 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 263.0) internal successors, (2893), 11 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states 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 08:06:25,792 INFO L175 Difference]: Start difference. First operand has 47 places, 72 transitions, 451 flow. Second operand 10 states and 1251 transitions. [2023-11-19 08:06:25,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 215 transitions, 1568 flow [2023-11-19 08:06:26,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 215 transitions, 1491 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-11-19 08:06:26,019 INFO L231 Difference]: Finished difference. Result has 61 places, 128 transitions, 1204 flow [2023-11-19 08:06:26,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1204, PETRI_PLACES=61, PETRI_TRANSITIONS=128} [2023-11-19 08:06:26,020 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 22 predicate places. [2023-11-19 08:06:26,021 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 128 transitions, 1204 flow [2023-11-19 08:06:26,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 109.5) internal successors, (876), 8 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 08:06:26,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:26,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:26,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 08:06:26,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:26,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-19 08:06:26,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:26,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2092553680, now seen corresponding path program 1 times [2023-11-19 08:06:26,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:26,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935529295] [2023-11-19 08:06:26,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:26,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:26,494 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 08:06:26,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:26,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935529295] [2023-11-19 08:06:26,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935529295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:26,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412501683] [2023-11-19 08:06:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:26,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:26,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:26,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:26,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:06:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:26,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:06:26,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:26,678 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 08:06:26,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:26,735 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 08:06:26,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412501683] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:26,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:26,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 8 [2023-11-19 08:06:26,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210945272] [2023-11-19 08:06:26,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:26,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:26,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:26,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:26,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:06:26,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 263 [2023-11-19 08:06:26,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 128 transitions, 1204 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 08:06:26,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:26,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 263 [2023-11-19 08:06:26,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:28,273 INFO L124 PetriNetUnfolderBase]: 6438/8745 cut-off events. [2023-11-19 08:06:28,273 INFO L125 PetriNetUnfolderBase]: For 38172/38172 co-relation queries the response was YES. [2023-11-19 08:06:28,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39259 conditions, 8745 events. 6438/8745 cut-off events. For 38172/38172 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 45520 event pairs, 2102 based on Foata normal form. 1149/9864 useless extension candidates. Maximal degree in co-relation 38518. Up to 8725 conditions per place. [2023-11-19 08:06:28,362 INFO L140 encePairwiseOnDemand]: 259/263 looper letters, 104 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-11-19 08:06:28,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 108 transitions, 1183 flow [2023-11-19 08:06:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:06:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-11-19 08:06:28,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740177439797212 [2023-11-19 08:06:28,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-11-19 08:06:28,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-11-19 08:06:28,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:28,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-11-19 08:06:28,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 08:06:28,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 08:06:28,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 08:06:28,375 INFO L175 Difference]: Start difference. First operand has 61 places, 128 transitions, 1204 flow. Second operand 3 states and 374 transitions. [2023-11-19 08:06:28,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 108 transitions, 1183 flow [2023-11-19 08:06:28,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 108 transitions, 1166 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-19 08:06:28,751 INFO L231 Difference]: Finished difference. Result has 58 places, 108 transitions, 958 flow [2023-11-19 08:06:28,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=958, PETRI_PLACES=58, PETRI_TRANSITIONS=108} [2023-11-19 08:06:28,754 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2023-11-19 08:06:28,754 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 108 transitions, 958 flow [2023-11-19 08:06:28,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 08:06:28,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:28,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:28,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 08:06:28,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:28,974 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-19 08:06:28,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:28,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1865113356, now seen corresponding path program 1 times [2023-11-19 08:06:28,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:28,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191813756] [2023-11-19 08:06:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:28,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:29,035 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 08:06:29,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:29,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191813756] [2023-11-19 08:06:29,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191813756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:29,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:29,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:06:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866602164] [2023-11-19 08:06:29,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:29,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:29,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:29,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 263 [2023-11-19 08:06:29,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 108 transitions, 958 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:29,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:29,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 263 [2023-11-19 08:06:29,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:30,650 INFO L124 PetriNetUnfolderBase]: 7443/10431 cut-off events. [2023-11-19 08:06:30,651 INFO L125 PetriNetUnfolderBase]: For 30462/30462 co-relation queries the response was YES. [2023-11-19 08:06:30,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45001 conditions, 10431 events. 