./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:26:58,774 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:26:58,919 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 22:26:58,930 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:26:58,934 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:26:58,981 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:26:58,983 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:26:58,984 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:26:58,986 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:26:58,992 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:26:58,993 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:26:58,994 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:26:58,995 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:26:58,997 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:26:58,998 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:26:58,998 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:26:58,999 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:26:58,999 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:26:59,000 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:26:59,001 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:26:59,002 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:26:59,002 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:26:59,003 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 22:26:59,003 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:26:59,004 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:26:59,004 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:26:59,005 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:26:59,006 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:26:59,007 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:26:59,007 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:26:59,009 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:26:59,009 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:26:59,010 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:26:59,010 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:26:59,010 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:26:59,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:26:59,011 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:26:59,011 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:26:59,012 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:26:59,012 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:26:59,012 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:26:59,013 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_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 [2023-11-06 22:26:59,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:26:59,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:26:59,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:26:59,439 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:26:59,440 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:26:59,442 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2023-11-06 22:27:03,002 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:27:03,248 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:27:03,249 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2023-11-06 22:27:03,260 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/data/4468abe20/cf39cddbc6664d4cb5cd0a86dc33ea52/FLAG4670116ea [2023-11-06 22:27:03,278 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/data/4468abe20/cf39cddbc6664d4cb5cd0a86dc33ea52 [2023-11-06 22:27:03,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:27:03,283 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:27:03,285 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:27:03,285 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:27:03,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:27:03,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,303 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a018326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03, skipping insertion in model container [2023-11-06 22:27:03,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,358 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:27:03,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:27:03,662 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:27:03,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:27:03,713 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:27:03,713 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:27:03,722 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:27:03,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03 WrapperNode [2023-11-06 22:27:03,723 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:27:03,724 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:27:03,724 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:27:03,724 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:27:03,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,745 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,792 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 282 [2023-11-06 22:27:03,793 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:27:03,794 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:27:03,794 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:27:03,794 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:27:03,811 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,811 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,818 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,818 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,832 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,838 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,841 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,844 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,850 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:27:03,851 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:27:03,851 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:27:03,851 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:27:03,852 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03" (1/1) ... [2023-11-06 22:27:03,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:27:03,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:03,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:27:03,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:27:03,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:27:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:27:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:27:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:27:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:27:03,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:27:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:27:03,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:27:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:27:03,990 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:27:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:27:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:27:03,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:27:03,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:27:03,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:27:03,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:27:03,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:27:03,997 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:27:04,137 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:27:04,139 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:27:04,832 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:27:05,223 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:27:05,223 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 22:27:05,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:27:05 BoogieIcfgContainer [2023-11-06 22:27:05,229 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:27:05,235 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:27:05,235 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:27:05,239 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:27:05,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:27:03" (1/3) ... [2023-11-06 22:27:05,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1368339b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:27:05, skipping insertion in model container [2023-11-06 22:27:05,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:03" (2/3) ... [2023-11-06 22:27:05,245 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1368339b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:27:05, skipping insertion in model container [2023-11-06 22:27:05,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:27:05" (3/3) ... [2023-11-06 22:27:05,248 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-11-06 22:27:05,259 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:27:05,271 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:27:05,271 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-06 22:27:05,272 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:27:05,400 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:27:05,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 259 transitions, 539 flow [2023-11-06 22:27:05,611 INFO L124 PetriNetUnfolderBase]: 18/256 cut-off events. [2023-11-06 22:27:05,611 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:27:05,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 256 events. 18/256 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 245 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 202. Up to 3 conditions per place. [2023-11-06 22:27:05,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 259 transitions, 539 flow [2023-11-06 22:27:05,631 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 233 transitions, 484 flow [2023-11-06 22:27:05,636 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:27:05,662 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 233 transitions, 484 flow [2023-11-06 22:27:05,667 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 233 transitions, 484 flow [2023-11-06 22:27:05,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 233 transitions, 484 flow [2023-11-06 22:27:05,755 INFO L124 PetriNetUnfolderBase]: 17/233 cut-off events. [2023-11-06 22:27:05,755 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:27:05,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 233 events. 17/233 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 241 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 202. Up to 3 conditions per place. [2023-11-06 22:27:05,764 INFO L119 LiptonReduction]: Number of co-enabled transitions 3544 [2023-11-06 22:27:18,155 INFO L134 LiptonReduction]: Checked pairs total: 8018 [2023-11-06 22:27:18,155 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-11-06 22:27:18,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:27:18,178 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@77beffcd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:27:18,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-11-06 22:27:18,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:27:18,182 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:27:18,182 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:27:18,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:18,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:27:18,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:18,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:18,189 INFO L85 PathProgramCache]: Analyzing trace with hash 37850, now seen corresponding path program 1 times [2023-11-06 22:27:18,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:18,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334900409] [2023-11-06 22:27:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:18,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:18,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:18,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334900409] [2023-11-06 22:27:18,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334900409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:18,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:27:18,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:27:18,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988042049] [2023-11-06 22:27:18,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:18,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:18,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:18,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:18,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:27:18,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 508 [2023-11-06 22:27:18,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:18,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:18,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 508 [2023-11-06 22:27:18,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:19,768 INFO L124 PetriNetUnfolderBase]: 3891/5031 cut-off events. [2023-11-06 22:27:19,769 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2023-11-06 22:27:19,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10262 conditions, 5031 events. 3891/5031 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 23085 event pairs, 2118 based on Foata normal form. 0/1553 useless extension candidates. Maximal degree in co-relation 9182. Up to 5001 conditions per place. [2023-11-06 22:27:19,818 INFO L140 encePairwiseOnDemand]: 493/508 looper letters, 43 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-11-06 22:27:19,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 51 transitions, 216 flow [2023-11-06 22:27:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:27:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 694 transitions. [2023-11-06 22:27:19,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553805774278215 [2023-11-06 22:27:19,838 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 694 transitions. [2023-11-06 22:27:19,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 694 transitions. [2023-11-06 22:27:19,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:19,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 694 transitions. [2023-11-06 22:27:19,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:19,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:19,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:19,865 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 124 flow. Second operand 3 states and 694 transitions. [2023-11-06 22:27:19,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 51 transitions, 216 flow [2023-11-06 22:27:19,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:27:19,876 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 144 flow [2023-11-06 22:27:19,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-11-06 22:27:19,883 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-11-06 22:27:19,883 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 144 flow [2023-11-06 22:27:19,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:19,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:19,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:27:19,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:27:19,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:19,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:19,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1175550, now seen corresponding path program 1 times [2023-11-06 22:27:19,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:19,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979474757] [2023-11-06 22:27:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:19,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:20,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:20,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979474757] [2023-11-06 22:27:20,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979474757] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:20,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777211166] [2023-11-06 22:27:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:20,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:20,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:20,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:20,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:27:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:20,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:27:20,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:20,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:27:20,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777211166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:20,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:27:20,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-06 22:27:20,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965541249] [2023-11-06 22:27:20,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:20,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:27:20,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:20,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:27:20,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:27:20,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 508 [2023-11-06 22:27:20,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 212.75) internal successors, (851), 4 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:20,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:20,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 508 [2023-11-06 22:27:20,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:21,285 INFO L124 PetriNetUnfolderBase]: 3891/5029 cut-off events. [2023-11-06 22:27:21,285 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 22:27:21,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10128 conditions, 5029 events. 3891/5029 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 22967 event pairs, 2118 based on Foata normal form. 0/1555 useless extension candidates. Maximal degree in co-relation 10086. Up to 4993 conditions per place. [2023-11-06 22:27:21,338 INFO L140 encePairwiseOnDemand]: 501/508 looper letters, 40 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-11-06 22:27:21,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 228 flow [2023-11-06 22:27:21,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:27:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:27:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 896 transitions. [2023-11-06 22:27:21,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409448818897638 [2023-11-06 22:27:21,344 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 896 transitions. [2023-11-06 22:27:21,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 896 transitions. [2023-11-06 22:27:21,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:21,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 896 transitions. [2023-11-06 22:27:21,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:21,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 508.0) internal successors, (2540), 5 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:21,357 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 508.0) internal successors, (2540), 5 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:21,357 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 144 flow. Second operand 4 states and 896 transitions. [2023-11-06 22:27:21,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 228 flow [2023-11-06 22:27:21,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:27:21,360 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 138 flow [2023-11-06 22:27:21,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-11-06 22:27:21,362 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2023-11-06 22:27:21,362 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 138 flow [2023-11-06 22:27:21,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.75) internal successors, (851), 4 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:21,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:21,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:27:21,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:21,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:21,580 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:21,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:21,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1175559, now seen corresponding path program 1 times [2023-11-06 22:27:21,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:21,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490816080] [2023-11-06 22:27:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:21,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:21,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:21,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490816080] [2023-11-06 22:27:21,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490816080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:21,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77434318] [2023-11-06 22:27:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:21,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:21,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:21,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:21,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:27:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:21,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:27:21,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:21,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:21,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77434318] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:21,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:27:21,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:27:21,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119658712] [2023-11-06 22:27:21,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:21,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:27:21,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:21,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:27:21,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:27:21,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 508 [2023-11-06 22:27:21,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 213.14285714285714) internal successors, (1492), 7 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:21,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:21,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 508 [2023-11-06 22:27:21,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:22,843 INFO L124 PetriNetUnfolderBase]: 3897/5041 cut-off events. [2023-11-06 22:27:22,844 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 22:27:22,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10171 conditions, 5041 events. 3897/5041 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 23092 event pairs, 2118 based on Foata normal form. 0/1568 useless extension candidates. Maximal degree in co-relation 10086. Up to 5002 conditions per place. [2023-11-06 22:27:22,902 INFO L140 encePairwiseOnDemand]: 501/508 looper letters, 41 selfloop transitions, 17 changer transitions 0/61 dead transitions. [2023-11-06 22:27:22,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 314 flow [2023-11-06 22:27:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:27:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:27:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1336 transitions. [2023-11-06 22:27:22,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43832020997375326 [2023-11-06 22:27:22,911 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1336 transitions. [2023-11-06 22:27:22,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1336 transitions. [2023-11-06 22:27:22,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:22,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1336 transitions. [2023-11-06 22:27:22,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 222.66666666666666) internal successors, (1336), 6 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:22,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:22,931 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:22,931 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 138 flow. Second operand 6 states and 1336 transitions. [2023-11-06 22:27:22,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 314 flow [2023-11-06 22:27:22,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 300 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:27:22,938 INFO L231 Difference]: Finished difference. Result has 55 places, 61 transitions, 254 flow [2023-11-06 22:27:22,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=55, PETRI_TRANSITIONS=61} [2023-11-06 22:27:22,940 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-11-06 22:27:22,941 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 61 transitions, 254 flow [2023-11-06 22:27:22,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 213.14285714285714) internal successors, (1492), 7 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:22,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:22,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:27:22,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:23,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:23,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:23,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash 664823543, now seen corresponding path program 1 times [2023-11-06 22:27:23,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:23,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890526687] [2023-11-06 22:27:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:23,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:23,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:23,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890526687] [2023-11-06 22:27:23,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890526687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:23,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:27:23,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:27:23,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680705182] [2023-11-06 22:27:23,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:23,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:27:23,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:23,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:27:23,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:27:23,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 508 [2023-11-06 22:27:23,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 61 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:23,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:23,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 508 [2023-11-06 22:27:23,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:24,532 INFO L124 PetriNetUnfolderBase]: 3903/5072 cut-off events. [2023-11-06 22:27:24,533 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-06 22:27:24,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10294 conditions, 5072 events. 