7443/10431 cut-off events. For 30462/30462 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 59863 event pairs, 1729 based on Foata normal form. 290/10705 useless extension candidates. Maximal degree in co-relation 44982. Up to 6571 conditions per place. [2023-11-19 08:06:30,752 INFO L140 encePairwiseOnDemand]: 259/263 looper letters, 157 selfloop transitions, 13 changer transitions 0/173 dead transitions. [2023-11-19 08:06:30,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 173 transitions, 1853 flow [2023-11-19 08:06:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:06:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-11-19 08:06:30,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48542458808618505 [2023-11-19 08:06:30,755 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-11-19 08:06:30,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-11-19 08:06:30,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:30,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-11-19 08:06:30,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states 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 08:06:30,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 08:06:30,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 08:06:30,760 INFO L175 Difference]: Start difference. First operand has 58 places, 108 transitions, 958 flow. Second operand 3 states and 383 transitions. [2023-11-19 08:06:30,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 173 transitions, 1853 flow [2023-11-19 08:06:31,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 173 transitions, 1852 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:31,226 INFO L231 Difference]: Finished difference. Result has 60 places, 116 transitions, 1111 flow [2023-11-19 08:06:31,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1111, PETRI_PLACES=60, PETRI_TRANSITIONS=116} [2023-11-19 08:06:31,229 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 21 predicate places. [2023-11-19 08:06:31,230 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 116 transitions, 1111 flow [2023-11-19 08:06:31,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:31,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:31,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:31,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:06:31,231 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-19 08:06:31,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:31,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1928195719, now seen corresponding path program 1 times [2023-11-19 08:06:31,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:31,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116882480] [2023-11-19 08:06:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:31,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:31,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:31,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116882480] [2023-11-19 08:06:31,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116882480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:31,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635299818] [2023-11-19 08:06:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:31,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:31,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:31,340 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:31,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:06:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:31,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:06:31,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:31,493 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 08:06:31,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:31,756 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 08:06:31,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635299818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:31,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:31,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 08:06:31,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339521077] [2023-11-19 08:06:31,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:31,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:06:31,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:31,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:06:31,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:06:31,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 263 [2023-11-19 08:06:31,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 116 transitions, 1111 flow. Second operand has 8 states, 8 states have (on average 108.25) internal successors, (866), 8 states have internal predecessors, (866), 0 states have call successors, (0), 0 states 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 08:06:31,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:31,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 263 [2023-11-19 08:06:31,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:34,158 INFO L124 PetriNetUnfolderBase]: 7710/11104 cut-off events. [2023-11-19 08:06:34,158 INFO L125 PetriNetUnfolderBase]: For 35957/35957 co-relation queries the response was YES. [2023-11-19 08:06:34,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47827 conditions, 11104 events. 7710/11104 cut-off events. For 35957/35957 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 67402 event pairs, 141 based on Foata normal form. 1048/12148 useless extension candidates. Maximal degree in co-relation 47806. Up to 4715 conditions per place. [2023-11-19 08:06:34,273 INFO L140 encePairwiseOnDemand]: 249/263 looper letters, 150 selfloop transitions, 110 changer transitions 0/263 dead transitions. [2023-11-19 08:06:34,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 263 transitions, 2728 flow [2023-11-19 08:06:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:06:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 08:06:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 983 transitions. [2023-11-19 08:06:34,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46720532319391633 [2023-11-19 08:06:34,279 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 983 transitions. [2023-11-19 08:06:34,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 983 transitions. [2023-11-19 08:06:34,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:34,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 983 transitions. [2023-11-19 08:06:34,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.875) internal successors, (983), 8 states have internal predecessors, (983), 0 states have call successors, (0), 0 states 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 08:06:34,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 263.0) internal successors, (2367), 9 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states 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 08:06:34,290 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 263.0) internal successors, (2367), 9 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states 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 08:06:34,291 INFO L175 Difference]: Start difference. First operand has 60 places, 116 transitions, 1111 flow. Second operand 8 states and 983 transitions. [2023-11-19 08:06:34,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 263 transitions, 2728 flow [2023-11-19 08:06:34,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 263 transitions, 2690 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-19 08:06:34,884 INFO L231 Difference]: Finished difference. Result has 71 places, 187 transitions, 2357 flow [2023-11-19 08:06:34,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2357, PETRI_PLACES=71, PETRI_TRANSITIONS=187} [2023-11-19 08:06:34,888 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 32 predicate places. [2023-11-19 08:06:34,888 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 187 transitions, 2357 flow [2023-11-19 08:06:34,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.25) internal successors, (866), 8 states have internal predecessors, (866), 0 states have call successors, (0), 0 states 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 08:06:34,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:34,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:34,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:35,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:06:35,106 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-19 08:06:35,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:35,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1928195718, now seen corresponding path program 1 times [2023-11-19 08:06:35,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:35,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752774191] [2023-11-19 08:06:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:35,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:35,162 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 08:06:35,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:35,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752774191] [2023-11-19 08:06:35,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752774191] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:35,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395686633] [2023-11-19 08:06:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:35,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:35,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:35,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:35,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:06:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:35,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:06:35,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:35,290 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 08:06:35,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:35,503 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 08:06:35,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395686633] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:35,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:35,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 08:06:35,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512000732] [2023-11-19 08:06:35,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:35,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:06:35,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:35,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:06:35,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:06:35,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 263 [2023-11-19 08:06:35,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 187 transitions, 2357 flow. Second operand has 8 states, 8 states have (on average 106.25) internal successors, (850), 8 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 08:06:35,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:35,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 263 [2023-11-19 08:06:35,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:37,919 INFO L124 PetriNetUnfolderBase]: 8349/12101 cut-off events. [2023-11-19 08:06:37,919 INFO L125 PetriNetUnfolderBase]: For 67886/67886 co-relation queries the response was YES. [2023-11-19 08:06:37,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63199 conditions, 12101 events. 8349/12101 cut-off events. For 67886/67886 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 74153 event pairs, 348 based on Foata normal form. 842/12939 useless extension candidates. Maximal degree in co-relation 63172. Up to 4935 conditions per place. [2023-11-19 08:06:38,056 INFO L140 encePairwiseOnDemand]: 249/263 looper letters, 150 selfloop transitions, 158 changer transitions 0/311 dead transitions. [2023-11-19 08:06:38,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 311 transitions, 4133 flow [2023-11-19 08:06:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:06:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:06:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 845 transitions. [2023-11-19 08:06:38,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45898967952199893 [2023-11-19 08:06:38,062 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 845 transitions. [2023-11-19 08:06:38,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 845 transitions. [2023-11-19 08:06:38,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:38,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 845 transitions. [2023-11-19 08:06:38,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 120.71428571428571) internal successors, (845), 7 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 08:06:38,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 263.0) internal successors, (2104), 8 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states 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 08:06:38,072 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 263.0) internal successors, (2104), 8 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states 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 08:06:38,073 INFO L175 Difference]: Start difference. First operand has 71 places, 187 transitions, 2357 flow. Second operand 7 states and 845 transitions. [2023-11-19 08:06:38,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 311 transitions, 4133 flow [2023-11-19 08:06:38,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 311 transitions, 4057 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:38,522 INFO L231 Difference]: Finished difference. Result has 80 places, 248 transitions, 3853 flow [2023-11-19 08:06:38,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3853, PETRI_PLACES=80, PETRI_TRANSITIONS=248} [2023-11-19 08:06:38,524 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 41 predicate places. [2023-11-19 08:06:38,524 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 248 transitions, 3853 flow [2023-11-19 08:06:38,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 106.25) internal successors, (850), 8 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 08:06:38,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:38,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:38,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 08:06:38,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:06:38,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-19 08:06:38,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1989441297, now seen corresponding path program 1 times [2023-11-19 08:06:38,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:38,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389994992] [2023-11-19 08:06:38,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:38,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:38,976 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 