3903/5072 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 23292 event pairs, 2121 based on Foata normal form. 27/1673 useless extension candidates. Maximal degree in co-relation 10200. Up to 5003 conditions per place. [2023-11-06 22:27:24,570 INFO L140 encePairwiseOnDemand]: 495/508 looper letters, 74 selfloop transitions, 5 changer transitions 1/83 dead transitions. [2023-11-06 22:27:24,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 83 transitions, 523 flow [2023-11-06 22:27:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:27:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:27:24,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1108 transitions. [2023-11-06 22:27:24,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43622047244094486 [2023-11-06 22:27:24,576 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1108 transitions. [2023-11-06 22:27:24,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1108 transitions. [2023-11-06 22:27:24,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:24,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1108 transitions. [2023-11-06 22:27:24,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:24,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 508.0) internal successors, (3048), 6 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:24,590 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 508.0) internal successors, (3048), 6 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:24,590 INFO L175 Difference]: Start difference. First operand has 55 places, 61 transitions, 254 flow. Second operand 5 states and 1108 transitions. [2023-11-06 22:27:24,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 83 transitions, 523 flow [2023-11-06 22:27:24,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 83 transitions, 483 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-06 22:27:24,595 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 275 flow [2023-11-06 22:27:24,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2023-11-06 22:27:24,597 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-11-06 22:27:24,597 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 275 flow [2023-11-06 22:27:24,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:24,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:24,598 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:27:24,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:27:24,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:24,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash 663256291, now seen corresponding path program 2 times [2023-11-06 22:27:24,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:24,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90607085] [2023-11-06 22:27:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:24,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:24,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:24,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90607085] [2023-11-06 22:27:24,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90607085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:24,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30686921] [2023-11-06 22:27:24,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:27:24,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:24,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:24,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:24,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:27:24,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:27:24,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:27:24,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:27:24,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:27:24,802 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:27:24,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30686921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:24,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:27:24,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-06 22:27:24,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990109196] [2023-11-06 22:27:24,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:24,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:24,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:24,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:24,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:27:24,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 508 [2023-11-06 22:27:24,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:24,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:24,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 508 [2023-11-06 22:27:24,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:25,736 INFO L124 PetriNetUnfolderBase]: 3911/5077 cut-off events. [2023-11-06 22:27:25,737 INFO L125 PetriNetUnfolderBase]: For 447/447 co-relation queries the response was YES. [2023-11-06 22:27:25,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12355 conditions, 5077 events. 3911/5077 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 23249 event pairs, 2122 based on Foata normal form. 3/1647 useless extension candidates. Maximal degree in co-relation 12286. Up to 5026 conditions per place. [2023-11-06 22:27:25,785 INFO L140 encePairwiseOnDemand]: 504/508 looper letters, 51 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2023-11-06 22:27:25,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 371 flow [2023-11-06 22:27:25,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:27:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2023-11-06 22:27:25,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452755905511811 [2023-11-06 22:27:25,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2023-11-06 22:27:25,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2023-11-06 22:27:25,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:25,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2023-11-06 22:27:25,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:25,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:25,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:25,797 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 275 flow. Second operand 3 states and 690 transitions. [2023-11-06 22:27:25,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 371 flow [2023-11-06 22:27:25,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 328 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-06 22:27:25,801 INFO L231 Difference]: Finished difference. Result has 55 places, 61 transitions, 226 flow [2023-11-06 22:27:25,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=61} [2023-11-06 22:27:25,802 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-11-06 22:27:25,802 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 61 transitions, 226 flow [2023-11-06 22:27:25,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:25,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:25,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:25,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:26,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:26,010 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:26,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:26,010 INFO L85 PathProgramCache]: Analyzing trace with hash -912322152, now seen corresponding path program 1 times [2023-11-06 22:27:26,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:26,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958386027] [2023-11-06 22:27:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:26,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:26,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:26,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958386027] [2023-11-06 22:27:26,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958386027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:26,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:27:26,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:27:26,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105839367] [2023-11-06 22:27:26,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:26,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:26,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:26,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:26,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:27:26,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 508 [2023-11-06 22:27:26,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 61 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:26,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:26,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 508 [2023-11-06 22:27:26,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:26,939 INFO L124 PetriNetUnfolderBase]: 4482/5947 cut-off events. [2023-11-06 22:27:26,940 INFO L125 PetriNetUnfolderBase]: For 324/324 co-relation queries the response was YES. [2023-11-06 22:27:26,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13969 conditions, 5947 events. 4482/5947 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 29729 event pairs, 2165 based on Foata normal form. 0/2151 useless extension candidates. Maximal degree in co-relation 13704. Up to 4733 conditions per place. [2023-11-06 22:27:26,995 INFO L140 encePairwiseOnDemand]: 502/508 looper letters, 78 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-11-06 22:27:26,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 450 flow [2023-11-06 22:27:26,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:27:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2023-11-06 22:27:27,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744094488188976 [2023-11-06 22:27:27,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2023-11-06 22:27:27,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2023-11-06 22:27:27,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:27,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2023-11-06 22:27:27,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:27,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:27,012 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:27,012 INFO L175 Difference]: Start difference. First operand has 55 places, 61 transitions, 226 flow. Second operand 3 states and 723 transitions. [2023-11-06 22:27:27,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 450 flow [2023-11-06 22:27:27,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 84 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:27:27,022 INFO L231 Difference]: Finished difference. Result has 56 places, 64 transitions, 246 flow [2023-11-06 22:27:27,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=56, PETRI_TRANSITIONS=64} [2023-11-06 22:27:27,025 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2023-11-06 22:27:27,026 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 64 transitions, 246 flow [2023-11-06 22:27:27,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:27,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:27,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:27,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:27:27,030 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:27,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:27,037 INFO L85 PathProgramCache]: Analyzing trace with hash -912322185, now seen corresponding path program 1 times [2023-11-06 22:27:27,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:27,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971634048] [2023-11-06 22:27:27,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:27,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:27,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:27,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971634048] [2023-11-06 22:27:27,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971634048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:27,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380491083] [2023-11-06 22:27:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:27,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:27,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:27,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:27,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:27:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:27,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:27:27,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:27,345 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:27:27,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380491083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:27,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:27:27,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-06 22:27:27,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812310233] [2023-11-06 22:27:27,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:27,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:27,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:27,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:27,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:27:27,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 508 [2023-11-06 22:27:27,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 64 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:27,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:27,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 508 [2023-11-06 22:27:27,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:27,987 INFO L124 PetriNetUnfolderBase]: 2286/3087 cut-off events. [2023-11-06 22:27:27,988 INFO L125 PetriNetUnfolderBase]: For 1362/1486 co-relation queries the response was YES. [2023-11-06 22:27:27,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8171 conditions, 3087 events. 2286/3087 cut-off events. For 1362/1486 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 14305 event pairs, 1408 based on Foata normal form. 374/1611 useless extension candidates. Maximal degree in co-relation 8006. Up to 3074 conditions per place. [2023-11-06 22:27:28,017 INFO L140 encePairwiseOnDemand]: 504/508 looper letters, 56 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-11-06 22:27:28,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 339 flow [2023-11-06 22:27:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:27:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-11-06 22:27:28,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45931758530183725 [2023-11-06 22:27:28,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-11-06 22:27:28,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-11-06 22:27:28,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:28,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-11-06 22:27:28,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:28,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:28,064 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:28,064 INFO L175 Difference]: Start difference. First operand has 56 places, 64 transitions, 246 flow. Second operand 3 states and 700 transitions. [2023-11-06 22:27:28,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 339 flow [2023-11-06 22:27:28,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 334 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:27:28,068 INFO L231 Difference]: Finished difference. Result has 54 places, 60 transitions, 222 flow [2023-11-06 22:27:28,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=54, PETRI_TRANSITIONS=60} [2023-11-06 22:27:28,069 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-11-06 22:27:28,069 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 60 transitions, 222 flow [2023-11-06 22:27:28,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:28,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:28,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:28,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:28,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:27:28,278 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:28,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:28,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1782785439, now seen corresponding path program 1 times [2023-11-06 22:27:28,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:28,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910546113] [2023-11-06 22:27:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:28,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:28,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:28,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910546113] [2023-11-06 22:27:28,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910546113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:28,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864371867] [2023-11-06 22:27:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:28,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:28,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:28,400 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:28,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:27:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:28,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:27:28,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:28,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:28,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864371867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:28,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:27:28,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2023-11-06 22:27:28,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150391723] [2023-11-06 22:27:28,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:28,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:27:28,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:28,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:27:28,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:27:28,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 508 [2023-11-06 22:27:28,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 60 transitions, 222 flow. Second operand has 11 states, 11 states have (on average 200.9090909090909) internal successors, (2210), 11 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:28,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:28,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 508 [2023-11-06 22:27:28,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:30,237 INFO L124 PetriNetUnfolderBase]: 4790/6505 cut-off events. [2023-11-06 22:27:30,238 INFO L125 PetriNetUnfolderBase]: For 1914/1914 co-relation queries the response was YES. [2023-11-06 22:27:30,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15987 conditions, 6505 events. 4790/6505 cut-off events. For 1914/1914 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 33956 event pairs, 868 based on Foata normal form. 352/3278 useless extension candidates. Maximal degree in co-relation 15975. Up to 2645 conditions per place. [2023-11-06 22:27:30,281 INFO L140 encePairwiseOnDemand]: 497/508 looper letters, 201 selfloop transitions, 22 changer transitions 2/227 dead transitions. [2023-11-06 22:27:30,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 227 transitions, 1115 flow [2023-11-06 22:27:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:27:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:27:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3193 transitions. [2023-11-06 22:27:30,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41902887139107614 [2023-11-06 22:27:30,294 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3193 transitions. [2023-11-06 22:27:30,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3193 transitions. [2023-11-06 22:27:30,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:30,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3193 transitions. [2023-11-06 22:27:30,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 212.86666666666667) internal successors, (3193), 15 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:30,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 508.0) internal successors, (8128), 16 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:30,324 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 508.0) internal successors, (8128), 16 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:30,324 INFO L175 Difference]: Start difference. First operand has 54 places, 60 transitions, 222 flow. Second operand 15 states and 3193 transitions. [2023-11-06 22:27:30,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 227 transitions, 1115 flow [2023-11-06 22:27:30,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 227 transitions, 1114 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:27:30,331 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 368 flow [2023-11-06 22:27:30,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=368, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-11-06 22:27:30,332 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2023-11-06 22:27:30,332 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 368 flow [2023-11-06 22:27:30,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.9090909090909) internal successors, (2210), 11 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:30,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:30,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:30,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:30,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:30,539 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:30,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1622869413, now seen corresponding path program 1 times [2023-11-06 22:27:30,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:30,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901862380] [2023-11-06 22:27:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:30,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:30,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:30,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901862380] [2023-11-06 22:27:30,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901862380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:30,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493774313] [2023-11-06 22:27:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:30,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:30,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:30,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:30,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:27:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:30,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:27:30,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:27:30,890 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:27:30,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493774313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:30,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:27:30,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-06 22:27:30,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462889911] [2023-11-06 22:27:30,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:30,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:27:30,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:30,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:27:30,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:27:30,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 508 [2023-11-06 22:27:30,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 368 flow. Second operand has 5 states, 5 states have (on average 220.8) internal successors, (1104), 5 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:30,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:30,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 508 [2023-11-06 22:27:30,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:31,793 INFO L124 PetriNetUnfolderBase]: 4313/5900 cut-off events. [2023-11-06 22:27:31,794 INFO L125 PetriNetUnfolderBase]: For 4475/4479 co-relation queries the response was YES. [2023-11-06 22:27:31,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16930 conditions, 5900 events. 4313/5900 cut-off events. For 4475/4479 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 31288 event pairs, 1105 based on Foata normal form. 260/3042 useless extension candidates. Maximal degree in co-relation 16911. Up to 2786 conditions per place. [2023-11-06 22:27:31,841 INFO L140 encePairwiseOnDemand]: 504/508 looper letters, 111 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2023-11-06 22:27:31,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 124 transitions, 724 flow [2023-11-06 22:27:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:27:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:27:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1192 transitions. [2023-11-06 22:27:31,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692913385826772 [2023-11-06 22:27:31,847 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1192 transitions. [2023-11-06 22:27:31,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1192 transitions. [2023-11-06 22:27:31,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:31,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1192 transitions. [2023-11-06 22:27:31,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.4) internal successors, (1192), 5 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:31,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 508.0) internal successors, (3048), 6 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:31,859 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 508.0) internal successors, (3048), 6 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:31,859 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 368 flow. Second operand 5 states and 1192 transitions. [2023-11-06 22:27:31,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 124 transitions, 724 flow [2023-11-06 22:27:31,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 124 transitions, 686 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-06 22:27:31,884 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 332 flow [2023-11-06 22:27:31,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2023-11-06 22:27:31,885 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2023-11-06 22:27:31,886 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 332 flow [2023-11-06 22:27:31,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 220.8) internal successors, (1104), 5 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:31,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:31,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:31,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:32,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:32,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:32,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:32,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1289429829, now seen corresponding path program 1 times [2023-11-06 22:27:32,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:32,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247021238] [2023-11-06 22:27:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:32,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:32,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:32,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247021238] [2023-11-06 22:27:32,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247021238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:32,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:27:32,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:27:32,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066590400] [2023-11-06 22:27:32,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:32,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:32,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:32,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:32,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:27:32,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 508 [2023-11-06 22:27:32,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:32,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:32,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 508 [2023-11-06 22:27:32,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:32,954 INFO L124 PetriNetUnfolderBase]: 3815/5314 cut-off events. [2023-11-06 22:27:32,954 INFO L125 PetriNetUnfolderBase]: For 8049/8189 co-relation queries the response was YES. [2023-11-06 22:27:32,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15040 conditions, 5314 events. 