08:06:38,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:38,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389994992] [2023-11-19 08:06:38,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389994992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:38,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413336124] [2023-11-19 08:06:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:38,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:38,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:38,982 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:39,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:06:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:39,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:06:39,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:39,190 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 08:06:39,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:39,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413336124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:39,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:06:39,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-11-19 08:06:39,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326681165] [2023-11-19 08:06:39,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:39,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:39,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:39,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:39,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:06:39,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 263 [2023-11-19 08:06:39,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 248 transitions, 3853 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 08:06:39,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:39,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 263 [2023-11-19 08:06:39,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:40,845 INFO L124 PetriNetUnfolderBase]: 5353/7906 cut-off events. [2023-11-19 08:06:40,845 INFO L125 PetriNetUnfolderBase]: For 83869/83885 co-relation queries the response was YES. [2023-11-19 08:06:40,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45401 conditions, 7906 events. 5353/7906 cut-off events. For 83869/83885 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 47293 event pairs, 2363 based on Foata normal form. 990/8886 useless extension candidates. Maximal degree in co-relation 45369. Up to 7888 conditions per place. [2023-11-19 08:06:40,918 INFO L140 encePairwiseOnDemand]: 259/263 looper letters, 185 selfloop transitions, 1 changer transitions 0/189 dead transitions. [2023-11-19 08:06:40,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 189 transitions, 3224 flow [2023-11-19 08:06:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:06:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-11-19 08:06:40,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47021546261089986 [2023-11-19 08:06:40,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-11-19 08:06:40,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-11-19 08:06:40,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:40,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-11-19 08:06:40,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:40,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 08:06:40,928 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 08:06:40,928 INFO L175 Difference]: Start difference. First operand has 80 places, 248 transitions, 3853 flow. Second operand 3 states and 371 transitions. [2023-11-19 08:06:40,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 189 transitions, 3224 flow [2023-11-19 08:06:41,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 189 transitions, 3174 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-11-19 08:06:41,206 INFO L231 Difference]: Finished difference. Result has 75 places, 189 transitions, 2804 flow [2023-11-19 08:06:41,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=2802, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2804, PETRI_PLACES=75, PETRI_TRANSITIONS=189} [2023-11-19 08:06:41,207 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 36 predicate places. [2023-11-19 08:06:41,207 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 189 transitions, 2804 flow [2023-11-19 08:06:41,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 08:06:41,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:41,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:41,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:41,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:06:41,422 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-19 08:06:41,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:41,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1983937653, now seen corresponding path program 1 times [2023-11-19 08:06:41,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:41,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632741045] [2023-11-19 08:06:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:41,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:41,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:41,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632741045] [2023-11-19 08:06:41,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632741045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:41,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203818773] [2023-11-19 08:06:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:41,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:41,794 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:41,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:06:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:41,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:06:41,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:42,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:06:42,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203818773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:42,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:42,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-19 08:06:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345622738] [2023-11-19 08:06:42,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:42,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:06:42,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:42,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:06:42,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:06:42,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 263 [2023-11-19 08:06:42,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 189 transitions, 2804 flow. Second operand has 14 states, 14 states have (on average 100.71428571428571) internal successors, (1410), 14 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states 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 08:06:42,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:42,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 263 [2023-11-19 08:06:42,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:47,119 INFO L124 PetriNetUnfolderBase]: 11908/17224 cut-off events. [2023-11-19 08:06:47,119 INFO L125 PetriNetUnfolderBase]: For 141541/141541 co-relation queries the response was YES. [2023-11-19 08:06:47,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99362 conditions, 17224 events. 