3815/5314 cut-off events. For 8049/8189 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 25526 event pairs, 678 based on Foata normal form. 250/2838 useless extension candidates. Maximal degree in co-relation 15022. Up to 4747 conditions per place. [2023-11-06 22:27:32,997 INFO L140 encePairwiseOnDemand]: 498/508 looper letters, 74 selfloop transitions, 5 changer transitions 6/90 dead transitions. [2023-11-06 22:27:32,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 599 flow [2023-11-06 22:27:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:27:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 711 transitions. [2023-11-06 22:27:33,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46653543307086615 [2023-11-06 22:27:33,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 711 transitions. [2023-11-06 22:27:33,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 711 transitions. [2023-11-06 22:27:33,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:33,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 711 transitions. [2023-11-06 22:27:33,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:33,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:33,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:33,017 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 332 flow. Second operand 3 states and 711 transitions. [2023-11-06 22:27:33,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 599 flow [2023-11-06 22:27:33,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 90 transitions, 571 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:27:33,025 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 312 flow [2023-11-06 22:27:33,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2023-11-06 22:27:33,030 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2023-11-06 22:27:33,031 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 312 flow [2023-11-06 22:27:33,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:33,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:33,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:33,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:27:33,032 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:33,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:33,033 INFO L85 PathProgramCache]: Analyzing trace with hash -206023935, now seen corresponding path program 1 times [2023-11-06 22:27:33,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:33,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060833361] [2023-11-06 22:27:33,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:33,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:33,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:33,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060833361] [2023-11-06 22:27:33,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060833361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:33,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:27:33,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:27:33,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60497319] [2023-11-06 22:27:33,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:33,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:33,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:33,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:33,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:27:33,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 508 [2023-11-06 22:27:33,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:33,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:33,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 508 [2023-11-06 22:27:33,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:33,892 INFO L124 PetriNetUnfolderBase]: 2797/3882 cut-off events. [2023-11-06 22:27:33,892 INFO L125 PetriNetUnfolderBase]: For 4698/4711 co-relation queries the response was YES. [2023-11-06 22:27:33,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12766 conditions, 3882 events. 2797/3882 cut-off events. For 4698/4711 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 17358 event pairs, 804 based on Foata normal form. 25/2027 useless extension candidates. Maximal degree in co-relation 12746. Up to 3835 conditions per place. [2023-11-06 22:27:33,932 INFO L140 encePairwiseOnDemand]: 504/508 looper letters, 61 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-11-06 22:27:33,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 70 transitions, 441 flow [2023-11-06 22:27:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:27:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 698 transitions. [2023-11-06 22:27:33,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458005249343832 [2023-11-06 22:27:33,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 698 transitions. [2023-11-06 22:27:33,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 698 transitions. [2023-11-06 22:27:33,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:33,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 698 transitions. [2023-11-06 22:27:33,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:33,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:33,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:33,949 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 312 flow. Second operand 3 states and 698 transitions. [2023-11-06 22:27:33,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 70 transitions, 441 flow [2023-11-06 22:27:33,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 424 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-06 22:27:33,958 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 297 flow [2023-11-06 22:27:33,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2023-11-06 22:27:33,960 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 9 predicate places. [2023-11-06 22:27:33,960 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 297 flow [2023-11-06 22:27:33,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:33,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:33,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:33,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:27:33,961 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:33,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:33,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1622869460, now seen corresponding path program 2 times [2023-11-06 22:27:33,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:33,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43041255] [2023-11-06 22:27:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:33,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:27:34,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:34,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43041255] [2023-11-06 22:27:34,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43041255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:34,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385960658] [2023-11-06 22:27:34,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:27:34,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:34,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:34,074 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:34,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:27:34,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:27:34,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:27:34,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:27:34,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:27:34,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:27:34,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385960658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:34,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:27:34,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-06 22:27:34,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44509362] [2023-11-06 22:27:34,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:34,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:34,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:34,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:34,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:27:34,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 508 [2023-11-06 22:27:34,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 297 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:34,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:34,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 508 [2023-11-06 22:27:34,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:34,793 INFO L124 PetriNetUnfolderBase]: 2412/3375 cut-off events. [2023-11-06 22:27:34,793 INFO L125 PetriNetUnfolderBase]: For 5128/5137 co-relation queries the response was YES. [2023-11-06 22:27:34,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10938 conditions, 3375 events. 2412/3375 cut-off events. For 5128/5137 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 14823 event pairs, 1041 based on Foata normal form. 9/1856 useless extension candidates. Maximal degree in co-relation 10918. Up to 3357 conditions per place. [2023-11-06 22:27:34,826 INFO L140 encePairwiseOnDemand]: 506/508 looper letters, 59 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-11-06 22:27:34,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 407 flow [2023-11-06 22:27:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:27:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 696 transitions. [2023-11-06 22:27:34,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4566929133858268 [2023-11-06 22:27:34,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 696 transitions. [2023-11-06 22:27:34,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 696 transitions. [2023-11-06 22:27:34,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:34,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 696 transitions. [2023-11-06 22:27:34,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:34,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:34,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:34,841 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 297 flow. Second operand 3 states and 696 transitions. [2023-11-06 22:27:34,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 407 flow [2023-11-06 22:27:34,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 388 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-06 22:27:34,849 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 270 flow [2023-11-06 22:27:34,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2023-11-06 22:27:34,851 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-11-06 22:27:34,851 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 270 flow [2023-11-06 22:27:34,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:34,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:34,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:34,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:35,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:35,059 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:35,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:35,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1547897966, now seen corresponding path program 1 times [2023-11-06 22:27:35,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:35,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832902895] [2023-11-06 22:27:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:35,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:35,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:35,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832902895] [2023-11-06 22:27:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832902895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:35,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:27:35,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:27:35,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503347777] [2023-11-06 22:27:35,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:35,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:27:35,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:27:35,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:27:35,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 508 [2023-11-06 22:27:35,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 210.5) internal successors, (842), 4 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:35,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:35,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 508 [2023-11-06 22:27:35,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:35,955 INFO L124 PetriNetUnfolderBase]: 2488/3545 cut-off events. [2023-11-06 22:27:35,955 INFO L125 PetriNetUnfolderBase]: For 4702/4721 co-relation queries the response was YES. [2023-11-06 22:27:35,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11252 conditions, 3545 events. 2488/3545 cut-off events. For 4702/4721 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 16195 event pairs, 1089 based on Foata normal form. 67/2084 useless extension candidates. Maximal degree in co-relation 11234. Up to 3346 conditions per place. [2023-11-06 22:27:35,978 INFO L140 encePairwiseOnDemand]: 496/508 looper letters, 52 selfloop transitions, 7 changer transitions 18/81 dead transitions. [2023-11-06 22:27:35,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 81 transitions, 506 flow [2023-11-06 22:27:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:27:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:27:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1096 transitions. [2023-11-06 22:27:35,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431496062992126 [2023-11-06 22:27:35,984 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1096 transitions. [2023-11-06 22:27:35,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1096 transitions. [2023-11-06 22:27:35,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:35,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1096 transitions. [2023-11-06 22:27:35,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.2) internal successors, (1096), 5 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:35,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 508.0) internal successors, (3048), 6 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:35,995 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 508.0) internal successors, (3048), 6 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:35,995 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 270 flow. Second operand 5 states and 1096 transitions. [2023-11-06 22:27:35,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 81 transitions, 506 flow [2023-11-06 22:27:35,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:27:35,999 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 298 flow [2023-11-06 22:27:36,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2023-11-06 22:27:36,000 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-11-06 22:27:36,001 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 298 flow [2023-11-06 22:27:36,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.5) internal successors, (842), 4 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:36,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:36,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:36,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:27:36,002 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:36,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:36,002 INFO L85 PathProgramCache]: Analyzing trace with hash -417768705, now seen corresponding path program 1 times [2023-11-06 22:27:36,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:36,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455477728] [2023-11-06 22:27:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:36,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:36,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:36,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455477728] [2023-11-06 22:27:36,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455477728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:36,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585392596] [2023-11-06 22:27:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:36,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:36,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:36,682 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:36,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:27:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:36,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:27:36,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:37,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:37,116 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:27:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:37,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:37,345 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:27:37,345 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-06 22:27:37,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-06 22:27:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:37,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585392596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:37,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:27:37,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-06 22:27:37,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267286577] [2023-11-06 22:27:37,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:37,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:27:37,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:37,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:27:37,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:27:38,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 508 [2023-11-06 22:27:38,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 298 flow. Second operand has 20 states, 20 states have (on average 185.8) internal successors, (3716), 20 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:38,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:38,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 508 [2023-11-06 22:27:38,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:41,093 INFO L124 PetriNetUnfolderBase]: 2952/4238 cut-off events. [2023-11-06 22:27:41,094 INFO L125 PetriNetUnfolderBase]: For 4904/4931 co-relation queries the response was YES. [2023-11-06 22:27:41,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13822 conditions, 4238 events. 2952/4238 cut-off events. For 4904/4931 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 21168 event pairs, 188 based on Foata normal form. 27/2444 useless extension candidates. Maximal degree in co-relation 13802. Up to 1991 conditions per place. [2023-11-06 22:27:41,133 INFO L140 encePairwiseOnDemand]: 493/508 looper letters, 218 selfloop transitions, 50 changer transitions 0/271 dead transitions. [2023-11-06 22:27:41,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 271 transitions, 1644 flow [2023-11-06 22:27:41,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:27:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:27:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3731 transitions. [2023-11-06 22:27:41,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38655200994612515 [2023-11-06 22:27:41,150 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3731 transitions. [2023-11-06 22:27:41,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3731 transitions. [2023-11-06 22:27:41,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:41,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3731 transitions. [2023-11-06 22:27:41,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 196.3684210526316) internal successors, (3731), 19 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:41,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 508.0) internal successors, (10160), 20 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:41,184 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 508.0) internal successors, (10160), 20 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:41,184 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 298 flow. Second operand 19 states and 3731 transitions. [2023-11-06 22:27:41,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 271 transitions, 1644 flow [2023-11-06 22:27:41,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 271 transitions, 1550 flow, removed 37 selfloop flow, removed 4 redundant places. [2023-11-06 22:27:41,197 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 627 flow [2023-11-06 22:27:41,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=627, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2023-11-06 22:27:41,198 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2023-11-06 22:27:41,199 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 627 flow [2023-11-06 22:27:41,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 185.8) internal successors, (3716), 20 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:41,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:41,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:41,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:41,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:27:41,406 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:27:41,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash -625661686, now seen corresponding path program 1 times [2023-11-06 22:27:41,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:41,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604136647] [2023-11-06 22:27:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:41,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:41,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:41,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604136647] [2023-11-06 22:27:41,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604136647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:41,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029630487] [2023-11-06 22:27:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:41,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:41,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:41,951 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:41,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:27:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:42,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:27:42,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:42,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,144 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:27:42,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:27:42,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,180 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:27:42,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,195 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:27:42,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:27:42,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,230 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:27:42,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,251 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:27:42,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:42,264 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:27:42,314 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:27:42,396 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:27:42,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:27:42,452 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:27:42,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:27:42,573 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:27:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:42,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:45,299 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:27:45,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2023-11-06 22:27:45,318 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:27:45,319 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1308 treesize of output 1252 [2023-11-06 22:27:45,368 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:27:45,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 202 [2023-11-06 22:27:45,412 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:27:45,413 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 190 [2023-11-06 22:27:45,451 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:27:45,452 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 165 [2023-11-06 22:27:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:46,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029630487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:46,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:27:46,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 21 [2023-11-06 22:27:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765779279] [2023-11-06 22:27:46,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:46,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:27:46,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:46,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:27:46,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=400, Unknown=11, NotChecked=0, Total=506 [2023-11-06 22:27:48,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:27:50,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:27:52,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:27:55,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:27:57,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:27:59,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:28:01,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:28:03,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:28:05,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:28:05,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 508 [2023-11-06 22:28:05,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 627 flow. Second operand has 23 states, 23 states have (on average 153.56521739130434) internal successors, (3532), 23 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:05,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:05,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 508 [2023-11-06 22:28:05,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:11,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:28:15,340 INFO L124 PetriNetUnfolderBase]: 3092/4564 cut-off events. [2023-11-06 22:28:15,340 INFO L125 PetriNetUnfolderBase]: For 9514/9544 co-relation queries the response was YES. [2023-11-06 22:28:15,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17122 conditions, 4564 events. 3092/4564 cut-off events. For 9514/9544 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 23837 event pairs, 825 based on Foata normal form. 48/3130 useless extension candidates. Maximal degree in co-relation 17093. Up to 2111 conditions per place. [2023-11-06 22:28:15,385 INFO L140 encePairwiseOnDemand]: 493/508 looper letters, 249 selfloop transitions, 71 changer transitions 0/323 dead transitions. [2023-11-06 22:28:15,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 323 transitions, 2246 flow [2023-11-06 22:28:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:28:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:28:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4690 transitions. [2023-11-06 22:28:15,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31835460222644585 [2023-11-06 22:28:15,410 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4690 transitions. [2023-11-06 22:28:15,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4690 transitions. [2023-11-06 22:28:15,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:15,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4690 transitions. [2023-11-06 22:28:15,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 161.72413793103448) internal successors, (4690), 29 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:15,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 508.0) internal successors, (15240), 30 states have internal predecessors, (15240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:15,465 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 508.0) internal successors, (15240), 30 states have internal predecessors, (15240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:15,466 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 627 flow. Second operand 29 states and 4690 transitions. [2023-11-06 22:28:15,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 323 transitions, 2246 flow [2023-11-06 22:28:15,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 323 transitions, 2200 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-11-06 22:28:15,490 INFO L231 Difference]: Finished difference. Result has 135 places, 146 transitions, 1254 flow [2023-11-06 22:28:15,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1254, PETRI_PLACES=135, PETRI_TRANSITIONS=146} [2023-11-06 22:28:15,491 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 78 predicate places. [2023-11-06 22:28:15,491 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 146 transitions, 1254 flow [2023-11-06 22:28:15,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 153.56521739130434) internal successors, (3532), 23 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:15,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:15,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:15,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:28:15,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:28:15,699 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:28:15,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:15,700 INFO L85 PathProgramCache]: Analyzing trace with hash -45589743, now seen corresponding path program 1 times [2023-11-06 22:28:15,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:28:15,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927295911] [2023-11-06 22:28:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:15,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:28:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:28:16,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:28:16,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927295911] [2023-11-06 22:28:16,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927295911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:28:16,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013795090] [2023-11-06 22:28:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:16,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:16,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:28:16,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:28:16,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:28:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:16,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:28:16,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:16,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,519 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:28:16,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:28:16,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:28:16,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,563 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:28:16,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:28:16,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:28:16,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,618 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:28:16,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:16,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:28:16,711 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:28:16,782 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:28:16,783 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:28:16,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:28:16,879 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:28:16,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:17,000 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:28:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:28:17,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:28:17,749 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:28:17,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2023-11-06 22:28:17,768 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:28:17,768 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 484 treesize of output 460 [2023-11-06 22:28:17,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 128 [2023-11-06 22:28:17,814 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:28:17,814 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 122 [2023-11-06 22:28:17,833 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:28:17,833 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 109 [2023-11-06 22:28:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:28:18,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013795090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:28:18,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:28:18,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-11-06 22:28:18,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368189312] [2023-11-06 22:28:18,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:28:18,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:28:18,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:28:18,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:28:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=462, Unknown=5, NotChecked=0, Total=552 [2023-11-06 22:28:20,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 508 [2023-11-06 22:28:20,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 146 transitions, 1254 flow. Second operand has 24 states, 24 states have (on average 155.5) internal successors, (3732), 24 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:20,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:20,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 508 [2023-11-06 22:28:20,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:23,160 INFO L124 PetriNetUnfolderBase]: 3289/4845 cut-off events. [2023-11-06 22:28:23,160 INFO L125 PetriNetUnfolderBase]: For 14344/14377 co-relation queries the response was YES. [2023-11-06 22:28:23,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19288 conditions, 4845 events. 3289/4845 cut-off events. For 14344/14377 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 25863 event pairs, 509 based on Foata normal form. 102/3480 useless extension candidates. Maximal degree in co-relation 19240. Up to 2306 conditions per place. [2023-11-06 22:28:23,203 INFO L140 encePairwiseOnDemand]: 493/508 looper letters, 220 selfloop transitions, 61 changer transitions 0/284 dead transitions. [2023-11-06 22:28:23,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 284 transitions, 2490 flow [2023-11-06 22:28:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:28:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:28:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2820 transitions. [2023-11-06 22:28:23,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32654006484483555 [2023-11-06 22:28:23,209 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2820 transitions. [2023-11-06 22:28:23,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2820 transitions. [2023-11-06 22:28:23,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:23,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2820 transitions. [2023-11-06 22:28:23,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 165.88235294117646) internal successors, (2820), 17 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:23,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 508.0) internal successors, (9144), 18 states have internal predecessors, (9144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:23,228 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 508.0) internal successors, (9144), 18 states have internal predecessors, (9144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:23,228 INFO L175 Difference]: Start difference. First operand has 135 places, 146 transitions, 1254 flow. Second operand 17 states and 2820 transitions. [2023-11-06 22:28:23,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 284 transitions, 2490 flow [2023-11-06 22:28:23,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 284 transitions, 2417 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-11-06 22:28:23,287 INFO L231 Difference]: Finished difference. Result has 152 places, 152 transitions, 1478 flow [2023-11-06 22:28:23,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1478, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2023-11-06 22:28:23,288 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 95 predicate places. [2023-11-06 22:28:23,288 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 1478 flow [2023-11-06 22:28:23,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 155.5) internal successors, (3732), 24 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:23,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:23,290 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:23,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:28:23,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:28:23,495 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:28:23,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:23,495 INFO L85 PathProgramCache]: Analyzing trace with hash -825114463, now seen corresponding path program 1 times [2023-11-06 22:28:23,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:28:23,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615247870] [2023-11-06 22:28:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:23,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:28:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:28:23,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:28:23,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615247870] [2023-11-06 22:28:23,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615247870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:28:23,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:28:23,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:28:23,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001590174] [2023-11-06 22:28:23,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:28:23,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:28:23,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:28:23,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:28:23,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:28:23,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 508 [2023-11-06 22:28:23,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 1478 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:23,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:23,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 508 [2023-11-06 22:28:23,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:24,471 INFO L124 PetriNetUnfolderBase]: 3273/4811 cut-off events. [2023-11-06 22:28:24,472 INFO L125 PetriNetUnfolderBase]: For 20141/20164 co-relation queries the response was YES. [2023-11-06 22:28:24,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20896 conditions, 4811 events. 3273/4811 cut-off events. For 20141/20164 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 25760 event pairs, 838 based on Foata normal form. 49/3320 useless extension candidates. Maximal degree in co-relation 20842. Up to 3748 conditions per place. [2023-11-06 22:28:24,513 INFO L140 encePairwiseOnDemand]: 504/508 looper letters, 148 selfloop transitions, 17 changer transitions 0/169 dead transitions. [2023-11-06 22:28:24,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 169 transitions, 1908 flow [2023-11-06 22:28:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:28:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:28:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 715 transitions. [2023-11-06 22:28:24,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46916010498687666 [2023-11-06 22:28:24,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 715 transitions. [2023-11-06 22:28:24,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 715 transitions. [2023-11-06 22:28:24,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:24,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 715 transitions. [2023-11-06 22:28:24,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:24,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:24,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:24,521 INFO L175 Difference]: Start difference. First operand has 152 places, 152 transitions, 1478 flow. Second operand 3 states and 715 transitions. [2023-11-06 22:28:24,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 169 transitions, 1908 flow [2023-11-06 22:28:24,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 169 transitions, 1801 flow, removed 40 selfloop flow, removed 6 redundant places. [2023-11-06 22:28:24,589 INFO L231 Difference]: Finished difference. Result has 148 places, 149 transitions, 1362 flow [2023-11-06 22:28:24,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1362, PETRI_PLACES=148, PETRI_TRANSITIONS=149} [2023-11-06 22:28:24,590 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 91 predicate places. [2023-11-06 22:28:24,590 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 149 transitions, 1362 flow [2023-11-06 22:28:24,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:24,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:24,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:24,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 22:28:24,591 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:28:24,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:24,592 INFO L85 PathProgramCache]: Analyzing trace with hash -649184899, now seen corresponding path program 1 times [2023-11-06 22:28:24,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:28:24,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739758261] [2023-11-06 22:28:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:24,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:28:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:28:24,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:28:24,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739758261] [2023-11-06 22:28:24,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739758261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:28:24,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229881804] [2023-11-06 22:28:24,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:24,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:24,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:28:24,708 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:28:24,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:28:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:24,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:28:24,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:28:24,890 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:28:24,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229881804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:28:24,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:28:24,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-06 22:28:24,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288119622] [2023-11-06 22:28:24,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:28:24,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:28:24,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:28:24,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:28:24,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:28:24,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 508 [2023-11-06 22:28:24,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 149 transitions, 1362 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:24,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:24,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 508 [2023-11-06 22:28:24,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:25,558 INFO L124 PetriNetUnfolderBase]: 2465/3675 cut-off events. [2023-11-06 22:28:25,558 INFO L125 PetriNetUnfolderBase]: For 14797/14820 co-relation queries the response was YES. [2023-11-06 22:28:25,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16012 conditions, 3675 events. 2465/3675 cut-off events. For 14797/14820 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 18779 event pairs, 1120 based on Foata normal form. 185/2789 useless extension candidates. Maximal degree in co-relation 15957. Up to 3635 conditions per place. [2023-11-06 22:28:25,595 INFO L140 encePairwiseOnDemand]: 505/508 looper letters, 138 selfloop transitions, 1 changer transitions 0/143 dead transitions. [2023-11-06 22:28:25,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 143 transitions, 1592 flow [2023-11-06 22:28:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:28:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:28:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2023-11-06 22:28:25,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45603674540682415 [2023-11-06 22:28:25,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2023-11-06 22:28:25,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2023-11-06 22:28:25,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:25,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2023-11-06 22:28:25,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:25,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:25,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:25,602 INFO L175 Difference]: Start difference. First operand has 148 places, 149 transitions, 1362 flow. Second operand 3 states and 695 transitions. [2023-11-06 22:28:25,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 143 transitions, 1592 flow [2023-11-06 22:28:25,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 143 transitions, 1542 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-06 22:28:25,646 INFO L231 Difference]: Finished difference. Result has 146 places, 143 transitions, 1266 flow [2023-11-06 22:28:25,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1266, PETRI_PLACES=146, PETRI_TRANSITIONS=143} [2023-11-06 22:28:25,647 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 89 predicate places. [2023-11-06 22:28:25,647 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 143 transitions, 1266 flow [2023-11-06 22:28:25,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:25,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:25,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:25,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 22:28:25,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:28:25,854 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:28:25,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:25,855 INFO L85 PathProgramCache]: Analyzing trace with hash -45589593, now seen corresponding path program 1 times [2023-11-06 22:28:25,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:28:25,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416892874] [2023-11-06 22:28:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:25,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:28:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:28:26,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:28:26,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416892874] [2023-11-06 22:28:26,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416892874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:28:26,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302987965] [2023-11-06 22:28:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:26,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:26,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:28:26,484 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:28:26,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:28:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:26,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:28:26,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:26,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:26,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:26,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:26,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:26,703 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:28:26,705 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2023-11-06 22:28:26,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:26,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:26,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:26,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:26,771 INFO L322 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2023-11-06 22:28:26,771 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-06 22:28:26,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:26,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:26,822 INFO L322 Elim1Store]: treesize reduction 37, result has 2.6 percent of original size [2023-11-06 22:28:26,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-06 22:28:26,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:28:27,011 INFO L322 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2023-11-06 22:28:27,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 28 [2023-11-06 22:28:27,097 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:28:27,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:28:27,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:28:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:28:27,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:28:27,427 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_516 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_516) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-11-06 22:28:27,854 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:28:27,854 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2023-11-06 22:28:27,868 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:28:27,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 224 [2023-11-06 22:28:27,894 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:28:27,895 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 200 [2023-11-06 22:28:27,910 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 116 [2023-11-06 22:28:27,932 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:28:27,933 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 109 [2023-11-06 22:28:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:28:28,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302987965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:28:28,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:28:28,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-11-06 22:28:28,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300582850] [2023-11-06 22:28:28,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:28:28,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:28:28,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:28:28,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:28:28,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=4, NotChecked=42, Total=552 [2023-11-06 22:28:29,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 508 [2023-11-06 22:28:29,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 143 transitions, 1266 flow. Second operand has 24 states, 24 states have (on average 153.5) internal successors, (3684), 24 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:29,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:29,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 508 [2023-11-06 22:28:29,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:30,411 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_516 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_516) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)))) (and (or (< c_~n1~0 (+ c_~q1_back~0 1)) .cse0 (not (= (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_back~0 4) c_~q1~0.offset)) 2)) (< c_~q1_back~0 0)) .cse0)) is different from false [2023-11-06 22:28:33,192 INFO L124 PetriNetUnfolderBase]: 2846/4253 cut-off events. [2023-11-06 22:28:33,192 INFO L125 PetriNetUnfolderBase]: For 15460/15496 co-relation queries the response was YES. [2023-11-06 22:28:33,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18507 conditions, 4253 events. 2846/4253 cut-off events. For 15460/15496 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 22553 event pairs, 789 based on Foata normal form. 50/3116 useless extension candidates. Maximal degree in co-relation 18452. Up to 2161 conditions per place. [2023-11-06 22:28:33,246 INFO L140 encePairwiseOnDemand]: 494/508 looper letters, 204 selfloop transitions, 75 changer transitions 0/282 dead transitions. [2023-11-06 22:28:33,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 282 transitions, 2561 flow [2023-11-06 22:28:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:28:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:28:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4303 transitions. [2023-11-06 22:28:33,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3137212015164771 [2023-11-06 22:28:33,254 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4303 transitions. [2023-11-06 22:28:33,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4303 transitions. [2023-11-06 22:28:33,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:33,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4303 transitions. [2023-11-06 22:28:33,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 159.37037037037038) internal successors, (4303), 27 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:33,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 508.0) internal successors, (14224), 28 states have internal predecessors, (14224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:33,282 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 508.0) internal successors, (14224), 28 states have internal predecessors, (14224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:33,283 INFO L175 Difference]: Start difference. First operand has 146 places, 143 transitions, 1266 flow. Second operand 27 states and 4303 transitions. [2023-11-06 22:28:33,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 282 transitions, 2561 flow [2023-11-06 22:28:33,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 282 transitions, 2560 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:28:33,333 INFO L231 Difference]: Finished difference. Result has 180 places, 161 transitions, 1706 flow [2023-11-06 22:28:33,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1706, PETRI_PLACES=180, PETRI_TRANSITIONS=161} [2023-11-06 22:28:33,334 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 123 predicate places. [2023-11-06 22:28:33,334 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 161 transitions, 1706 flow [2023-11-06 22:28:33,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 153.5) internal successors, (3684), 24 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:33,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:33,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:33,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:28:33,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:33,543 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:28:33,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:33,543 INFO L85 PathProgramCache]: Analyzing trace with hash -417768556, now seen corresponding path program 2 times [2023-11-06 22:28:33,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:28:33,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969824717] [2023-11-06 22:28:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:33,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:28:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:28:34,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:28:34,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969824717] [2023-11-06 22:28:34,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969824717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:28:34,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001212502] [2023-11-06 22:28:34,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:28:34,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:34,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:28:34,502 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:28:34,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:28:34,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:28:34,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:28:34,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:28:34,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:34,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:34,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:28:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:28:34,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:28:34,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001212502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:28:34,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:28:34,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-11-06 22:28:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326700473] [2023-11-06 22:28:34,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:28:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:28:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:28:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:28:34,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:28:35,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 508 [2023-11-06 22:28:35,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 161 transitions, 1706 flow. Second operand has 7 states, 7 states have (on average 197.71428571428572) internal successors, (1384), 7 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:35,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:35,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 508 [2023-11-06 22:28:35,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:36,331 INFO L124 PetriNetUnfolderBase]: 2911/4374 cut-off events. [2023-11-06 22:28:36,332 INFO L125 PetriNetUnfolderBase]: For 22900/22933 co-relation queries the response was YES. [2023-11-06 22:28:36,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20526 conditions, 4374 events. 