11908/17224 cut-off events. For 141541/141541 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 107725 event pairs, 367 based on Foata normal form. 922/18142 useless extension candidates. Maximal degree in co-relation 99330. Up to 7191 conditions per place. [2023-11-19 08:06:47,340 INFO L140 encePairwiseOnDemand]: 252/263 looper letters, 298 selfloop transitions, 413 changer transitions 1/715 dead transitions. [2023-11-19 08:06:47,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 715 transitions, 10418 flow [2023-11-19 08:06:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 08:06:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 08:06:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2186 transitions. [2023-11-19 08:06:47,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4374624774864919 [2023-11-19 08:06:47,352 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2186 transitions. [2023-11-19 08:06:47,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2186 transitions. [2023-11-19 08:06:47,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:47,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2186 transitions. [2023-11-19 08:06:47,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 115.05263157894737) internal successors, (2186), 19 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states 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 08:06:47,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 263.0) internal successors, (5260), 20 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states 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 08:06:47,378 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 263.0) internal successors, (5260), 20 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states 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 08:06:47,378 INFO L175 Difference]: Start difference. First operand has 75 places, 189 transitions, 2804 flow. Second operand 19 states and 2186 transitions. [2023-11-19 08:06:47,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 715 transitions, 10418 flow [2023-11-19 08:06:48,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 715 transitions, 10417 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:06:48,521 INFO L231 Difference]: Finished difference. Result has 106 places, 505 transitions, 9707 flow [2023-11-19 08:06:48,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9707, PETRI_PLACES=106, PETRI_TRANSITIONS=505} [2023-11-19 08:06:48,523 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 67 predicate places. [2023-11-19 08:06:48,523 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 505 transitions, 9707 flow [2023-11-19 08:06:48,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 100.71428571428571) internal successors, (1410), 14 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states 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 08:06:48,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:48,524 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:48,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:48,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 08:06:48,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-11-19 08:06:48,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:48,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1502760744, now seen corresponding path program 1 times [2023-11-19 08:06:48,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:48,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194849636] [2023-11-19 08:06:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:48,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:06:48,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:48,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194849636] [2023-11-19 08:06:48,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194849636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:48,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995397377] [2023-11-19 08:06:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:48,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:48,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:48,944 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:48,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73302d13-73c5-4293-a9e7-5160ce36ae1b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:06:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:49,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:06:49,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:06:49,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:06:49,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995397377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:49,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:49,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-11-19 08:06:49,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313806423] [2023-11-19 08:06:49,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:49,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:06:49,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:49,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:06:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:06:49,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 263 [2023-11-19 08:06:49,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 505 transitions, 9707 flow. Second operand has 10 states, 10 states have (on average 106.3) internal successors, (1063), 10 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states 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 08:06:49,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:49,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 263 [2023-11-19 08:06:49,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:56,535 INFO L124 PetriNetUnfolderBase]: 14397/20913 cut-off events. [2023-11-19 08:06:56,536 INFO L125 PetriNetUnfolderBase]: For 233426/233426 co-relation queries the response was YES. [2023-11-19 08:06:56,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142621 conditions, 20913 events. 14397/20913 cut-off events. For 233426/233426 co-relation queries the response was YES. Maximal size of possible extension queue 1261. Compared 133858 event pairs, 580 based on Foata normal form. 856/21765 useless extension candidates. Maximal degree in co-relation 142574. Up to 8875 conditions per place. [2023-11-19 08:06:56,893 INFO L140 encePairwiseOnDemand]: 252/263 looper letters, 566 selfloop transitions, 429 changer transitions 0/998 dead transitions. [2023-11-19 08:06:56,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 998 transitions, 19883 flow [2023-11-19 08:06:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:06:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 08:06:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1303 transitions. [2023-11-19 08:06:56,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503975112340131 [2023-11-19 08:06:56,900 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1303 transitions. [2023-11-19 08:06:56,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1303 transitions. [2023-11-19 08:06:56,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:56,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1303 transitions. [2023-11-19 08:06:56,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 118.45454545454545) internal successors, (1303), 11 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states 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 08:06:56,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 263.0) internal successors, (3156), 12 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states 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 08:06:56,913 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 263.0) internal successors, (3156), 12 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states 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 08:06:56,913 INFO L175 Difference]: Start difference. First operand has 106 places, 505 transitions, 9707 flow. Second operand 11 states and 1303 transitions. [2023-11-19 08:06:56,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 998 transitions, 19883 flow