2911/4374 cut-off events. For 22900/22933 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 23129 event pairs, 1144 based on Foata normal form. 65/3312 useless extension candidates. Maximal degree in co-relation 20461. Up to 3737 conditions per place. [2023-11-06 22:28:36,440 INFO L140 encePairwiseOnDemand]: 499/508 looper letters, 169 selfloop transitions, 27 changer transitions 0/199 dead transitions. [2023-11-06 22:28:36,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 199 transitions, 2312 flow [2023-11-06 22:28:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:28:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:28:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1248 transitions. [2023-11-06 22:28:36,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4094488188976378 [2023-11-06 22:28:36,445 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1248 transitions. [2023-11-06 22:28:36,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1248 transitions. [2023-11-06 22:28:36,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:36,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1248 transitions. [2023-11-06 22:28:36,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:36,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:36,453 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:36,453 INFO L175 Difference]: Start difference. First operand has 180 places, 161 transitions, 1706 flow. Second operand 6 states and 1248 transitions. [2023-11-06 22:28:36,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 199 transitions, 2312 flow [2023-11-06 22:28:36,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 199 transitions, 2174 flow, removed 30 selfloop flow, removed 17 redundant places. [2023-11-06 22:28:36,537 INFO L231 Difference]: Finished difference. Result has 170 places, 165 transitions, 1700 flow [2023-11-06 22:28:36,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1700, PETRI_PLACES=170, PETRI_TRANSITIONS=165} [2023-11-06 22:28:36,537 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 113 predicate places. [2023-11-06 22:28:36,538 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 165 transitions, 1700 flow [2023-11-06 22:28:36,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 197.71428571428572) internal successors, (1384), 7 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:36,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:36,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:36,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:28:36,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:36,745 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:28:36,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:36,745 INFO L85 PathProgramCache]: Analyzing trace with hash -633480778, now seen corresponding path program 1 times [2023-11-06 22:28:36,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:28:36,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113759641] [2023-11-06 22:28:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:36,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:28:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:28:37,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:28:37,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113759641] [2023-11-06 22:28:37,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113759641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:28:37,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389209389] [2023-11-06 22:28:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:37,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:37,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:28:37,635 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:28:37,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:28:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:37,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:28:37,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:28:37,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:28:37,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389209389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:28:37,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:28:37,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-06 22:28:37,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565454239] [2023-11-06 22:28:37,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:28:37,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:28:37,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:28:37,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:28:37,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:28:38,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 508 [2023-11-06 22:28:38,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 165 transitions, 1700 flow. Second operand has 5 states, 5 states have (on average 209.6) internal successors, (1048), 5 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:38,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:38,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 508 [2023-11-06 22:28:38,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:39,174 INFO L124 PetriNetUnfolderBase]: 3197/4799 cut-off events. [2023-11-06 22:28:39,174 INFO L125 PetriNetUnfolderBase]: For 27305/27338 co-relation queries the response was YES. [2023-11-06 22:28:39,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22607 conditions, 4799 events. 3197/4799 cut-off events. For 27305/27338 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 25846 event pairs, 1097 based on Foata normal form. 57/3669 useless extension candidates. Maximal degree in co-relation 22546. Up to 4145 conditions per place. [2023-11-06 22:28:39,243 INFO L140 encePairwiseOnDemand]: 499/508 looper letters, 182 selfloop transitions, 26 changer transitions 0/211 dead transitions. [2023-11-06 22:28:39,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 211 transitions, 2451 flow [2023-11-06 22:28:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:28:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:28:39,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1111 transitions. [2023-11-06 22:28:39,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4374015748031496 [2023-11-06 22:28:39,245 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1111 transitions. [2023-11-06 22:28:39,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1111 transitions. [2023-11-06 22:28:39,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:39,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1111 transitions. [2023-11-06 22:28:39,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.2) internal successors, (1111), 5 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:39,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 508.0) internal successors, (3048), 6 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:39,250 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 508.0) internal successors, (3048), 6 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:39,250 INFO L175 Difference]: Start difference. First operand has 170 places, 165 transitions, 1700 flow. Second operand 5 states and 1111 transitions. [2023-11-06 22:28:39,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 211 transitions, 2451 flow [2023-11-06 22:28:39,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 211 transitions, 2384 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-11-06 22:28:39,331 INFO L231 Difference]: Finished difference. Result has 173 places, 171 transitions, 1812 flow [2023-11-06 22:28:39,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=1639, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1812, PETRI_PLACES=173, PETRI_TRANSITIONS=171} [2023-11-06 22:28:39,332 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 116 predicate places. [2023-11-06 22:28:39,332 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 171 transitions, 1812 flow [2023-11-06 22:28:39,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 209.6) internal successors, (1048), 5 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:39,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:39,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:39,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:28:39,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:39,539 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:28:39,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:39,540 INFO L85 PathProgramCache]: Analyzing trace with hash -890505758, now seen corresponding path program 2 times [2023-11-06 22:28:39,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:28:39,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854425149] [2023-11-06 22:28:39,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:39,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:28:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:28:40,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:28:40,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854425149] [2023-11-06 22:28:40,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854425149] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:28:40,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740964560] [2023-11-06 22:28:40,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:28:40,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:40,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:28:40,130 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:28:40,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:28:40,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:28:40,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:28:40,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:28:40,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:40,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-11-06 22:28:40,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:28:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:28:40,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:28:40,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740964560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:28:40,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:28:40,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-11-06 22:28:40,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766890228] [2023-11-06 22:28:40,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:28:40,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:28:40,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:28:40,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:28:40,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:28:40,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 508 [2023-11-06 22:28:40,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 171 transitions, 1812 flow. Second operand has 7 states, 7 states have (on average 198.85714285714286) internal successors, (1392), 7 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:40,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:40,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 508 [2023-11-06 22:28:40,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:42,062 INFO L124 PetriNetUnfolderBase]: 3400/5135 cut-off events. [2023-11-06 22:28:42,063 INFO L125 PetriNetUnfolderBase]: For 28365/28398 co-relation queries the response was YES. [2023-11-06 22:28:42,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24354 conditions, 5135 events. 3400/5135 cut-off events. For 28365/28398 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 28357 event pairs, 1114 based on Foata normal form. 46/3928 useless extension candidates. Maximal degree in co-relation 24291. Up to 4123 conditions per place. [2023-11-06 22:28:42,123 INFO L140 encePairwiseOnDemand]: 499/508 looper letters, 183 selfloop transitions, 31 changer transitions 0/217 dead transitions. [2023-11-06 22:28:42,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 217 transitions, 2577 flow [2023-11-06 22:28:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:28:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:28:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1258 transitions. [2023-11-06 22:28:42,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41272965879265094 [2023-11-06 22:28:42,126 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1258 transitions. [2023-11-06 22:28:42,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1258 transitions. [2023-11-06 22:28:42,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:42,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1258 transitions. [2023-11-06 22:28:42,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.66666666666666) internal successors, (1258), 6 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:42,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:42,132 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:42,132 INFO L175 Difference]: Start difference. First operand has 173 places, 171 transitions, 1812 flow. Second operand 6 states and 1258 transitions. [2023-11-06 22:28:42,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 217 transitions, 2577 flow [2023-11-06 22:28:42,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 217 transitions, 2510 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-11-06 22:28:42,228 INFO L231 Difference]: Finished difference. Result has 178 places, 175 transitions, 1906 flow [2023-11-06 22:28:42,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1906, PETRI_PLACES=178, PETRI_TRANSITIONS=175} [2023-11-06 22:28:42,229 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 121 predicate places. [2023-11-06 22:28:42,229 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 175 transitions, 1906 flow [2023-11-06 22:28:42,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 198.85714285714286) internal successors, (1392), 7 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:42,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:42,230 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:42,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:28:42,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:28:42,431 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:28:42,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:42,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1033007664, now seen corresponding path program 1 times [2023-11-06 22:28:42,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:28:42,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258278741] [2023-11-06 22:28:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:42,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:28:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:28:43,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:28:43,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258278741] [2023-11-06 22:28:43,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258278741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:28:43,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314559837] [2023-11-06 22:28:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:43,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:43,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:28:43,095 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:28:43,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:28:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:43,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:28:43,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:28:43,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:28:43,442 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:28:43,442 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 13 [2023-11-06 22:28:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:28:43,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314559837] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:28:43,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:28:43,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 12 [2023-11-06 22:28:43,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752755432] [2023-11-06 22:28:43,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:28:43,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:28:43,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:28:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:28:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:28:43,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 508 [2023-11-06 22:28:43,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 175 transitions, 1906 flow. Second operand has 5 states, 5 states have (on average 211.4) internal successors, (1057), 5 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:43,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:43,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 508 [2023-11-06 22:28:43,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:44,819 INFO L124 PetriNetUnfolderBase]: 3389/5118 cut-off events. [2023-11-06 22:28:44,819 INFO L125 PetriNetUnfolderBase]: For 28047/28080 co-relation queries the response was YES. [2023-11-06 22:28:44,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24465 conditions, 5118 events. 3389/5118 cut-off events. For 28047/28080 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 28120 event pairs, 539 based on Foata normal form. 75/3925 useless extension candidates. Maximal degree in co-relation 24400. Up to 3423 conditions per place. [2023-11-06 22:28:44,873 INFO L140 encePairwiseOnDemand]: 496/508 looper letters, 128 selfloop transitions, 78 changer transitions 0/209 dead transitions. [2023-11-06 22:28:44,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 209 transitions, 2579 flow [2023-11-06 22:28:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:28:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:28:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1112 transitions. [2023-11-06 22:28:44,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377952755905512 [2023-11-06 22:28:44,875 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1112 transitions. [2023-11-06 22:28:44,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1112 transitions. [2023-11-06 22:28:44,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:44,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1112 transitions. [2023-11-06 22:28:44,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.4) internal successors, (1112), 5 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:44,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 508.0) internal successors, (3048), 6 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:44,881 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 508.0) internal successors, (3048), 6 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:44,881 INFO L175 Difference]: Start difference. First operand has 178 places, 175 transitions, 1906 flow. Second operand 5 states and 1112 transitions. [2023-11-06 22:28:44,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 209 transitions, 2579 flow [2023-11-06 22:28:45,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 209 transitions, 2535 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 22:28:45,005 INFO L231 Difference]: Finished difference. Result has 182 places, 180 transitions, 2239 flow [2023-11-06 22:28:45,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2239, PETRI_PLACES=182, PETRI_TRANSITIONS=180} [2023-11-06 22:28:45,006 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 125 predicate places. [2023-11-06 22:28:45,006 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 180 transitions, 2239 flow [2023-11-06 22:28:45,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.4) internal successors, (1057), 5 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:45,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:45,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:45,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:28:45,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:28:45,207 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:28:45,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:45,207 INFO L85 PathProgramCache]: Analyzing trace with hash -452935571, now seen corresponding path program 2 times [2023-11-06 22:28:45,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:28:45,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115893113] [2023-11-06 22:28:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:45,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:28:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:28:45,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:28:45,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115893113] [2023-11-06 22:28:45,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115893113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:28:45,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191624379] [2023-11-06 22:28:45,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:28:45,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:45,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:28:45,962 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:28:45,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:28:46,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:28:46,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:28:46,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:28:46,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:46,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:46,297 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:28:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:28:46,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:28:46,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191624379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:28:46,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:28:46,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-06 22:28:46,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655428561] [2023-11-06 22:28:46,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:28:46,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:28:46,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:28:46,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:28:46,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:28:46,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 508 [2023-11-06 22:28:46,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 180 transitions, 2239 flow. Second operand has 7 states, 7 states have (on average 200.71428571428572) internal successors, (1405), 7 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:46,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:46,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 508 [2023-11-06 22:28:46,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:47,875 INFO L124 PetriNetUnfolderBase]: 3432/5189 cut-off events. [2023-11-06 22:28:47,875 INFO L125 PetriNetUnfolderBase]: For 42235/42268 co-relation queries the response was YES. [2023-11-06 22:28:47,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26911 conditions, 5189 events. 3432/5189 cut-off events. For 42235/42268 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 28729 event pairs, 968 based on Foata normal form. 141/4030 useless extension candidates. Maximal degree in co-relation 26843. Up to 3702 conditions per place. [2023-11-06 22:28:47,946 INFO L140 encePairwiseOnDemand]: 499/508 looper letters, 174 selfloop transitions, 36 changer transitions 0/213 dead transitions. [2023-11-06 22:28:47,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 213 transitions, 2939 flow [2023-11-06 22:28:47,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:28:47,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:28:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1264 transitions. [2023-11-06 22:28:47,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146981627296588 [2023-11-06 22:28:47,949 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1264 transitions. [2023-11-06 22:28:47,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1264 transitions. [2023-11-06 22:28:47,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:47,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1264 transitions. [2023-11-06 22:28:47,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 210.66666666666666) internal successors, (1264), 6 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:47,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:47,957 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:47,957 INFO L175 Difference]: Start difference. First operand has 182 places, 180 transitions, 2239 flow. Second operand 6 states and 1264 transitions. [2023-11-06 22:28:47,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 213 transitions, 2939 flow [2023-11-06 22:28:48,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 213 transitions, 2869 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-11-06 22:28:48,090 INFO L231 Difference]: Finished difference. Result has 187 places, 183 transitions, 2371 flow [2023-11-06 22:28:48,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2371, PETRI_PLACES=187, PETRI_TRANSITIONS=183} [2023-11-06 22:28:48,091 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 130 predicate places. [2023-11-06 22:28:48,091 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 183 transitions, 2371 flow [2023-11-06 22:28:48,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 200.71428571428572) internal successors, (1405), 7 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:48,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:48,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:48,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:28:48,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:28:48,294 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:28:48,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash -825114534, now seen corresponding path program 2 times [2023-11-06 22:28:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:28:48,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016973427] [2023-11-06 22:28:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:28:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:28:49,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:28:49,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016973427] [2023-11-06 22:28:49,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016973427] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:28:49,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739214508] [2023-11-06 22:28:49,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:28:49,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:49,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:28:49,096 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:28:49,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:28:49,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:28:49,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:28:49,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:28:49,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:49,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:49,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:28:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:28:49,482 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:28:49,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739214508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:28:49,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:28:49,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-06 22:28:49,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128346252] [2023-11-06 22:28:49,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:28:49,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:28:49,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:28:49,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:28:49,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:28:49,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 508 [2023-11-06 22:28:49,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 183 transitions, 2371 flow. Second operand has 7 states, 7 states have (on average 200.71428571428572) internal successors, (1405), 7 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:49,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:49,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 508 [2023-11-06 22:28:49,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:50,923 INFO L124 PetriNetUnfolderBase]: 3450/5201 cut-off events. [2023-11-06 22:28:50,923 INFO L125 PetriNetUnfolderBase]: For 37418/37451 co-relation queries the response was YES. [2023-11-06 22:28:50,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27419 conditions, 5201 events. 3450/5201 cut-off events. For 37418/37451 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 29061 event pairs, 808 based on Foata normal form. 41/3930 useless extension candidates. Maximal degree in co-relation 27349. Up to 3397 conditions per place. [2023-11-06 22:28:51,008 INFO L140 encePairwiseOnDemand]: 499/508 looper letters, 155 selfloop transitions, 57 changer transitions 0/215 dead transitions. [2023-11-06 22:28:51,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 215 transitions, 2985 flow [2023-11-06 22:28:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:28:51,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:28:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1266 transitions. [2023-11-06 22:28:51,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153543307086614 [2023-11-06 22:28:51,011 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1266 transitions. [2023-11-06 22:28:51,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1266 transitions. [2023-11-06 22:28:51,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:51,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1266 transitions. [2023-11-06 22:28:51,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:51,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:51,019 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:51,019 INFO L175 Difference]: Start difference. First operand has 187 places, 183 transitions, 2371 flow. Second operand 6 states and 1266 transitions. [2023-11-06 22:28:51,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 215 transitions, 2985 flow [2023-11-06 22:28:51,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 215 transitions, 2928 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-06 22:28:51,212 INFO L231 Difference]: Finished difference. Result has 190 places, 182 transitions, 2461 flow [2023-11-06 22:28:51,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2461, PETRI_PLACES=190, PETRI_TRANSITIONS=182} [2023-11-06 22:28:51,212 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 133 predicate places. [2023-11-06 22:28:51,213 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 182 transitions, 2461 flow [2023-11-06 22:28:51,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 200.71428571428572) internal successors, (1405), 7 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:51,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:51,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:51,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:28:51,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:28:51,414 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:28:51,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:51,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1445005790, now seen corresponding path program 1 times [2023-11-06 22:28:51,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:28:51,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043062689] [2023-11-06 22:28:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:51,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:28:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:28:52,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:28:52,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043062689] [2023-11-06 22:28:52,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043062689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:28:52,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134201192] [2023-11-06 22:28:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:52,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:28:52,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:28:52,335 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:28:52,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:28:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:52,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:28:52,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,573 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:28:52,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,587 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:28:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,618 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:28:52,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,632 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:28:52,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,665 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-06 22:28:52,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,688 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:28:52,777 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:28:52,869 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:28:52,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:28:52,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:28:53,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:53,048 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:28:53,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:53,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:28:53,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:53,311 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:28:53,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:28:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:28:53,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:28:53,940 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:28:53,940 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-11-06 22:28:53,963 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:28:53,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2449 treesize of output 2385 [2023-11-06 22:28:54,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 129 [2023-11-06 22:28:54,018 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 123 [2023-11-06 22:28:54,035 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 99 [2023-11-06 22:28:54,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 98 [2023-11-06 22:28:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:28:54,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134201192] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:28:54,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:28:54,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-11-06 22:28:54,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312159578] [2023-11-06 22:28:54,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:28:54,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:28:54,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:28:54,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:28:54,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=643, Unknown=8, NotChecked=0, Total=756 [2023-11-06 22:28:55,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 508 [2023-11-06 22:28:55,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 182 transitions, 2461 flow. Second operand has 28 states, 28 states have (on average 154.35714285714286) internal successors, (4322), 28 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:55,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:55,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 508 [2023-11-06 22:28:55,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:00,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:29:03,273 INFO L124 PetriNetUnfolderBase]: 3884/5932 cut-off events. [2023-11-06 22:29:03,274 INFO L125 PetriNetUnfolderBase]: For 62061/62103 co-relation queries the response was YES. [2023-11-06 22:29:03,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32434 conditions, 5932 events. 3884/5932 cut-off events. For 62061/62103 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 34080 event pairs, 520 based on Foata normal form. 54/4730 useless extension candidates. Maximal degree in co-relation 32363. Up to 2491 conditions per place. [2023-11-06 22:29:03,354 INFO L140 encePairwiseOnDemand]: 492/508 looper letters, 205 selfloop transitions, 112 changer transitions 0/320 dead transitions. [2023-11-06 22:29:03,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 320 transitions, 4361 flow [2023-11-06 22:29:03,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:29:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:29:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3051 transitions. [2023-11-06 22:29:03,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31610029009531704 [2023-11-06 22:29:03,360 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3051 transitions. [2023-11-06 22:29:03,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3051 transitions. [2023-11-06 22:29:03,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:03,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3051 transitions. [2023-11-06 22:29:03,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 160.57894736842104) internal successors, (3051), 19 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:03,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 508.0) internal successors, (10160), 20 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:03,378 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 508.0) internal successors, (10160), 20 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:03,378 INFO L175 Difference]: Start difference. First operand has 190 places, 182 transitions, 2461 flow. Second operand 19 states and 3051 transitions. [2023-11-06 22:29:03,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 320 transitions, 4361 flow [2023-11-06 22:29:03,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 320 transitions, 4303 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-06 22:29:03,544 INFO L231 Difference]: Finished difference. Result has 211 places, 233 transitions, 3664 flow [2023-11-06 22:29:03,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3664, PETRI_PLACES=211, PETRI_TRANSITIONS=233} [2023-11-06 22:29:03,545 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 154 predicate places. [2023-11-06 22:29:03,545 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 233 transitions, 3664 flow [2023-11-06 22:29:03,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 154.35714285714286) internal successors, (4322), 28 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:03,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:03,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:03,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:03,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:29:03,746 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:29:03,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:03,747 INFO L85 PathProgramCache]: Analyzing trace with hash 191417181, now seen corresponding path program 1 times [2023-11-06 22:29:03,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:03,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752930223] [2023-11-06 22:29:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:03,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:04,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:04,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752930223] [2023-11-06 22:29:04,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752930223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553225240] [2023-11-06 22:29:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:04,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:04,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:04,630 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:04,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:29:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:04,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:29:04,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:04,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:04,806 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 22:29:05,002 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:29:05,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:05,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:29:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:29:05,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:05,188 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_864 (Array Int Int))) (< 0 (+ 2147483648 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_864) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-11-06 22:29:05,205 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_864 (Array Int Int)) (v_ArrVal_863 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_863) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_864) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648))) is different from false [2023-11-06 22:29:05,220 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:05,220 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 80 [2023-11-06 22:29:05,228 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-11-06 22:29:05,235 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-11-06 22:29:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:29:05,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553225240] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:05,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:29:05,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 21 [2023-11-06 22:29:05,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122790451] [2023-11-06 22:29:05,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:05,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:29:05,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:05,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:29:05,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=364, Unknown=2, NotChecked=78, Total=506 [2023-11-06 22:29:05,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 508 [2023-11-06 22:29:05,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 233 transitions, 3664 flow. Second operand has 8 states, 8 states have (on average 183.625) internal successors, (1469), 8 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:05,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:05,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 508 [2023-11-06 22:29:05,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:06,997 INFO L124 PetriNetUnfolderBase]: 4011/6103 cut-off events. [2023-11-06 22:29:06,997 INFO L125 PetriNetUnfolderBase]: For 78552/78603 co-relation queries the response was YES. [2023-11-06 22:29:07,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38481 conditions, 6103 events. 4011/6103 cut-off events. For 78552/78603 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 34781 event pairs, 600 based on Foata normal form. 50/4879 useless extension candidates. Maximal degree in co-relation 38403. Up to 3787 conditions per place. [2023-11-06 22:29:07,073 INFO L140 encePairwiseOnDemand]: 490/508 looper letters, 157 selfloop transitions, 128 changer transitions 0/288 dead transitions. [2023-11-06 22:29:07,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 288 transitions, 4882 flow [2023-11-06 22:29:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:29:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:29:07,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1537 transitions. [2023-11-06 22:29:07,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3781988188976378 [2023-11-06 22:29:07,076 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1537 transitions. [2023-11-06 22:29:07,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1537 transitions. [2023-11-06 22:29:07,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:07,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1537 transitions. [2023-11-06 22:29:07,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 192.125) internal successors, (1537), 8 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:07,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 508.0) internal successors, (4572), 9 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:07,081 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 508.0) internal successors, (4572), 9 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:07,081 INFO L175 Difference]: Start difference. First operand has 211 places, 233 transitions, 3664 flow. Second operand 8 states and 1537 transitions. [2023-11-06 22:29:07,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 288 transitions, 4882 flow [2023-11-06 22:29:07,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 288 transitions, 4746 flow, removed 42 selfloop flow, removed 10 redundant places. [2023-11-06 22:29:07,357 INFO L231 Difference]: Finished difference. Result has 212 places, 257 transitions, 4444 flow [2023-11-06 22:29:07,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4444, PETRI_PLACES=212, PETRI_TRANSITIONS=257} [2023-11-06 22:29:07,358 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 155 predicate places. [2023-11-06 22:29:07,358 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 257 transitions, 4444 flow [2023-11-06 22:29:07,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 183.625) internal successors, (1469), 8 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:07,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:07,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:07,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:07,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:29:07,559 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:29:07,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:07,560 INFO L85 PathProgramCache]: Analyzing trace with hash -59161819, now seen corresponding path program 1 times [2023-11-06 22:29:07,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:07,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102345984] [2023-11-06 22:29:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:07,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:08,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:08,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102345984] [2023-11-06 22:29:08,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102345984] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:08,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209112967] [2023-11-06 22:29:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:08,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:08,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:08,061 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:08,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:29:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:08,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:29:08,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:08,225 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-11-06 22:29:08,517 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:29:08,599 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:29:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:08,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:08,941 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:08,942 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 80 [2023-11-06 22:29:08,950 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-11-06 22:29:08,958 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-11-06 22:29:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:09,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209112967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:09,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:29:09,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-06 22:29:09,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332733879] [2023-11-06 22:29:09,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:09,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:29:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:29:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=426, Unknown=2, NotChecked=0, Total=506 [2023-11-06 22:29:11,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:29:13,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:29:15,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:29:18,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:29:18,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 508 [2023-11-06 22:29:18,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 257 transitions, 4444 flow. Second operand has 23 states, 23 states have (on average 158.69565217391303) internal successors, (3650), 23 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:18,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:18,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 508 [2023-11-06 22:29:18,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:21,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:29:24,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:29:25,756 INFO L124 PetriNetUnfolderBase]: 3671/5634 cut-off events. [2023-11-06 22:29:25,756 INFO L125 PetriNetUnfolderBase]: For 109229/109280 co-relation queries the response was YES. [2023-11-06 22:29:25,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39684 conditions, 5634 events. 3671/5634 cut-off events. For 109229/109280 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 32262 event pairs, 844 based on Foata normal form. 83/4665 useless extension candidates. Maximal degree in co-relation 39601. Up to 2843 conditions per place. [2023-11-06 22:29:25,838 INFO L140 encePairwiseOnDemand]: 496/508 looper letters, 294 selfloop transitions, 74 changer transitions 1/372 dead transitions. [2023-11-06 22:29:25,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 372 transitions, 6029 flow [2023-11-06 22:29:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:29:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:29:25,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2833 transitions. [2023-11-06 22:29:25,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3280453913849004 [2023-11-06 22:29:25,843 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2833 transitions. [2023-11-06 22:29:25,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2833 transitions. [2023-11-06 22:29:25,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:25,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2833 transitions. [2023-11-06 22:29:25,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 166.64705882352942) internal successors, (2833), 17 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:25,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 508.0) internal successors, (9144), 18 states have internal predecessors, (9144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:25,852 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 508.0) internal successors, (9144), 18 states have internal predecessors, (9144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:25,852 INFO L175 Difference]: Start difference. First operand has 212 places, 257 transitions, 4444 flow. Second operand 17 states and 2833 transitions. [2023-11-06 22:29:25,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 372 transitions, 6029 flow [2023-11-06 22:29:26,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 372 transitions, 5914 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-06 22:29:26,222 INFO L231 Difference]: Finished difference. Result has 230 places, 264 transitions, 4742 flow [2023-11-06 22:29:26,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=4268, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4742, PETRI_PLACES=230, PETRI_TRANSITIONS=264} [2023-11-06 22:29:26,223 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 173 predicate places. [2023-11-06 22:29:26,223 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 264 transitions, 4742 flow [2023-11-06 22:29:26,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 158.69565217391303) internal successors, (3650), 23 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:26,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:26,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:26,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:26,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:29:26,431 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:29:26,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:26,432 INFO L85 PathProgramCache]: Analyzing trace with hash -890505908, now seen corresponding path program 1 times [2023-11-06 22:29:26,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:26,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643584667] [2023-11-06 22:29:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:26,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:26,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:26,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643584667] [2023-11-06 22:29:26,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643584667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:26,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462023705] [2023-11-06 22:29:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:26,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:26,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:26,847 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:26,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:29:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:26,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:29:26,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:27,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,029 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:29:27,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,048 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:29:27,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,064 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:29:27,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,078 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:29:27,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,105 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:29:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,136 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-06 22:29:27,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:29:27,301 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:29:27,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 22:29:27,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:29:27,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:29:27,449 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:29:27,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:27,569 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:29:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:29:27,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:28,446 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:28,446 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 59 [2023-11-06 22:29:28,474 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:28,475 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11444 treesize of output 11164 [2023-11-06 22:29:28,538 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:28,539 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 302 treesize of output 298 [2023-11-06 22:29:28,575 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:28,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 290 treesize of output 250 [2023-11-06 22:29:28,607 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:28,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 242 treesize of output 226 [2023-11-06 22:29:28,633 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 114 [2023-11-06 22:29:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:29:29,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462023705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:29,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:29:29,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-11-06 22:29:29,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156221075] [2023-11-06 22:29:29,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:29,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:29:29,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:29,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:29:29,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=540, Unknown=9, NotChecked=0, Total=650 [2023-11-06 22:29:31,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 508 [2023-11-06 22:29:31,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 264 transitions, 4742 flow. Second operand has 26 states, 26 states have (on average 154.5) internal successors, (4017), 26 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:31,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:31,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 508 [2023-11-06 22:29:31,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:34,454 INFO L124 PetriNetUnfolderBase]: 3594/5508 cut-off events. [2023-11-06 22:29:34,454 INFO L125 PetriNetUnfolderBase]: For 97030/97081 co-relation queries the response was YES. [2023-11-06 22:29:34,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38892 conditions, 5508 events. 3594/5508 cut-off events. For 97030/97081 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 31585 event pairs, 730 based on Foata normal form. 74/4578 useless extension candidates. Maximal degree in co-relation 38803. Up to 2130 conditions per place. [2023-11-06 22:29:34,545 INFO L140 encePairwiseOnDemand]: 495/508 looper letters, 271 selfloop transitions, 66 changer transitions 0/340 dead transitions. [2023-11-06 22:29:34,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 340 transitions, 5846 flow [2023-11-06 22:29:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:29:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:29:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2117 transitions. [2023-11-06 22:29:34,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3205632949727438 [2023-11-06 22:29:34,549 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2117 transitions. [2023-11-06 22:29:34,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2117 transitions. [2023-11-06 22:29:34,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:34,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2117 transitions. [2023-11-06 22:29:34,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 162.84615384615384) internal successors, (2117), 13 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:34,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 508.0) internal successors, (7112), 14 states have internal predecessors, (7112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:34,561 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 508.0) internal successors, (7112), 14 states have internal predecessors, (7112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:34,562 INFO L175 Difference]: Start difference. First operand has 230 places, 264 transitions, 4742 flow. Second operand 13 states and 2117 transitions. [2023-11-06 22:29:34,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 340 transitions, 5846 flow [2023-11-06 22:29:34,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 340 transitions, 5753 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-11-06 22:29:34,999 INFO L231 Difference]: Finished difference. Result has 231 places, 261 transitions, 4727 flow [2023-11-06 22:29:35,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4727, PETRI_PLACES=231, PETRI_TRANSITIONS=261} [2023-11-06 22:29:35,001 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 174 predicate places. [2023-11-06 22:29:35,001 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 261 transitions, 4727 flow [2023-11-06 22:29:35,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 154.5) internal successors, (4017), 26 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:35,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:35,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:35,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:35,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:29:35,208 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:29:35,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:35,209 INFO L85 PathProgramCache]: Analyzing trace with hash -80083697, now seen corresponding path program 1 times [2023-11-06 22:29:35,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:35,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887337210] [2023-11-06 22:29:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:35,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:29:35,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:35,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887337210] [2023-11-06 22:29:35,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887337210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:35,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:29:35,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:29:35,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109036689] [2023-11-06 22:29:35,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:35,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:29:35,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:35,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:29:35,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:29:35,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 508 [2023-11-06 22:29:35,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 261 transitions, 4727 flow. Second operand has 4 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:35,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:35,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 508 [2023-11-06 22:29:35,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:37,779 INFO L124 PetriNetUnfolderBase]: 4431/6698 cut-off events. [2023-11-06 22:29:37,780 INFO L125 PetriNetUnfolderBase]: For 167149/167198 co-relation queries the response was YES. [2023-11-06 22:29:37,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47952 conditions, 6698 events. 4431/6698 cut-off events. For 167149/167198 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 39033 event pairs, 901 based on Foata normal form. 117/5412 useless extension candidates. Maximal degree in co-relation 47880. Up to 2689 conditions per place. [2023-11-06 22:29:37,901 INFO L140 encePairwiseOnDemand]: 504/508 looper letters, 264 selfloop transitions, 69 changer transitions 0/338 dead transitions. [2023-11-06 22:29:37,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 338 transitions, 6551 flow [2023-11-06 22:29:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:29:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:29:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 959 transitions. [2023-11-06 22:29:37,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4719488188976378 [2023-11-06 22:29:37,904 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 959 transitions. [2023-11-06 22:29:37,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 959 transitions. [2023-11-06 22:29:37,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:37,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 959 transitions. [2023-11-06 22:29:37,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 239.75) internal successors, (959), 4 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:37,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 508.0) internal successors, (2540), 5 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:37,907 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 508.0) internal successors, (2540), 5 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:37,907 INFO L175 Difference]: Start difference. First operand has 231 places, 261 transitions, 4727 flow. Second operand 4 states and 959 transitions. [2023-11-06 22:29:37,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 338 transitions, 6551 flow [2023-11-06 22:29:38,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 338 transitions, 6193 flow, removed 9 selfloop flow, removed 15 redundant places. [2023-11-06 22:29:38,322 INFO L231 Difference]: Finished difference. Result has 215 places, 256 transitions, 4548 flow [2023-11-06 22:29:38,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=3900, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4548, PETRI_PLACES=215, PETRI_TRANSITIONS=256} [2023-11-06 22:29:38,323 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 158 predicate places. [2023-11-06 22:29:38,323 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 256 transitions, 4548 flow [2023-11-06 22:29:38,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:38,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:38,324 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:38,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-06 22:29:38,324 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:29:38,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:38,324 INFO L85 PathProgramCache]: Analyzing trace with hash -813070973, now seen corresponding path program 2 times [2023-11-06 22:29:38,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:38,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108335445] [2023-11-06 22:29:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:38,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:39,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:39,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108335445] [2023-11-06 22:29:39,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108335445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:39,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508909604] [2023-11-06 22:29:39,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:29:39,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:39,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:39,558 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:39,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:29:39,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:29:39,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:29:39,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:29:39,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:39,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:39,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:29:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:29:39,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:29:39,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508909604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:39,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:29:39,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2023-11-06 22:29:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976637425] [2023-11-06 22:29:39,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:39,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:29:39,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:39,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:29:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:29:40,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 508 [2023-11-06 22:29:40,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 256 transitions, 4548 flow. Second operand has 7 states, 7 states have (on average 198.71428571428572) internal successors, (1391), 7 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:40,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:40,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 508 [2023-11-06 22:29:40,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:41,934 INFO L124 PetriNetUnfolderBase]: 4300/6551 cut-off events. [2023-11-06 22:29:41,934 INFO L125 PetriNetUnfolderBase]: For 135588/135639 co-relation queries the response was YES. [2023-11-06 22:29:41,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47233 conditions, 6551 events. 4300/6551 cut-off events. For 135588/135639 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 37917 event pairs, 1428 based on Foata normal form. 122/5426 useless extension candidates. Maximal degree in co-relation 47164. Up to 5594 conditions per place. [2023-11-06 22:29:42,033 INFO L140 encePairwiseOnDemand]: 499/508 looper letters, 220 selfloop transitions, 61 changer transitions 0/284 dead transitions. [2023-11-06 22:29:42,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 284 transitions, 5401 flow [2023-11-06 22:29:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:29:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:29:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1245 transitions. [2023-11-06 22:29:42,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40846456692913385 [2023-11-06 22:29:42,037 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1245 transitions. [2023-11-06 22:29:42,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1245 transitions. [2023-11-06 22:29:42,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:42,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1245 transitions. [2023-11-06 22:29:42,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.5) internal successors, (1245), 6 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:42,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:42,043 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:42,043 INFO L175 Difference]: Start difference. First operand has 215 places, 256 transitions, 4548 flow. Second operand 6 states and 1245 transitions. [2023-11-06 22:29:42,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 284 transitions, 5401 flow [2023-11-06 22:29:42,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 284 transitions, 5265 flow, removed 51 selfloop flow, removed 2 redundant places. [2023-11-06 22:29:42,730 INFO L231 Difference]: Finished difference. Result has 219 places, 254 transitions, 4558 flow [2023-11-06 22:29:42,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=4372, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4558, PETRI_PLACES=219, PETRI_TRANSITIONS=254} [2023-11-06 22:29:42,730 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 162 predicate places. [2023-11-06 22:29:42,730 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 254 transitions, 4558 flow [2023-11-06 22:29:42,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 198.71428571428572) internal successors, (1391), 7 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:42,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:42,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:42,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:42,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:42,932 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:29:42,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:42,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1957915270, now seen corresponding path program 2 times [2023-11-06 22:29:42,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:42,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633520557] [2023-11-06 22:29:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:42,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:43,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:43,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633520557] [2023-11-06 22:29:43,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633520557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:43,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543808001] [2023-11-06 22:29:43,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:29:43,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:43,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:43,642 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:43,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:29:43,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:29:43,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:29:43,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:29:43,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:43,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:43,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:29:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:29:44,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:29:44,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543808001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:44,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:29:44,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-06 22:29:44,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671884305] [2023-11-06 22:29:44,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:44,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:29:44,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:29:44,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:29:44,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 508 [2023-11-06 22:29:44,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 254 transitions, 4558 flow. Second operand has 7 states, 7 states have (on average 200.85714285714286) internal successors, (1406), 7 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:44,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:44,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 508 [2023-11-06 22:29:44,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:46,283 INFO L124 PetriNetUnfolderBase]: 4452/6761 cut-off events. [2023-11-06 22:29:46,283 INFO L125 PetriNetUnfolderBase]: For 153112/153163 co-relation queries the response was YES. [2023-11-06 22:29:46,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47249 conditions, 6761 events. 4452/6761 cut-off events. For 153112/153163 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 39019 event pairs, 1230 based on Foata normal form. 116/5561 useless extension candidates. Maximal degree in co-relation 47179. Up to 4742 conditions per place. [2023-11-06 22:29:46,410 INFO L140 encePairwiseOnDemand]: 499/508 looper letters, 243 selfloop transitions, 47 changer transitions 0/293 dead transitions. [2023-11-06 22:29:46,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 293 transitions, 5583 flow [2023-11-06 22:29:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:29:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:29:46,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1262 transitions. [2023-11-06 22:29:46,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140419947506562 [2023-11-06 22:29:46,414 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1262 transitions. [2023-11-06 22:29:46,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1262 transitions. [2023-11-06 22:29:46,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:46,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1262 transitions. [2023-11-06 22:29:46,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 210.33333333333334) internal successors, (1262), 6 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:46,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:46,421 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:46,421 INFO L175 Difference]: Start difference. First operand has 219 places, 254 transitions, 4558 flow. Second operand 6 states and 1262 transitions. [2023-11-06 22:29:46,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 293 transitions, 5583 flow [2023-11-06 22:29:46,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 293 transitions, 5484 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-06 22:29:46,854 INFO L231 Difference]: Finished difference. Result has 221 places, 258 transitions, 4702 flow [2023-11-06 22:29:46,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=4459, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4702, PETRI_PLACES=221, PETRI_TRANSITIONS=258} [2023-11-06 22:29:46,855 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 164 predicate places. [2023-11-06 22:29:46,855 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 258 transitions, 4702 flow [2023-11-06 22:29:46,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 200.85714285714286) internal successors, (1406), 7 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:46,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:46,856 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:46,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:47,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:47,057 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:29:47,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:47,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1251028743, now seen corresponding path program 2 times [2023-11-06 22:29:47,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:47,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118174858] [2023-11-06 22:29:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:47,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:47,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:47,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118174858] [2023-11-06 22:29:47,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118174858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:47,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347591022] [2023-11-06 22:29:47,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:29:47,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:47,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:47,986 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:48,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:29:48,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:29:48,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:29:48,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:29:48,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:48,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:48,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:29:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:29:48,357 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:29:48,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347591022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:48,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:29:48,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-11-06 22:29:48,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654356743] [2023-11-06 22:29:48,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:48,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:29:48,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:48,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:29:48,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:29:48,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 508 [2023-11-06 22:29:48,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 258 transitions, 4702 flow. Second operand has 7 states, 7 states have (on average 200.85714285714286) internal successors, (1406), 7 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:48,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:48,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 508 [2023-11-06 22:29:48,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:50,436 INFO L124 PetriNetUnfolderBase]: 4665/7095 cut-off events. [2023-11-06 22:29:50,436 INFO L125 PetriNetUnfolderBase]: For 135386/135437 co-relation queries the response was YES. [2023-11-06 22:29:50,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48944 conditions, 7095 events. 4665/7095 cut-off events. For 135386/135437 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 41659 event pairs, 902 based on Foata normal form. 55/5669 useless extension candidates. Maximal degree in co-relation 48873. Up to 4075 conditions per place. [2023-11-06 22:29:50,540 INFO L140 encePairwiseOnDemand]: 499/508 looper letters, 223 selfloop transitions, 71 changer transitions 0/297 dead transitions. [2023-11-06 22:29:50,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 297 transitions, 5683 flow [2023-11-06 22:29:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:29:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:29:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1269 transitions. [2023-11-06 22:29:50,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41633858267716534 [2023-11-06 22:29:50,542 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1269 transitions. [2023-11-06 22:29:50,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1269 transitions. [2023-11-06 22:29:50,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:50,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1269 transitions. [2023-11-06 22:29:50,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 211.5) internal successors, (1269), 6 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:50,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:50,547 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:50,547 INFO L175 Difference]: Start difference. First operand has 221 places, 258 transitions, 4702 flow. Second operand 6 states and 1269 transitions. [2023-11-06 22:29:50,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 297 transitions, 5683 flow [2023-11-06 22:29:50,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 297 transitions, 5631 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:29:50,993 INFO L231 Difference]: Finished difference. Result has 226 places, 261 transitions, 5003 flow [2023-11-06 22:29:50,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=4650, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5003, PETRI_PLACES=226, PETRI_TRANSITIONS=261} [2023-11-06 22:29:50,993 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 169 predicate places. [2023-11-06 22:29:50,993 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 261 transitions, 5003 flow [2023-11-06 22:29:50,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 200.85714285714286) internal successors, (1406), 7 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:50,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:50,994 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:51,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:51,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:51,194 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:29:51,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:51,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1251028742, now seen corresponding path program 2 times [2023-11-06 22:29:51,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:51,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936894393] [2023-11-06 22:29:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:51,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:52,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:52,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936894393] [2023-11-06 22:29:52,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936894393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:52,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397874372] [2023-11-06 22:29:52,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:29:52,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:52,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:52,022 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:52,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:29:52,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:29:52,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:29:52,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:29:52,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:52,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:52,311 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:29:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:29:52,354 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:29:52,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397874372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:52,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:29:52,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-11-06 22:29:52,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404681772] [2023-11-06 22:29:52,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:52,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:29:52,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:52,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:29:52,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:29:52,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 508 [2023-11-06 22:29:52,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 261 transitions, 5003 flow. Second operand has 7 states, 7 states have (on average 199.85714285714286) internal successors, (1399), 7 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:52,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:52,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 508 [2023-11-06 22:29:52,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:54,421 INFO L124 PetriNetUnfolderBase]: 4644/7070 cut-off events. [2023-11-06 22:29:54,421 INFO L125 PetriNetUnfolderBase]: For 146892/146943 co-relation queries the response was YES. [2023-11-06 22:29:54,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50420 conditions, 7070 events. 4644/7070 cut-off events. For 146892/146943 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 41137 event pairs, 1266 based on Foata normal form. 65/5651 useless extension candidates. Maximal degree in co-relation 50346. Up to 4767 conditions per place. [2023-11-06 22:29:54,548 INFO L140 encePairwiseOnDemand]: 498/508 looper letters, 232 selfloop transitions, 51 changer transitions 0/286 dead transitions. [2023-11-06 22:29:54,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 286 transitions, 5738 flow [2023-11-06 22:29:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:29:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:29:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1254 transitions. [2023-11-06 22:29:54,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41141732283464566 [2023-11-06 22:29:54,552 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1254 transitions. [2023-11-06 22:29:54,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1254 transitions. [2023-11-06 22:29:54,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:54,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1254 transitions. [2023-11-06 22:29:54,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:54,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:54,556 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:54,556 INFO L175 Difference]: Start difference. First operand has 226 places, 261 transitions, 5003 flow. Second operand 6 states and 1254 transitions. [2023-11-06 22:29:54,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 286 transitions, 5738 flow [2023-11-06 22:29:55,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 286 transitions, 5653 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-06 22:29:55,038 INFO L231 Difference]: Finished difference. Result has 228 places, 258 transitions, 4952 flow [2023-11-06 22:29:55,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=4793, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4952, PETRI_PLACES=228, PETRI_TRANSITIONS=258} [2023-11-06 22:29:55,040 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 171 predicate places. [2023-11-06 22:29:55,040 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 258 transitions, 4952 flow [2023-11-06 22:29:55,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 199.85714285714286) internal successors, (1399), 7 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:55,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:55,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:55,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:55,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:55,243 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:29:55,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:55,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1155936704, now seen corresponding path program 3 times [2023-11-06 22:29:55,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:55,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424489722] [2023-11-06 22:29:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:55,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:56,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:29:56,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424489722] [2023-11-06 22:29:56,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424489722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:56,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934965274] [2023-11-06 22:29:56,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:29:56,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:56,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:29:56,082 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:29:56,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:29:56,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:29:56,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:29:56,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:29:56,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:56,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:56,436 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:29:56,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:56,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:29:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:29:56,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:29:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934965274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:29:56,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:29:56,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-11-06 22:29:56,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693040447] [2023-11-06 22:29:56,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:56,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:29:56,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:29:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:29:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:29:56,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 508 [2023-11-06 22:29:56,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 258 transitions, 4952 flow. Second operand has 8 states, 8 states have (on average 196.625) internal successors, (1573), 8 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:56,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:56,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 508 [2023-11-06 22:29:56,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:58,817 INFO L124 PetriNetUnfolderBase]: 4568/7058 cut-off events. [2023-11-06 22:29:58,818 INFO L125 PetriNetUnfolderBase]: For 147395/147446 co-relation queries the response was YES. [2023-11-06 22:29:58,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49680 conditions, 7058 events. 4568/7058 cut-off events. For 147395/147446 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 42532 event pairs, 1524 based on Foata normal form. 86/5642 useless extension candidates. Maximal degree in co-relation 49606. Up to 5170 conditions per place. [2023-11-06 22:29:58,921 INFO L140 encePairwiseOnDemand]: 500/508 looper letters, 221 selfloop transitions, 70 changer transitions 0/294 dead transitions. [2023-11-06 22:29:58,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 294 transitions, 5831 flow [2023-11-06 22:29:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:29:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:29:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1246 transitions. [2023-11-06 22:29:58,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40879265091863515 [2023-11-06 22:29:58,924 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1246 transitions. [2023-11-06 22:29:58,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1246 transitions. [2023-11-06 22:29:58,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:58,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1246 transitions. [2023-11-06 22:29:58,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.66666666666666) internal successors, (1246), 6 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:58,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:58,929 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:58,929 INFO L175 Difference]: Start difference. First operand has 228 places, 258 transitions, 4952 flow. Second operand 6 states and 1246 transitions. [2023-11-06 22:29:58,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 294 transitions, 5831 flow [2023-11-06 22:29:59,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 294 transitions, 5777 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-06 22:29:59,427 INFO L231 Difference]: Finished difference. Result has 231 places, 257 transitions, 5068 flow [2023-11-06 22:29:59,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=4874, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5068, PETRI_PLACES=231, PETRI_TRANSITIONS=257} [2023-11-06 22:29:59,428 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 174 predicate places. [2023-11-06 22:29:59,428 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 257 transitions, 5068 flow [2023-11-06 22:29:59,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 196.625) internal successors, (1573), 8 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:59,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:59,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:59,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:59,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:29:59,629 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:29:59,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:59,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1155936854, now seen corresponding path program 3 times [2023-11-06 22:29:59,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:29:59,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364278651] [2023-11-06 22:29:59,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:59,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:29:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:00,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:00,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364278651] [2023-11-06 22:30:00,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364278651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:00,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658194302] [2023-11-06 22:30:00,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:30:00,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:00,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:00,354 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:00,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:30:00,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:30:00,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:00,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:30:00,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:00,544 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-11-06 22:30:00,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:30:00,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:30:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:30:00,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:00,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658194302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:00,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:30:00,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-11-06 22:30:00,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731670990] [2023-11-06 22:30:00,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:00,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:30:00,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:00,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:30:00,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:30:00,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 508 [2023-11-06 22:30:00,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 257 transitions, 5068 flow. Second operand has 8 states, 8 states have (on average 198.625) internal successors, (1589), 8 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:00,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:00,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 508 [2023-11-06 22:30:00,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:02,807 INFO L124 PetriNetUnfolderBase]: 4569/6999 cut-off events. [2023-11-06 22:30:02,807 INFO L125 PetriNetUnfolderBase]: For 178158/178209 co-relation queries the response was YES. [2023-11-06 22:30:02,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50525 conditions, 6999 events. 4569/6999 cut-off events. For 178158/178209 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 41434 event pairs, 1425 based on Foata normal form. 94/5585 useless extension candidates. Maximal degree in co-relation 50449. Up to 3831 conditions per place. [2023-11-06 22:30:02,944 INFO L140 encePairwiseOnDemand]: 500/508 looper letters, 220 selfloop transitions, 62 changer transitions 0/285 dead transitions. [2023-11-06 22:30:02,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 285 transitions, 5899 flow [2023-11-06 22:30:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:30:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:30:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1250 transitions. [2023-11-06 22:30:02,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41010498687664043 [2023-11-06 22:30:02,947 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1250 transitions. [2023-11-06 22:30:02,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1250 transitions. [2023-11-06 22:30:02,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:02,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1250 transitions. [2023-11-06 22:30:02,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 208.33333333333334) internal successors, (1250), 6 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:02,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:02,952 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:02,952 INFO L175 Difference]: Start difference. First operand has 231 places, 257 transitions, 5068 flow. Second operand 6 states and 1250 transitions. [2023-11-06 22:30:02,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 285 transitions, 5899 flow [2023-11-06 22:30:03,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 285 transitions, 5774 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-11-06 22:30:03,550 INFO L231 Difference]: Finished difference. Result has 232 places, 257 transitions, 5127 flow [2023-11-06 22:30:03,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=4887, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5127, PETRI_PLACES=232, PETRI_TRANSITIONS=257} [2023-11-06 22:30:03,550 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 175 predicate places. [2023-11-06 22:30:03,550 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 257 transitions, 5127 flow [2023-11-06 22:30:03,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 198.625) internal successors, (1589), 8 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:03,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:03,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:03,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:03,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:03,752 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:30:03,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash 191417182, now seen corresponding path program 3 times [2023-11-06 22:30:03,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:03,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624533864] [2023-11-06 22:30:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:03,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:05,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:05,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624533864] [2023-11-06 22:30:05,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624533864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:05,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31699085] [2023-11-06 22:30:05,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:30:05,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:05,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:05,452 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:05,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:30:05,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:30:05,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:05,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:30:05,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:05,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:05,863 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:30:05,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:05,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:30:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:30:05,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:05,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31699085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:05,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:30:05,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-11-06 22:30:05,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746356992] [2023-11-06 22:30:05,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:05,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:30:05,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:05,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:30:05,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:30:06,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 508 [2023-11-06 22:30:06,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 257 transitions, 5127 flow. Second operand has 8 states, 8 states have (on average 197.625) internal successors, (1581), 8 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:06,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:06,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 508 [2023-11-06 22:30:06,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:08,195 INFO L124 PetriNetUnfolderBase]: 4622/7063 cut-off events. [2023-11-06 22:30:08,195 INFO L125 PetriNetUnfolderBase]: For 157654/157705 co-relation queries the response was YES. [2023-11-06 22:30:08,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51128 conditions, 7063 events. 4622/7063 cut-off events. For 157654/157705 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 41937 event pairs, 1425 based on Foata normal form. 60/5579 useless extension candidates. Maximal degree in co-relation 51053. Up to 4733 conditions per place. [2023-11-06 22:30:08,335 INFO L140 encePairwiseOnDemand]: 499/508 looper letters, 233 selfloop transitions, 44 changer transitions 0/280 dead transitions. [2023-11-06 22:30:08,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 280 transitions, 5800 flow [2023-11-06 22:30:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:30:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:30:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1242 transitions. [2023-11-06 22:30:08,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074803149606299 [2023-11-06 22:30:08,338 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1242 transitions. [2023-11-06 22:30:08,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1242 transitions. [2023-11-06 22:30:08,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:08,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1242 transitions. [2023-11-06 22:30:08,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:08,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:08,343 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:08,343 INFO L175 Difference]: Start difference. First operand has 232 places, 257 transitions, 5127 flow. Second operand 6 states and 1242 transitions. [2023-11-06 22:30:08,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 280 transitions, 5800 flow [2023-11-06 22:30:09,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 280 transitions, 5623 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-06 22:30:09,072 INFO L231 Difference]: Finished difference. Result has 231 places, 254 transitions, 4939 flow [2023-11-06 22:30:09,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=4851, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4939, PETRI_PLACES=231, PETRI_TRANSITIONS=254} [2023-11-06 22:30:09,072 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 174 predicate places. [2023-11-06 22:30:09,073 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 254 transitions, 4939 flow [2023-11-06 22:30:09,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 197.625) internal successors, (1581), 8 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:09,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:09,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:09,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:09,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-06 22:30:09,274 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:30:09,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:09,275 INFO L85 PathProgramCache]: Analyzing trace with hash 714250690, now seen corresponding path program 1 times [2023-11-06 22:30:09,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:09,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658100967] [2023-11-06 22:30:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:09,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:09,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:09,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658100967] [2023-11-06 22:30:09,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658100967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:09,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181926343] [2023-11-06 22:30:09,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:09,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:09,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:09,694 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:09,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:30:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:09,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:30:09,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:10,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:10,228 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:10,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-11-06 22:30:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:10,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181926343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:10,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:10,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-06 22:30:10,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700592823] [2023-11-06 22:30:10,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:10,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:30:10,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:10,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:30:10,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:30:11,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 508 [2023-11-06 22:30:11,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 254 transitions, 4939 flow. Second operand has 17 states, 17 states have (on average 186.47058823529412) internal successors, (3170), 17 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:11,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:11,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 508 [2023-11-06 22:30:11,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:19,543 INFO L124 PetriNetUnfolderBase]: 14172/21809 cut-off events. [2023-11-06 22:30:19,543 INFO L125 PetriNetUnfolderBase]: For 547489/547549 co-relation queries the response was YES. [2023-11-06 22:30:19,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162532 conditions, 21809 events. 14172/21809 cut-off events. For 547489/547549 co-relation queries the response was YES. Maximal size of possible extension queue 1386. Compared 151208 event pairs, 1022 based on Foata normal form. 154/17502 useless extension candidates. Maximal degree in co-relation 162459. Up to 8837 conditions per place. [2023-11-06 22:30:20,002 INFO L140 encePairwiseOnDemand]: 488/508 looper letters, 548 selfloop transitions, 139 changer transitions 3/695 dead transitions. [2023-11-06 22:30:20,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 695 transitions, 14613 flow [2023-11-06 22:30:20,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:30:20,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:30:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4147 transitions. [2023-11-06 22:30:20,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3887326584176978 [2023-11-06 22:30:20,010 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4147 transitions. [2023-11-06 22:30:20,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4147 transitions. [2023-11-06 22:30:20,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:20,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4147 transitions. [2023-11-06 22:30:20,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 197.47619047619048) internal successors, (4147), 21 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:20,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 508.0) internal successors, (11176), 22 states have internal predecessors, (11176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:20,034 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 508.0) internal successors, (11176), 22 states have internal predecessors, (11176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:20,035 INFO L175 Difference]: Start difference. First operand has 231 places, 254 transitions, 4939 flow. Second operand 21 states and 4147 transitions. [2023-11-06 22:30:20,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 695 transitions, 14613 flow [2023-11-06 22:30:21,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 695 transitions, 14571 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-06 22:30:21,558 INFO L231 Difference]: Finished difference. Result has 261 places, 340 transitions, 7044 flow [2023-11-06 22:30:21,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7044, PETRI_PLACES=261, PETRI_TRANSITIONS=340} [2023-11-06 22:30:21,559 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 204 predicate places. [2023-11-06 22:30:21,559 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 340 transitions, 7044 flow [2023-11-06 22:30:21,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 186.47058823529412) internal successors, (3170), 17 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:21,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:21,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:21,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:21,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 22:30:21,760 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-06 22:30:21,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:21,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1035347460, now seen corresponding path program 1 times [2023-11-06 22:30:21,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:21,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144101139] [2023-11-06 22:30:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:21,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:22,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:22,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144101139] [2023-11-06 22:30:22,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144101139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:22,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490591377] [2023-11-06 22:30:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:22,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:22,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:22,245 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:22,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d299b4c-f6ed-4a72-9759-b9e16b9e8c1e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:30:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:22,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:30:22,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:22,539 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:30:22,592 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:30:22,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:30:22,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:22,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:30:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:22,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:23,354 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:23,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2023-11-06 22:30:23,368 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:23,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1511 treesize of output 1439 [2023-11-06 22:30:23,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2023-11-06 22:30:23,418 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:23,418 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 97 [2023-11-06 22:30:23,447 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:23,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 84 [2023-11-06 22:30:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:23,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490591377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:23,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:23,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-11-06 22:30:23,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308677609] [2023-11-06 22:30:23,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:23,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:30:23,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:23,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:30:23,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=388, Unknown=2, NotChecked=0, Total=462 [2023-11-06 22:30:26,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:30:27,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 508 [2023-11-06 22:30:27,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 340 transitions, 7044 flow. Second operand has 22 states, 22 states have (on average 149.9090909090909) internal successors, (3298), 22 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:27,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:27,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 508 [2023-11-06 22:30:27,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand