./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/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_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:30:05,191 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:30:05,324 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:30:05,334 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:30:05,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:30:05,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:30:05,376 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:30:05,377 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:30:05,378 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:30:05,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:30:05,385 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:30:05,385 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:30:05,386 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:30:05,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:30:05,389 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:30:05,389 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:30:05,390 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:30:05,391 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:30:05,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:30:05,392 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:30:05,393 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:30:05,393 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:30:05,394 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:30:05,395 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:30:05,395 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:30:05,396 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:30:05,397 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:30:05,397 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:30:05,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:30:05,398 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:30:05,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:30:05,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:30:05,401 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:30:05,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:30:05,401 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:30:05,402 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:30:05,402 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:30:05,402 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:30:05,403 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:30:05,403 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_8df68c6f-b636-4647-9558-9e6479f2ff1c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 [2023-11-06 22:30:05,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:30:05,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:30:05,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:30:05,827 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:30:05,827 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:30:05,829 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-06 22:30:08,915 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:30:09,129 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:30:09,129 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-06 22:30:09,142 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/data/dba96b995/eac3a1ed0b3644cda3ce9bc190ea341c/FLAG095172f5c [2023-11-06 22:30:09,160 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/data/dba96b995/eac3a1ed0b3644cda3ce9bc190ea341c [2023-11-06 22:30:09,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:30:09,165 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:30:09,170 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:30:09,171 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:30:09,177 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:30:09,178 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,179 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e50f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09, skipping insertion in model container [2023-11-06 22:30:09,180 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,220 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:30:09,404 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2023-11-06 22:30:09,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:30:09,429 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:30:09,456 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2023-11-06 22:30:09,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:30:09,479 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:30:09,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09 WrapperNode [2023-11-06 22:30:09,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:30:09,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:30:09,481 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:30:09,482 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:30:09,490 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,500 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,539 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 287 [2023-11-06 22:30:09,539 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:30:09,540 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:30:09,540 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:30:09,540 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:30:09,550 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,556 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,557 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,570 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,575 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,579 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,581 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,586 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:30:09,587 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:30:09,587 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:30:09,587 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:30:09,588 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09" (1/1) ... [2023-11-06 22:30:09,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:30:09,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:09,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:30:09,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:30:09,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:30:09,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:30:09,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:30:09,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:30:09,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:30:09,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:30:09,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:30:09,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:30:09,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:30:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:30:09,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:30:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:30:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:30:09,748 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 22:30:09,947 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:30:09,950 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:30:10,607 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:30:10,623 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:30:10,624 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:30:10,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:10 BoogieIcfgContainer [2023-11-06 22:30:10,628 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:30:10,630 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:30:10,630 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:30:10,634 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:30:10,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:09" (1/3) ... [2023-11-06 22:30:10,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3170dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:10, skipping insertion in model container [2023-11-06 22:30:10,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:09" (2/3) ... [2023-11-06 22:30:10,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3170dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:10, skipping insertion in model container [2023-11-06 22:30:10,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:10" (3/3) ... [2023-11-06 22:30:10,637 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-11-06 22:30:10,647 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:30:10,660 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:30:10,660 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:30:10,660 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:30:10,842 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:30:10,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 382 places, 403 transitions, 820 flow [2023-11-06 22:30:11,236 INFO L124 PetriNetUnfolderBase]: 28/401 cut-off events. [2023-11-06 22:30:11,237 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:30:11,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 401 events. 28/401 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 926 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 271. Up to 2 conditions per place. [2023-11-06 22:30:11,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 382 places, 403 transitions, 820 flow [2023-11-06 22:30:11,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 371 places, 392 transitions, 796 flow [2023-11-06 22:30:11,280 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:30:11,304 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 371 places, 392 transitions, 796 flow [2023-11-06 22:30:11,311 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 371 places, 392 transitions, 796 flow [2023-11-06 22:30:11,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 371 places, 392 transitions, 796 flow [2023-11-06 22:30:11,464 INFO L124 PetriNetUnfolderBase]: 28/392 cut-off events. [2023-11-06 22:30:11,464 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:30:11,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 392 events. 28/392 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 920 event pairs, 0 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 271. Up to 2 conditions per place. [2023-11-06 22:30:11,499 INFO L119 LiptonReduction]: Number of co-enabled transitions 37700 [2023-11-06 22:30:25,422 INFO L134 LiptonReduction]: Checked pairs total: 31362 [2023-11-06 22:30:25,423 INFO L136 LiptonReduction]: Total number of compositions: 480 [2023-11-06 22:30:25,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:30:25,459 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;@22987ddf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:30:25,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:30:25,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:30:25,470 INFO L124 PetriNetUnfolderBase]: 4/17 cut-off events. [2023-11-06 22:30:25,470 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:30:25,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:25,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:25,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:30:25,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:25,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1925864811, now seen corresponding path program 1 times [2023-11-06 22:30:25,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:25,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644046904] [2023-11-06 22:30:25,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:25,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:26,177 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 22:30:26,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:26,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644046904] [2023-11-06 22:30:26,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644046904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:26,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:26,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:30:26,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588525896] [2023-11-06 22:30:26,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:26,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:30:26,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:26,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:30:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:30:26,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 883 [2023-11-06 22:30:26,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 361.4) internal successors, (1807), 5 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:26,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:26,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 883 [2023-11-06 22:30:26,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:26,658 INFO L124 PetriNetUnfolderBase]: 148/237 cut-off events. [2023-11-06 22:30:26,659 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-06 22:30:26,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 237 events. 148/237 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 713 event pairs, 21 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 438. Up to 127 conditions per place. [2023-11-06 22:30:26,662 INFO L140 encePairwiseOnDemand]: 876/883 looper letters, 38 selfloop transitions, 12 changer transitions 1/51 dead transitions. [2023-11-06 22:30:26,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 51 transitions, 231 flow [2023-11-06 22:30:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:30:26,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:30:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1847 transitions. [2023-11-06 22:30:26,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41834654586636466 [2023-11-06 22:30:26,695 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1847 transitions. [2023-11-06 22:30:26,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1847 transitions. [2023-11-06 22:30:26,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:26,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1847 transitions. [2023-11-06 22:30:26,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 369.4) internal successors, (1847), 5 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:26,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 883.0) internal successors, (5298), 6 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:26,735 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 883.0) internal successors, (5298), 6 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:26,737 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 48 flow. Second operand 5 states and 1847 transitions. [2023-11-06 22:30:26,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 51 transitions, 231 flow [2023-11-06 22:30:26,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 51 transitions, 213 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:30:26,745 INFO L231 Difference]: Finished difference. Result has 24 places, 29 transitions, 117 flow [2023-11-06 22:30:26,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=24, PETRI_TRANSITIONS=29} [2023-11-06 22:30:26,752 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-11-06 22:30:26,752 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 29 transitions, 117 flow [2023-11-06 22:30:26,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 361.4) internal successors, (1807), 5 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:26,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:26,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:26,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:30:26,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:30:26,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:26,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1779876675, now seen corresponding path program 1 times [2023-11-06 22:30:26,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:26,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840741161] [2023-11-06 22:30:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:26,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:26,982 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 22:30:26,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:26,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840741161] [2023-11-06 22:30:26,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840741161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:26,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:26,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:30:26,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87303542] [2023-11-06 22:30:26,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:26,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:30:26,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:26,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:30:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:30:27,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 883 [2023-11-06 22:30:27,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 29 transitions, 117 flow. Second operand has 4 states, 4 states have (on average 366.25) internal successors, (1465), 4 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:27,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:27,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 883 [2023-11-06 22:30:27,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:27,217 INFO L124 PetriNetUnfolderBase]: 224/363 cut-off events. [2023-11-06 22:30:27,217 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-11-06 22:30:27,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 363 events. 224/363 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1237 event pairs, 96 based on Foata normal form. 20/335 useless extension candidates. Maximal degree in co-relation 623. Up to 209 conditions per place. [2023-11-06 22:30:27,221 INFO L140 encePairwiseOnDemand]: 878/883 looper letters, 42 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2023-11-06 22:30:27,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 48 transitions, 285 flow [2023-11-06 22:30:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:30:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:30:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1485 transitions. [2023-11-06 22:30:27,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42044167610419025 [2023-11-06 22:30:27,231 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1485 transitions. [2023-11-06 22:30:27,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1485 transitions. [2023-11-06 22:30:27,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:27,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1485 transitions. [2023-11-06 22:30:27,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 371.25) internal successors, (1485), 4 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:27,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 883.0) internal successors, (4415), 5 states have internal predecessors, (4415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:27,253 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 883.0) internal successors, (4415), 5 states have internal predecessors, (4415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:27,254 INFO L175 Difference]: Start difference. First operand has 24 places, 29 transitions, 117 flow. Second operand 4 states and 1485 transitions. [2023-11-06 22:30:27,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 48 transitions, 285 flow [2023-11-06 22:30:27,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 48 transitions, 283 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-06 22:30:27,264 INFO L231 Difference]: Finished difference. Result has 30 places, 33 transitions, 171 flow [2023-11-06 22:30:27,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=30, PETRI_TRANSITIONS=33} [2023-11-06 22:30:27,266 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-11-06 22:30:27,267 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 33 transitions, 171 flow [2023-11-06 22:30:27,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 366.25) internal successors, (1465), 4 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:27,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:27,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:27,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:30:27,276 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:30:27,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:27,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1887681417, now seen corresponding path program 1 times [2023-11-06 22:30:27,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:27,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834131735] [2023-11-06 22:30:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:27,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:27,509 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 22:30:27,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:27,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834131735] [2023-11-06 22:30:27,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834131735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:27,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:27,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:30:27,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777484465] [2023-11-06 22:30:27,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:27,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:30:27,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:27,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:30:27,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:30:27,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 883 [2023-11-06 22:30:27,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 33 transitions, 171 flow. Second operand has 4 states, 4 states have (on average 366.5) internal successors, (1466), 4 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:27,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:27,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 883 [2023-11-06 22:30:27,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:27,709 INFO L124 PetriNetUnfolderBase]: 158/261 cut-off events. [2023-11-06 22:30:27,709 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2023-11-06 22:30:27,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 261 events. 158/261 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 818 event pairs, 63 based on Foata normal form. 6/247 useless extension candidates. Maximal degree in co-relation 795. Up to 172 conditions per place. [2023-11-06 22:30:27,712 INFO L140 encePairwiseOnDemand]: 877/883 looper letters, 34 selfloop transitions, 4 changer transitions 4/42 dead transitions. [2023-11-06 22:30:27,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 298 flow [2023-11-06 22:30:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:30:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:30:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1481 transitions. [2023-11-06 22:30:27,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41930917327293316 [2023-11-06 22:30:27,719 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1481 transitions. [2023-11-06 22:30:27,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1481 transitions. [2023-11-06 22:30:27,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:27,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1481 transitions. [2023-11-06 22:30:27,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 370.25) internal successors, (1481), 4 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:27,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 883.0) internal successors, (4415), 5 states have internal predecessors, (4415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:27,740 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 883.0) internal successors, (4415), 5 states have internal predecessors, (4415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:27,740 INFO L175 Difference]: Start difference. First operand has 30 places, 33 transitions, 171 flow. Second operand 4 states and 1481 transitions. [2023-11-06 22:30:27,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 298 flow [2023-11-06 22:30:27,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 296 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-06 22:30:27,745 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 159 flow [2023-11-06 22:30:27,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-06 22:30:27,747 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-06 22:30:27,747 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 159 flow [2023-11-06 22:30:27,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 366.5) internal successors, (1466), 4 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:27,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:27,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:27,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:30:27,749 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:30:27,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:27,750 INFO L85 PathProgramCache]: Analyzing trace with hash -728077484, now seen corresponding path program 1 times [2023-11-06 22:30:27,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:27,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997194174] [2023-11-06 22:30:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:27,892 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 22:30:27,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:27,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997194174] [2023-11-06 22:30:27,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997194174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:27,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903829698] [2023-11-06 22:30:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:27,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:27,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:27,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:27,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:30:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:28,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:30:28,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:28,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:28,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903829698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:28,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:30:28,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-11-06 22:30:28,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597039196] [2023-11-06 22:30:28,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:28,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:30:28,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:28,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:30:28,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:30:28,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 883 [2023-11-06 22:30:28,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 362.5) internal successors, (1450), 4 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:28,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:28,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 883 [2023-11-06 22:30:28,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:28,514 INFO L124 PetriNetUnfolderBase]: 146/248 cut-off events. [2023-11-06 22:30:28,514 INFO L125 PetriNetUnfolderBase]: For 423/423 co-relation queries the response was YES. [2023-11-06 22:30:28,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 248 events. 146/248 cut-off events. For 423/423 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 794 event pairs, 12 based on Foata normal form. 6/234 useless extension candidates. Maximal degree in co-relation 882. Up to 167 conditions per place. [2023-11-06 22:30:28,518 INFO L140 encePairwiseOnDemand]: 875/883 looper letters, 44 selfloop transitions, 7 changer transitions 8/59 dead transitions. [2023-11-06 22:30:28,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 59 transitions, 404 flow [2023-11-06 22:30:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:30:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:30:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1846 transitions. [2023-11-06 22:30:28,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41812004530011326 [2023-11-06 22:30:28,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1846 transitions. [2023-11-06 22:30:28,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1846 transitions. [2023-11-06 22:30:28,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:28,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1846 transitions. [2023-11-06 22:30:28,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 369.2) internal successors, (1846), 5 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:28,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 883.0) internal successors, (5298), 6 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:28,553 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 883.0) internal successors, (5298), 6 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:28,553 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 159 flow. Second operand 5 states and 1846 transitions. [2023-11-06 22:30:28,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 59 transitions, 404 flow [2023-11-06 22:30:28,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 59 transitions, 351 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-06 22:30:28,558 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 176 flow [2023-11-06 22:30:28,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-11-06 22:30:28,560 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-06 22:30:28,560 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 176 flow [2023-11-06 22:30:28,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 362.5) internal successors, (1450), 4 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:28,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:28,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:28,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:28,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:28,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:30:28,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:28,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1208274758, now seen corresponding path program 2 times [2023-11-06 22:30:28,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:28,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499010380] [2023-11-06 22:30:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:28,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:28,958 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 22:30:28,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:28,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499010380] [2023-11-06 22:30:28,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499010380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:28,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998738424] [2023-11-06 22:30:28,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:30:28,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:28,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:28,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:28,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:30:29,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:30:29,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:29,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:30:29,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:29,294 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:29,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998738424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:29,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:30:29,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-11-06 22:30:29,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861716768] [2023-11-06 22:30:29,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:29,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:30:29,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:30:29,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:30:29,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 883 [2023-11-06 22:30:29,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 363.5) internal successors, (1454), 4 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:29,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:29,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 883 [2023-11-06 22:30:29,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:29,520 INFO L124 PetriNetUnfolderBase]: 133/215 cut-off events. [2023-11-06 22:30:29,520 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-11-06 22:30:29,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 215 events. 133/215 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 627 event pairs, 8 based on Foata normal form. 10/199 useless extension candidates. Maximal degree in co-relation 764. Up to 137 conditions per place. [2023-11-06 22:30:29,523 INFO L140 encePairwiseOnDemand]: 875/883 looper letters, 35 selfloop transitions, 11 changer transitions 5/51 dead transitions. [2023-11-06 22:30:29,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 340 flow [2023-11-06 22:30:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:30:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:30:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1844 transitions. [2023-11-06 22:30:29,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176670441676104 [2023-11-06 22:30:29,534 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1844 transitions. [2023-11-06 22:30:29,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1844 transitions. [2023-11-06 22:30:29,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:29,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1844 transitions. [2023-11-06 22:30:29,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 368.8) internal successors, (1844), 5 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:29,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 883.0) internal successors, (5298), 6 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:29,559 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 883.0) internal successors, (5298), 6 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:29,559 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 176 flow. Second operand 5 states and 1844 transitions. [2023-11-06 22:30:29,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 340 flow [2023-11-06 22:30:29,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 326 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:30:29,564 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 207 flow [2023-11-06 22:30:29,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=207, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-11-06 22:30:29,569 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-11-06 22:30:29,572 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 207 flow [2023-11-06 22:30:29,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 363.5) internal successors, (1454), 4 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:29,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:29,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:29,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:29,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:29,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:30:29,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:29,782 INFO L85 PathProgramCache]: Analyzing trace with hash -726141954, now seen corresponding path program 1 times [2023-11-06 22:30:29,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:29,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35992204] [2023-11-06 22:30:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:29,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:29,917 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 22:30:29,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:29,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35992204] [2023-11-06 22:30:29,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35992204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:29,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679391601] [2023-11-06 22:30:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:29,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:29,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:29,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:29,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:30:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:30,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:30:30,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:30,112 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 22:30:30,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:30,147 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 22:30:30,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679391601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:30,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:30,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-06 22:30:30,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631647929] [2023-11-06 22:30:30,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:30,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:30:30,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:30,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:30:30,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:30:30,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 357 out of 883 [2023-11-06 22:30:30,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 207 flow. Second operand has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:30,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:30,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 357 of 883 [2023-11-06 22:30:30,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:30,607 INFO L124 PetriNetUnfolderBase]: 160/251 cut-off events. [2023-11-06 22:30:30,607 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2023-11-06 22:30:30,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1013 conditions, 251 events. 160/251 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 702 event pairs, 6 based on Foata normal form. 10/231 useless extension candidates. Maximal degree in co-relation 988. Up to 160 conditions per place. [2023-11-06 22:30:30,611 INFO L140 encePairwiseOnDemand]: 876/883 looper letters, 41 selfloop transitions, 9 changer transitions 0/50 dead transitions. [2023-11-06 22:30:30,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 376 flow [2023-11-06 22:30:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:30:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:30:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2179 transitions. [2023-11-06 22:30:30,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41128727821819555 [2023-11-06 22:30:30,624 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2179 transitions. [2023-11-06 22:30:30,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2179 transitions. [2023-11-06 22:30:30,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:30,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2179 transitions. [2023-11-06 22:30:30,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 363.1666666666667) internal successors, (2179), 6 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:30,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 883.0) internal successors, (6181), 7 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:30,653 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 883.0) internal successors, (6181), 7 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:30,653 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 207 flow. Second operand 6 states and 2179 transitions. [2023-11-06 22:30:30,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 376 flow [2023-11-06 22:30:30,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 348 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-06 22:30:30,658 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 222 flow [2023-11-06 22:30:30,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2023-11-06 22:30:30,659 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2023-11-06 22:30:30,659 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 222 flow [2023-11-06 22:30:30,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:30,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:30,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:30,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:30,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:30:30,868 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:30:30,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:30,869 INFO L85 PathProgramCache]: Analyzing trace with hash 195425462, now seen corresponding path program 1 times [2023-11-06 22:30:30,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:30,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20620641] [2023-11-06 22:30:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:30,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:31,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:31,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20620641] [2023-11-06 22:30:31,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20620641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:31,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945044655] [2023-11-06 22:30:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:31,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:31,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:31,983 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:32,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:30:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:32,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:30:32,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:32,262 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 22:30:32,317 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:30:32,446 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:30:32,690 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 89 treesize of output 61 [2023-11-06 22:30:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:32,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:33,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945044655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:33,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:33,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-11-06 22:30:33,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920981308] [2023-11-06 22:30:33,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:33,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:30:33,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:30:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=342, Unknown=4, NotChecked=0, Total=420 [2023-11-06 22:30:35,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 883 [2023-11-06 22:30:35,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 222 flow. Second operand has 21 states, 21 states have (on average 306.14285714285717) internal successors, (6429), 21 states have internal predecessors, (6429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:35,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:35,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 883 [2023-11-06 22:30:35,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:36,194 INFO L124 PetriNetUnfolderBase]: 211/335 cut-off events. [2023-11-06 22:30:36,195 INFO L125 PetriNetUnfolderBase]: For 447/447 co-relation queries the response was YES. [2023-11-06 22:30:36,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1372 conditions, 335 events. 211/335 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1068 event pairs, 10 based on Foata normal form. 1/300 useless extension candidates. Maximal degree in co-relation 1345. Up to 200 conditions per place. [2023-11-06 22:30:36,200 INFO L140 encePairwiseOnDemand]: 873/883 looper letters, 46 selfloop transitions, 29 changer transitions 4/79 dead transitions. [2023-11-06 22:30:36,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 79 transitions, 564 flow [2023-11-06 22:30:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:30:36,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:30:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3108 transitions. [2023-11-06 22:30:36,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35198187995469987 [2023-11-06 22:30:36,215 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3108 transitions. [2023-11-06 22:30:36,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3108 transitions. [2023-11-06 22:30:36,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:36,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3108 transitions. [2023-11-06 22:30:36,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 310.8) internal successors, (3108), 10 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,246 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,247 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 222 flow. Second operand 10 states and 3108 transitions. [2023-11-06 22:30:36,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 79 transitions, 564 flow [2023-11-06 22:30:36,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 79 transitions, 556 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:30:36,253 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 405 flow [2023-11-06 22:30:36,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=405, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2023-11-06 22:30:36,255 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-11-06 22:30:36,255 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 405 flow [2023-11-06 22:30:36,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 306.14285714285717) internal successors, (6429), 21 states have internal predecessors, (6429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:36,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:36,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:36,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:36,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:30:36,465 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:30:36,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:36,465 INFO L85 PathProgramCache]: Analyzing trace with hash 817209116, now seen corresponding path program 2 times [2023-11-06 22:30:36,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:36,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933958145] [2023-11-06 22:30:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:36,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:37,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:37,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933958145] [2023-11-06 22:30:37,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933958145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:37,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874345440] [2023-11-06 22:30:37,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:30:37,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:37,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:37,705 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:37,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:30:37,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:30:37,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:37,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:30:37,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:37,880 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 22:30:37,929 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 22:30:38,042 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 22:30:38,251 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 89 treesize of output 61 [2023-11-06 22:30:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:38,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:38,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874345440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:38,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:38,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-06 22:30:38,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331856294] [2023-11-06 22:30:38,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:38,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:30:38,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:38,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:30:38,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=328, Unknown=4, NotChecked=0, Total=420 [2023-11-06 22:30:40,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 883 [2023-11-06 22:30:40,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 405 flow. Second operand has 21 states, 21 states have (on average 306.0) internal successors, (6426), 21 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:40,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:40,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 883 [2023-11-06 22:30:40,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:41,042 INFO L124 PetriNetUnfolderBase]: 252/394 cut-off events. [2023-11-06 22:30:41,042 INFO L125 PetriNetUnfolderBase]: For 1038/1038 co-relation queries the response was YES. [2023-11-06 22:30:41,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1990 conditions, 394 events. 252/394 cut-off events. For 1038/1038 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1282 event pairs, 14 based on Foata normal form. 1/353 useless extension candidates. Maximal degree in co-relation 1958. Up to 260 conditions per place. [2023-11-06 22:30:41,048 INFO L140 encePairwiseOnDemand]: 873/883 looper letters, 50 selfloop transitions, 34 changer transitions 4/88 dead transitions. [2023-11-06 22:30:41,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 799 flow [2023-11-06 22:30:41,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:30:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:30:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3111 transitions. [2023-11-06 22:30:41,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.352321630804077 [2023-11-06 22:30:41,062 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3111 transitions. [2023-11-06 22:30:41,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3111 transitions. [2023-11-06 22:30:41,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:41,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3111 transitions. [2023-11-06 22:30:41,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 311.1) internal successors, (3111), 10 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:41,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:41,095 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:41,095 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 405 flow. Second operand 10 states and 3111 transitions. [2023-11-06 22:30:41,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 799 flow [2023-11-06 22:30:41,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 732 flow, removed 26 selfloop flow, removed 3 redundant places. [2023-11-06 22:30:41,104 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 564 flow [2023-11-06 22:30:41,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=564, PETRI_PLACES=58, PETRI_TRANSITIONS=62} [2023-11-06 22:30:41,105 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2023-11-06 22:30:41,105 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 564 flow [2023-11-06 22:30:41,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 306.0) internal successors, (6426), 21 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:41,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:41,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:41,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:41,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:30:41,314 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:30:41,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:41,315 INFO L85 PathProgramCache]: Analyzing trace with hash 512447186, now seen corresponding path program 3 times [2023-11-06 22:30:41,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:41,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518968097] [2023-11-06 22:30:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:41,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:42,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:42,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518968097] [2023-11-06 22:30:42,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518968097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:42,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514660204] [2023-11-06 22:30:42,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:30:42,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:42,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:42,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:42,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:30:42,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:30:42,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:42,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:30:42,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:42,210 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 22:30:42,270 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 22:30:42,379 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 22:30:42,525 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 89 treesize of output 61 [2023-11-06 22:30:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:42,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:43,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514660204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:43,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:43,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 19 [2023-11-06 22:30:43,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082134022] [2023-11-06 22:30:43,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:43,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:30:43,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:43,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:30:43,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=299, Unknown=4, NotChecked=0, Total=380 [2023-11-06 22:30:44,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 883 [2023-11-06 22:30:44,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 564 flow. Second operand has 20 states, 20 states have (on average 306.1) internal successors, (6122), 20 states have internal predecessors, (6122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:44,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:44,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 883 [2023-11-06 22:30:44,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:45,391 INFO L124 PetriNetUnfolderBase]: 257/403 cut-off events. [2023-11-06 22:30:45,391 INFO L125 PetriNetUnfolderBase]: For 1432/1432 co-relation queries the response was YES. [2023-11-06 22:30:45,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2141 conditions, 403 events. 257/403 cut-off events. For 1432/1432 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1332 event pairs, 12 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 2105. Up to 260 conditions per place. [2023-11-06 22:30:45,397 INFO L140 encePairwiseOnDemand]: 873/883 looper letters, 50 selfloop transitions, 36 changer transitions 4/90 dead transitions. [2023-11-06 22:30:45,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 873 flow [2023-11-06 22:30:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:30:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:30:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3110 transitions. [2023-11-06 22:30:45,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3522083805209513 [2023-11-06 22:30:45,409 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3110 transitions. [2023-11-06 22:30:45,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3110 transitions. [2023-11-06 22:30:45,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:45,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3110 transitions. [2023-11-06 22:30:45,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 311.0) internal successors, (3110), 10 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:45,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:45,439 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:45,439 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 564 flow. Second operand 10 states and 3110 transitions. [2023-11-06 22:30:45,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 873 flow [2023-11-06 22:30:45,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 799 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-11-06 22:30:45,448 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 597 flow [2023-11-06 22:30:45,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=597, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2023-11-06 22:30:45,449 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 42 predicate places. [2023-11-06 22:30:45,450 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 597 flow [2023-11-06 22:30:45,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 306.1) internal successors, (6122), 20 states have internal predecessors, (6122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:45,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:45,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:45,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:45,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:45,670 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:30:45,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:45,670 INFO L85 PathProgramCache]: Analyzing trace with hash 802342966, now seen corresponding path program 4 times [2023-11-06 22:30:45,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:45,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124574096] [2023-11-06 22:30:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:45,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:46,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:46,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124574096] [2023-11-06 22:30:46,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124574096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:46,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037114481] [2023-11-06 22:30:46,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:30:46,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:46,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:46,290 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:46,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:30:46,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:30:46,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:46,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:30:46,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:46,817 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 31 treesize of output 15 [2023-11-06 22:30:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:46,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:47,137 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:47,137 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 172 treesize of output 124 [2023-11-06 22:30:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:47,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037114481] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:47,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:47,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-06 22:30:47,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358520408] [2023-11-06 22:30:47,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:47,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:30:47,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:47,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:30:47,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:30:49,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 883 [2023-11-06 22:30:49,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 597 flow. Second operand has 21 states, 21 states have (on average 332.0952380952381) internal successors, (6974), 21 states have internal predecessors, (6974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:49,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:49,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 883 [2023-11-06 22:30:49,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:51,251 INFO L124 PetriNetUnfolderBase]: 667/1056 cut-off events. [2023-11-06 22:30:51,251 INFO L125 PetriNetUnfolderBase]: For 5276/5276 co-relation queries the response was YES. [2023-11-06 22:30:51,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5901 conditions, 1056 events. 667/1056 cut-off events. For 5276/5276 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4625 event pairs, 8 based on Foata normal form. 7/972 useless extension candidates. Maximal degree in co-relation 4785. Up to 327 conditions per place. [2023-11-06 22:30:51,268 INFO L140 encePairwiseOnDemand]: 871/883 looper letters, 104 selfloop transitions, 197 changer transitions 6/307 dead transitions. [2023-11-06 22:30:51,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 307 transitions, 3085 flow [2023-11-06 22:30:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:30:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 22:30:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12114 transitions. [2023-11-06 22:30:51,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3810872027180068 [2023-11-06 22:30:51,306 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12114 transitions. [2023-11-06 22:30:51,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12114 transitions. [2023-11-06 22:30:51,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:51,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12114 transitions. [2023-11-06 22:30:51,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 336.5) internal successors, (12114), 36 states have internal predecessors, (12114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:51,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 883.0) internal successors, (32671), 37 states have internal predecessors, (32671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:51,395 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 883.0) internal successors, (32671), 37 states have internal predecessors, (32671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:51,396 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 597 flow. Second operand 36 states and 12114 transitions. [2023-11-06 22:30:51,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 307 transitions, 3085 flow [2023-11-06 22:30:51,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 307 transitions, 2843 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-11-06 22:30:51,427 INFO L231 Difference]: Finished difference. Result has 97 places, 234 transitions, 2514 flow [2023-11-06 22:30:51,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2514, PETRI_PLACES=97, PETRI_TRANSITIONS=234} [2023-11-06 22:30:51,429 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 76 predicate places. [2023-11-06 22:30:51,429 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 234 transitions, 2514 flow [2023-11-06 22:30:51,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 332.0952380952381) internal successors, (6974), 21 states have internal predecessors, (6974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:51,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:51,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:51,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:51,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:30:51,639 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:30:51,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:51,640 INFO L85 PathProgramCache]: Analyzing trace with hash -361293494, now seen corresponding path program 5 times [2023-11-06 22:30:51,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:51,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867884903] [2023-11-06 22:30:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:51,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:52,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:52,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867884903] [2023-11-06 22:30:52,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867884903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:52,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616407354] [2023-11-06 22:30:52,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:30:52,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:52,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:52,660 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:52,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:30:52,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:30:52,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:52,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 22:30:52,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:52,852 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 22:30:52,926 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 22:30:53,051 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 22:30:53,252 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 22:30:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:53,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:53,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616407354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:53,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:53,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2023-11-06 22:30:53,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113041030] [2023-11-06 22:30:53,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:53,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:30:53,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:53,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:30:53,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=375, Unknown=1, NotChecked=0, Total=462 [2023-11-06 22:30:55,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 883 [2023-11-06 22:30:55,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 234 transitions, 2514 flow. Second operand has 22 states, 22 states have (on average 298.90909090909093) internal successors, (6576), 22 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:55,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:55,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 883 [2023-11-06 22:30:55,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:56,300 INFO L124 PetriNetUnfolderBase]: 676/1083 cut-off events. [2023-11-06 22:30:56,300 INFO L125 PetriNetUnfolderBase]: For 5537/5537 co-relation queries the response was YES. [2023-11-06 22:30:56,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6697 conditions, 1083 events. 676/1083 cut-off events. For 5537/5537 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4841 event pairs, 16 based on Foata normal form. 1/993 useless extension candidates. Maximal degree in co-relation 5712. Up to 598 conditions per place. [2023-11-06 22:30:56,319 INFO L140 encePairwiseOnDemand]: 874/883 looper letters, 147 selfloop transitions, 127 changer transitions 6/280 dead transitions. [2023-11-06 22:30:56,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 280 transitions, 3399 flow [2023-11-06 22:30:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:30:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:30:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4551 transitions. [2023-11-06 22:30:56,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3436013590033975 [2023-11-06 22:30:56,330 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4551 transitions. [2023-11-06 22:30:56,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4551 transitions. [2023-11-06 22:30:56,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:56,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4551 transitions. [2023-11-06 22:30:56,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 303.4) internal successors, (4551), 15 states have internal predecessors, (4551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 883.0) internal successors, (14128), 16 states have internal predecessors, (14128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,357 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 883.0) internal successors, (14128), 16 states have internal predecessors, (14128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,357 INFO L175 Difference]: Start difference. First operand has 97 places, 234 transitions, 2514 flow. Second operand 15 states and 4551 transitions. [2023-11-06 22:30:56,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 280 transitions, 3399 flow [2023-11-06 22:30:56,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 280 transitions, 2476 flow, removed 389 selfloop flow, removed 10 redundant places. [2023-11-06 22:30:56,484 INFO L231 Difference]: Finished difference. Result has 105 places, 240 transitions, 2096 flow [2023-11-06 22:30:56,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2096, PETRI_PLACES=105, PETRI_TRANSITIONS=240} [2023-11-06 22:30:56,485 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 84 predicate places. [2023-11-06 22:30:56,485 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 240 transitions, 2096 flow [2023-11-06 22:30:56,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 298.90909090909093) internal successors, (6576), 22 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:56,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:56,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 22:30:56,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:56,692 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:30:56,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:56,693 INFO L85 PathProgramCache]: Analyzing trace with hash -56531564, now seen corresponding path program 6 times [2023-11-06 22:30:56,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:56,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857369133] [2023-11-06 22:30:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:56,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:57,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:57,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857369133] [2023-11-06 22:30:57,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857369133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:57,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744352829] [2023-11-06 22:30:57,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:30:57,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:57,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:57,252 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:57,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:30:57,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:30:57,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:57,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:30:57,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:57,428 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 22:30:57,487 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 22:30:57,604 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 22:30:57,789 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 22:30:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:57,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:58,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744352829] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:58,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:58,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 19 [2023-11-06 22:30:58,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725898598] [2023-11-06 22:30:58,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:58,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:30:58,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:30:58,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=300, Unknown=1, NotChecked=0, Total=380 [2023-11-06 22:31:00,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 883 [2023-11-06 22:31:00,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 240 transitions, 2096 flow. Second operand has 20 states, 20 states have (on average 299.1) internal successors, (5982), 20 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:00,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:00,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 883 [2023-11-06 22:31:00,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:01,031 INFO L124 PetriNetUnfolderBase]: 677/1094 cut-off events. [2023-11-06 22:31:01,032 INFO L125 PetriNetUnfolderBase]: For 2446/2446 co-relation queries the response was YES. [2023-11-06 22:31:01,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5469 conditions, 1094 events. 677/1094 cut-off events. For 2446/2446 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4984 event pairs, 22 based on Foata normal form. 1/992 useless extension candidates. Maximal degree in co-relation 5429. Up to 679 conditions per place. [2023-11-06 22:31:01,048 INFO L140 encePairwiseOnDemand]: 874/883 looper letters, 157 selfloop transitions, 112 changer transitions 4/273 dead transitions. [2023-11-06 22:31:01,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 273 transitions, 2802 flow [2023-11-06 22:31:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:31:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:31:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3950 transitions. [2023-11-06 22:31:01,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.344106629497343 [2023-11-06 22:31:01,055 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3950 transitions. [2023-11-06 22:31:01,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3950 transitions. [2023-11-06 22:31:01,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:01,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3950 transitions. [2023-11-06 22:31:01,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 303.84615384615387) internal successors, (3950), 13 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:01,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 883.0) internal successors, (12362), 14 states have internal predecessors, (12362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:01,075 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 883.0) internal successors, (12362), 14 states have internal predecessors, (12362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:01,076 INFO L175 Difference]: Start difference. First operand has 105 places, 240 transitions, 2096 flow. Second operand 13 states and 3950 transitions. [2023-11-06 22:31:01,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 273 transitions, 2802 flow [2023-11-06 22:31:01,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 273 transitions, 2730 flow, removed 13 selfloop flow, removed 9 redundant places. [2023-11-06 22:31:01,112 INFO L231 Difference]: Finished difference. Result has 108 places, 244 transitions, 2324 flow [2023-11-06 22:31:01,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2324, PETRI_PLACES=108, PETRI_TRANSITIONS=244} [2023-11-06 22:31:01,114 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 87 predicate places. [2023-11-06 22:31:01,115 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 244 transitions, 2324 flow [2023-11-06 22:31:01,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 299.1) internal successors, (5982), 20 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:01,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:01,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:01,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:01,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:01,322 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:31:01,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:01,322 INFO L85 PathProgramCache]: Analyzing trace with hash -578849886, now seen corresponding path program 7 times [2023-11-06 22:31:01,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:01,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563561162] [2023-11-06 22:31:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:01,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:02,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:02,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563561162] [2023-11-06 22:31:02,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563561162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:02,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842535573] [2023-11-06 22:31:02,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:31:02,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:02,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:02,081 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:02,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:31:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:02,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:31:02,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:02,243 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 22:31:02,288 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 22:31:02,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:31:02,451 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 22:31:02,567 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 89 treesize of output 61 [2023-11-06 22:31:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:02,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:02,882 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_292 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_292) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (< 2147483647 (+ c_~bag2~0 .cse0)) (< (+ c_~bag2~0 .cse0 2147483648) 0) (= (+ c_~bag1~0 c_~sum1~0) (+ c_~bag2~0 .cse0 c_~sum2~0))))) is different from false [2023-11-06 22:31:03,008 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_292 (Array Int Int)) (v_ArrVal_291 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_291))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_292) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< (+ .cse0 2147483648) 0) (= .cse0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (< 2147483647 .cse0))))) is different from false [2023-11-06 22:31:03,019 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:03,019 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 97 treesize of output 61 [2023-11-06 22:31:03,025 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 228 treesize of output 204 [2023-11-06 22:31:03,034 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 134 treesize of output 122 [2023-11-06 22:31:03,042 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 63 treesize of output 57 [2023-11-06 22:31:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-06 22:31:03,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842535573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:03,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:03,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-06 22:31:03,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425840673] [2023-11-06 22:31:03,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:03,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:31:03,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:03,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:31:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=381, Unknown=6, NotChecked=82, Total=552 [2023-11-06 22:31:03,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 883 [2023-11-06 22:31:03,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 244 transitions, 2324 flow. Second operand has 24 states, 24 states have (on average 305.7916666666667) internal successors, (7339), 24 states have internal predecessors, (7339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:03,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:03,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 883 [2023-11-06 22:31:03,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:03,984 INFO L124 PetriNetUnfolderBase]: 685/1111 cut-off events. [2023-11-06 22:31:03,984 INFO L125 PetriNetUnfolderBase]: For 3091/3091 co-relation queries the response was YES. [2023-11-06 22:31:03,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5897 conditions, 1111 events. 685/1111 cut-off events. For 3091/3091 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5118 event pairs, 27 based on Foata normal form. 1/1009 useless extension candidates. Maximal degree in co-relation 5729. Up to 823 conditions per place. [2023-11-06 22:31:04,003 INFO L140 encePairwiseOnDemand]: 873/883 looper letters, 188 selfloop transitions, 84 changer transitions 4/276 dead transitions. [2023-11-06 22:31:04,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 276 transitions, 3033 flow [2023-11-06 22:31:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:31:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:31:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3108 transitions. [2023-11-06 22:31:04,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35198187995469987 [2023-11-06 22:31:04,009 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3108 transitions. [2023-11-06 22:31:04,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3108 transitions. [2023-11-06 22:31:04,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:04,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3108 transitions. [2023-11-06 22:31:04,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 310.8) internal successors, (3108), 10 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:04,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:04,027 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:04,027 INFO L175 Difference]: Start difference. First operand has 108 places, 244 transitions, 2324 flow. Second operand 10 states and 3108 transitions. [2023-11-06 22:31:04,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 276 transitions, 3033 flow [2023-11-06 22:31:04,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 276 transitions, 2763 flow, removed 9 selfloop flow, removed 12 redundant places. [2023-11-06 22:31:04,073 INFO L231 Difference]: Finished difference. Result has 108 places, 246 transitions, 2320 flow [2023-11-06 22:31:04,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2320, PETRI_PLACES=108, PETRI_TRANSITIONS=246} [2023-11-06 22:31:04,074 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 87 predicate places. [2023-11-06 22:31:04,075 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 246 transitions, 2320 flow [2023-11-06 22:31:04,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 305.7916666666667) internal successors, (7339), 24 states have internal predecessors, (7339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:04,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:04,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:04,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:04,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:04,283 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:31:04,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:04,283 INFO L85 PathProgramCache]: Analyzing trace with hash 927812712, now seen corresponding path program 8 times [2023-11-06 22:31:04,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:04,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539025206] [2023-11-06 22:31:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:04,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:05,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:05,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539025206] [2023-11-06 22:31:05,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539025206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:05,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046488539] [2023-11-06 22:31:05,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:31:05,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:05,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:05,085 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:05,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:31:05,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:31:05,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:05,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:31:05,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:05,244 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 22:31:05,284 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 22:31:05,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:31:05,418 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 22:31:05,483 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 89 treesize of output 61 [2023-11-06 22:31:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:05,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:05,756 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_319 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_319) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (< (+ c_~bag2~0 .cse0 2147483648) 0) (= (+ c_~bag2~0 .cse0 c_~sum2~0) (+ c_~bag1~0 c_~sum1~0)) (< 2147483647 (+ c_~bag2~0 .cse0))))) is different from false [2023-11-06 22:31:05,895 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_319 (Array Int Int)) (v_ArrVal_318 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_318))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_319) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< 2147483647 .cse0) (< (+ .cse0 2147483648) 0) (= .cse0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) is different from false [2023-11-06 22:31:05,906 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:05,907 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 97 treesize of output 61 [2023-11-06 22:31:05,912 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 488 treesize of output 440 [2023-11-06 22:31:05,925 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2023-11-06 22:31:05,932 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 82 treesize of output 70 [2023-11-06 22:31:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-06 22:31:05,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046488539] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:05,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:05,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-06 22:31:05,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892487616] [2023-11-06 22:31:05,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:05,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:31:05,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:05,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:31:05,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=348, Unknown=5, NotChecked=78, Total=506 [2023-11-06 22:31:05,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 883 [2023-11-06 22:31:05,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 246 transitions, 2320 flow. Second operand has 23 states, 23 states have (on average 305.7826086956522) internal successors, (7033), 23 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:06,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:06,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 883 [2023-11-06 22:31:06,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:06,706 INFO L124 PetriNetUnfolderBase]: 730/1182 cut-off events. [2023-11-06 22:31:06,706 INFO L125 PetriNetUnfolderBase]: For 3376/3376 co-relation queries the response was YES. [2023-11-06 22:31:06,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6409 conditions, 1182 events. 730/1182 cut-off events. For 3376/3376 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 5515 event pairs, 30 based on Foata normal form. 1/1074 useless extension candidates. Maximal degree in co-relation 6252. Up to 888 conditions per place. [2023-11-06 22:31:06,726 INFO L140 encePairwiseOnDemand]: 874/883 looper letters, 184 selfloop transitions, 102 changer transitions 4/290 dead transitions. [2023-11-06 22:31:06,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 290 transitions, 3282 flow [2023-11-06 22:31:06,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:31:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:31:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3111 transitions. [2023-11-06 22:31:06,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.352321630804077 [2023-11-06 22:31:06,734 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3111 transitions. [2023-11-06 22:31:06,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3111 transitions. [2023-11-06 22:31:06,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:06,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3111 transitions. [2023-11-06 22:31:06,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 311.1) internal successors, (3111), 10 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:06,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:06,751 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:06,751 INFO L175 Difference]: Start difference. First operand has 108 places, 246 transitions, 2320 flow. Second operand 10 states and 3111 transitions. [2023-11-06 22:31:06,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 290 transitions, 3282 flow [2023-11-06 22:31:06,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 290 transitions, 3020 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-11-06 22:31:06,796 INFO L231 Difference]: Finished difference. Result has 112 places, 266 transitions, 2657 flow [2023-11-06 22:31:06,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2657, PETRI_PLACES=112, PETRI_TRANSITIONS=266} [2023-11-06 22:31:06,798 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 91 predicate places. [2023-11-06 22:31:06,798 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 266 transitions, 2657 flow [2023-11-06 22:31:06,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 305.7826086956522) internal successors, (7033), 23 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:06,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:06,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:06,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:07,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:07,007 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:31:07,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1782190410, now seen corresponding path program 9 times [2023-11-06 22:31:07,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:07,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037558328] [2023-11-06 22:31:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:07,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:07,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:07,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037558328] [2023-11-06 22:31:07,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037558328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:07,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119470358] [2023-11-06 22:31:07,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:31:07,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:07,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:07,578 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:07,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:31:07,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:31:07,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:07,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:31:07,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:07,755 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 22:31:07,814 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 22:31:07,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:31:07,996 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 22:31:08,105 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 89 treesize of output 61 [2023-11-06 22:31:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:08,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:08,370 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_347 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_347) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (= (+ c_~bag2~0 .cse0 c_~sum2~0) c_~sum1~0) (< (+ c_~bag2~0 .cse0 2147483648) 0) (< 2147483647 (+ c_~bag2~0 .cse0))))) is different from false [2023-11-06 22:31:08,449 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_347 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_347) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (= (+ c_~bag2~0 .cse0 c_~sum2~0) (+ c_~bag1~0 c_~sum1~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_~i~0 4))))) (< (+ c_~bag2~0 .cse0 2147483648) 0) (< 2147483647 (+ c_~bag2~0 .cse0))))) is different from false [2023-11-06 22:31:08,497 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_347 (Array Int Int)) (v_ArrVal_346 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_346))) (let ((.cse1 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_347) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) .cse1) (< 2147483647 .cse1) (< (+ .cse1 2147483648) 0))))) is different from false [2023-11-06 22:31:08,507 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:08,507 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 97 treesize of output 61 [2023-11-06 22:31:08,512 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 228 treesize of output 204 [2023-11-06 22:31:08,520 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 122 [2023-11-06 22:31:08,527 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 63 treesize of output 57 [2023-11-06 22:31:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-06 22:31:08,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119470358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:08,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:08,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2023-11-06 22:31:08,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194973345] [2023-11-06 22:31:08,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:08,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:31:08,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:08,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:31:08,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=312, Unknown=8, NotChecked=114, Total=506 [2023-11-06 22:31:08,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 883 [2023-11-06 22:31:08,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 266 transitions, 2657 flow. Second operand has 23 states, 23 states have (on average 305.8695652173913) internal successors, (7035), 23 states have internal predecessors, (7035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:08,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:08,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 883 [2023-11-06 22:31:08,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:09,378 INFO L124 PetriNetUnfolderBase]: 738/1199 cut-off events. [2023-11-06 22:31:09,379 INFO L125 PetriNetUnfolderBase]: For 3805/3805 co-relation queries the response was YES. [2023-11-06 22:31:09,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6500 conditions, 1199 events. 738/1199 cut-off events. For 3805/3805 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 5664 event pairs, 29 based on Foata normal form. 1/1091 useless extension candidates. Maximal degree in co-relation 6332. Up to 881 conditions per place. [2023-11-06 22:31:09,397 INFO L140 encePairwiseOnDemand]: 874/883 looper letters, 196 selfloop transitions, 97 changer transitions 4/297 dead transitions. [2023-11-06 22:31:09,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 297 transitions, 3404 flow [2023-11-06 22:31:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:31:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:31:09,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3108 transitions. [2023-11-06 22:31:09,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35198187995469987 [2023-11-06 22:31:09,406 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3108 transitions. [2023-11-06 22:31:09,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3108 transitions. [2023-11-06 22:31:09,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:09,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3108 transitions. [2023-11-06 22:31:09,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 310.8) internal successors, (3108), 10 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:09,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:09,426 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:09,427 INFO L175 Difference]: Start difference. First operand has 112 places, 266 transitions, 2657 flow. Second operand 10 states and 3108 transitions. [2023-11-06 22:31:09,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 297 transitions, 3404 flow [2023-11-06 22:31:09,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 297 transitions, 3290 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-11-06 22:31:09,474 INFO L231 Difference]: Finished difference. Result has 118 places, 268 transitions, 2851 flow [2023-11-06 22:31:09,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2851, PETRI_PLACES=118, PETRI_TRANSITIONS=268} [2023-11-06 22:31:09,475 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 97 predicate places. [2023-11-06 22:31:09,475 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 268 transitions, 2851 flow [2023-11-06 22:31:09,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 305.8695652173913) internal successors, (7035), 23 states have internal predecessors, (7035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:09,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:09,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:09,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:09,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:31:09,683 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:31:09,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:09,683 INFO L85 PathProgramCache]: Analyzing trace with hash 623050782, now seen corresponding path program 10 times [2023-11-06 22:31:09,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:09,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772582732] [2023-11-06 22:31:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:09,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:10,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:10,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772582732] [2023-11-06 22:31:10,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772582732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:10,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262292954] [2023-11-06 22:31:10,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:31:10,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:10,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:10,337 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:10,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:31:10,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:31:10,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:10,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 22:31:10,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:10,497 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 42 treesize of output 38 [2023-11-06 22:31:10,779 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 22:31:10,872 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 83 treesize of output 55 [2023-11-06 22:31:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:11,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:11,509 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:11,509 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 126 treesize of output 94 [2023-11-06 22:31:11,517 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 51 treesize of output 33 [2023-11-06 22:31:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262292954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:11,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:11,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 23 [2023-11-06 22:31:11,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150382264] [2023-11-06 22:31:11,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:11,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:31:11,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:11,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:31:11,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=486, Unknown=1, NotChecked=0, Total=600 [2023-11-06 22:31:13,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 883 [2023-11-06 22:31:13,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 268 transitions, 2851 flow. Second operand has 25 states, 25 states have (on average 301.76) internal successors, (7544), 25 states have internal predecessors, (7544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:13,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:13,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 883 [2023-11-06 22:31:13,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:16,006 INFO L124 PetriNetUnfolderBase]: 1131/1780 cut-off events. [2023-11-06 22:31:16,006 INFO L125 PetriNetUnfolderBase]: For 8133/8133 co-relation queries the response was YES. [2023-11-06 22:31:16,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10390 conditions, 1780 events. 1131/1780 cut-off events. For 8133/8133 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 8819 event pairs, 12 based on Foata normal form. 29/1633 useless extension candidates. Maximal degree in co-relation 9914. Up to 530 conditions per place. [2023-11-06 22:31:16,034 INFO L140 encePairwiseOnDemand]: 871/883 looper letters, 136 selfloop transitions, 391 changer transitions 11/538 dead transitions. [2023-11-06 22:31:16,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 538 transitions, 6127 flow [2023-11-06 22:31:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:31:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-06 22:31:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 13497 transitions. [2023-11-06 22:31:16,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34739524348810874 [2023-11-06 22:31:16,058 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 13497 transitions. [2023-11-06 22:31:16,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 13497 transitions. [2023-11-06 22:31:16,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:16,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 13497 transitions. [2023-11-06 22:31:16,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 306.75) internal successors, (13497), 44 states have internal predecessors, (13497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:16,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 883.0) internal successors, (39735), 45 states have internal predecessors, (39735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:16,126 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 883.0) internal successors, (39735), 45 states have internal predecessors, (39735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:16,126 INFO L175 Difference]: Start difference. First operand has 118 places, 268 transitions, 2851 flow. Second operand 44 states and 13497 transitions. [2023-11-06 22:31:16,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 538 transitions, 6127 flow [2023-11-06 22:31:16,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 538 transitions, 5706 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-11-06 22:31:16,292 INFO L231 Difference]: Finished difference. Result has 163 places, 438 transitions, 5444 flow [2023-11-06 22:31:16,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5444, PETRI_PLACES=163, PETRI_TRANSITIONS=438} [2023-11-06 22:31:16,293 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-11-06 22:31:16,293 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 438 transitions, 5444 flow [2023-11-06 22:31:16,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 301.76) internal successors, (7544), 25 states have internal predecessors, (7544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:16,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:16,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:16,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:16,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:16,495 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:31:16,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:16,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1701386632, now seen corresponding path program 1 times [2023-11-06 22:31:16,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:16,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668275464] [2023-11-06 22:31:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:16,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:17,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:17,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668275464] [2023-11-06 22:31:17,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668275464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:17,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111869998] [2023-11-06 22:31:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:17,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:17,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:17,345 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:17,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:31:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:17,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:31:17,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:17,513 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 22:31:17,569 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 22:31:17,695 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 22:31:17,888 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 89 treesize of output 61 [2023-11-06 22:31:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:17,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:18,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111869998] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:18,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:18,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 23 [2023-11-06 22:31:18,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504582995] [2023-11-06 22:31:18,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:18,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:31:18,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:18,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:31:18,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=459, Unknown=10, NotChecked=0, Total=552 [2023-11-06 22:31:19,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 883 [2023-11-06 22:31:19,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 438 transitions, 5444 flow. Second operand has 24 states, 24 states have (on average 277.875) internal successors, (6669), 24 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:19,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:19,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 883 [2023-11-06 22:31:19,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:20,529 INFO L124 PetriNetUnfolderBase]: 1258/1976 cut-off events. [2023-11-06 22:31:20,529 INFO L125 PetriNetUnfolderBase]: For 10721/10721 co-relation queries the response was YES. [2023-11-06 22:31:20,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12771 conditions, 1976 events. 1258/1976 cut-off events. For 10721/10721 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 9962 event pairs, 38 based on Foata normal form. 1/1799 useless extension candidates. Maximal degree in co-relation 12493. Up to 1264 conditions per place. [2023-11-06 22:31:20,550 INFO L140 encePairwiseOnDemand]: 872/883 looper letters, 317 selfloop transitions, 203 changer transitions 4/524 dead transitions. [2023-11-06 22:31:20,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 524 transitions, 7402 flow [2023-11-06 22:31:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:31:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:31:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3108 transitions. [2023-11-06 22:31:20,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31998352723154533 [2023-11-06 22:31:20,555 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3108 transitions. [2023-11-06 22:31:20,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3108 transitions. [2023-11-06 22:31:20,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:20,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3108 transitions. [2023-11-06 22:31:20,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 282.54545454545456) internal successors, (3108), 11 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:20,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 883.0) internal successors, (10596), 12 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:20,571 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 883.0) internal successors, (10596), 12 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:20,571 INFO L175 Difference]: Start difference. First operand has 163 places, 438 transitions, 5444 flow. Second operand 11 states and 3108 transitions. [2023-11-06 22:31:20,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 524 transitions, 7402 flow [2023-11-06 22:31:20,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 524 transitions, 6735 flow, removed 254 selfloop flow, removed 10 redundant places. [2023-11-06 22:31:20,790 INFO L231 Difference]: Finished difference. Result has 167 places, 478 transitions, 6084 flow [2023-11-06 22:31:20,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=4907, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6084, PETRI_PLACES=167, PETRI_TRANSITIONS=478} [2023-11-06 22:31:20,791 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2023-11-06 22:31:20,791 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 478 transitions, 6084 flow [2023-11-06 22:31:20,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 277.875) internal successors, (6669), 24 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:20,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:20,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:20,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:20,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:31:20,994 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:31:20,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:20,994 INFO L85 PathProgramCache]: Analyzing trace with hash 354182234, now seen corresponding path program 2 times [2023-11-06 22:31:20,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:20,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010828811] [2023-11-06 22:31:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:20,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:21,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:21,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010828811] [2023-11-06 22:31:21,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010828811] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:21,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277523488] [2023-11-06 22:31:21,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:31:21,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:21,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:21,670 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:21,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:31:21,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:31:21,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:21,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:31:21,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:21,860 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 22:31:21,905 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 22:31:21,976 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 22:31:22,168 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 89 treesize of output 61 [2023-11-06 22:31:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:22,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:22,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277523488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:22,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:22,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 21 [2023-11-06 22:31:22,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828147908] [2023-11-06 22:31:22,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:22,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:31:22,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:31:22,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=377, Unknown=4, NotChecked=0, Total=462 [2023-11-06 22:31:24,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 883 [2023-11-06 22:31:24,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 478 transitions, 6084 flow. Second operand has 22 states, 22 states have (on average 277.90909090909093) internal successors, (6114), 22 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:24,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:24,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 883 [2023-11-06 22:31:24,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:25,452 INFO L124 PetriNetUnfolderBase]: 1290/2022 cut-off events. [2023-11-06 22:31:25,453 INFO L125 PetriNetUnfolderBase]: For 11479/11479 co-relation queries the response was YES. [2023-11-06 22:31:25,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13431 conditions, 2022 events. 1290/2022 cut-off events. For 11479/11479 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 10184 event pairs, 42 based on Foata normal form. 1/1851 useless extension candidates. Maximal degree in co-relation 13319. Up to 1341 conditions per place. [2023-11-06 22:31:25,472 INFO L140 encePairwiseOnDemand]: 872/883 looper letters, 323 selfloop transitions, 212 changer transitions 4/539 dead transitions. [2023-11-06 22:31:25,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 539 transitions, 7696 flow [2023-11-06 22:31:25,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:31:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:31:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3110 transitions. [2023-11-06 22:31:25,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32018943683722845 [2023-11-06 22:31:25,478 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3110 transitions. [2023-11-06 22:31:25,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3110 transitions. [2023-11-06 22:31:25,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:25,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3110 transitions. [2023-11-06 22:31:25,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 282.72727272727275) internal successors, (3110), 11 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:25,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 883.0) internal successors, (10596), 12 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:25,492 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 883.0) internal successors, (10596), 12 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:25,492 INFO L175 Difference]: Start difference. First operand has 167 places, 478 transitions, 6084 flow. Second operand 11 states and 3110 transitions. [2023-11-06 22:31:25,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 539 transitions, 7696 flow [2023-11-06 22:31:25,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 539 transitions, 7456 flow, removed 56 selfloop flow, removed 3 redundant places. [2023-11-06 22:31:25,688 INFO L231 Difference]: Finished difference. Result has 177 places, 490 transitions, 6636 flow [2023-11-06 22:31:25,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=5885, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6636, PETRI_PLACES=177, PETRI_TRANSITIONS=490} [2023-11-06 22:31:25,689 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2023-11-06 22:31:25,689 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 490 transitions, 6636 flow [2023-11-06 22:31:25,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 277.90909090909093) internal successors, (6114), 22 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:25,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:25,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:25,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:25,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:31:25,891 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:31:25,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:25,891 INFO L85 PathProgramCache]: Analyzing trace with hash 658944164, now seen corresponding path program 3 times [2023-11-06 22:31:25,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:25,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399238860] [2023-11-06 22:31:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:25,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:26,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:26,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399238860] [2023-11-06 22:31:26,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399238860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:26,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492335103] [2023-11-06 22:31:26,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:31:26,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:26,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:26,461 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:26,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:31:26,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:31:26,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:26,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-06 22:31:26,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:26,647 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 22:31:26,695 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 22:31:26,779 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 22:31:26,969 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 83 treesize of output 55 [2023-11-06 22:31:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:27,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:27,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492335103] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:27,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:27,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 23 [2023-11-06 22:31:27,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856484004] [2023-11-06 22:31:27,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:27,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:31:27,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:27,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:31:27,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=451, Unknown=3, NotChecked=0, Total=552 [2023-11-06 22:31:29,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 883 [2023-11-06 22:31:29,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 490 transitions, 6636 flow. Second operand has 24 states, 24 states have (on average 270.8333333333333) internal successors, (6500), 24 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:29,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:29,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 883 [2023-11-06 22:31:29,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:31,837 INFO L124 PetriNetUnfolderBase]: 1530/2382 cut-off events. [2023-11-06 22:31:31,837 INFO L125 PetriNetUnfolderBase]: For 15250/15250 co-relation queries the response was YES. [2023-11-06 22:31:31,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16722 conditions, 2382 events. 1530/2382 cut-off events. For 15250/15250 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 12300 event pairs, 21 based on Foata normal form. 1/2187 useless extension candidates. Maximal degree in co-relation 16595. Up to 769 conditions per place. [2023-11-06 22:31:31,864 INFO L140 encePairwiseOnDemand]: 871/883 looper letters, 123 selfloop transitions, 574 changer transitions 7/704 dead transitions. [2023-11-06 22:31:31,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 704 transitions, 10300 flow [2023-11-06 22:31:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:31:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:31:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 7965 transitions. [2023-11-06 22:31:31,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3110477603780216 [2023-11-06 22:31:31,876 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 7965 transitions. [2023-11-06 22:31:31,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 7965 transitions. [2023-11-06 22:31:31,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:31,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 7965 transitions. [2023-11-06 22:31:31,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 274.6551724137931) internal successors, (7965), 29 states have internal predecessors, (7965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:31,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 883.0) internal successors, (26490), 30 states have internal predecessors, (26490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:31,913 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 883.0) internal successors, (26490), 30 states have internal predecessors, (26490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:31,913 INFO L175 Difference]: Start difference. First operand has 177 places, 490 transitions, 6636 flow. Second operand 29 states and 7965 transitions. [2023-11-06 22:31:31,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 704 transitions, 10300 flow [2023-11-06 22:31:32,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 704 transitions, 9579 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-11-06 22:31:32,171 INFO L231 Difference]: Finished difference. Result has 202 places, 656 transitions, 9527 flow [2023-11-06 22:31:32,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=6073, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9527, PETRI_PLACES=202, PETRI_TRANSITIONS=656} [2023-11-06 22:31:32,172 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 181 predicate places. [2023-11-06 22:31:32,172 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 656 transitions, 9527 flow [2023-11-06 22:31:32,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 270.8333333333333) internal successors, (6500), 24 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:32,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:32,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:32,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:32,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:32,374 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:31:32,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:32,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1108160514, now seen corresponding path program 4 times [2023-11-06 22:31:32,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:32,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909126271] [2023-11-06 22:31:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:32,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:32,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:32,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909126271] [2023-11-06 22:31:32,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909126271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:32,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998830685] [2023-11-06 22:31:32,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:31:32,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:32,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:32,991 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:33,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:31:33,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:31:33,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:33,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:31:33,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:33,508 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 31 treesize of output 15 [2023-11-06 22:31:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:33,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:33,772 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:33,773 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 172 treesize of output 124 [2023-11-06 22:31:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:34,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998830685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:34,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:34,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-11-06 22:31:34,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272578259] [2023-11-06 22:31:34,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:34,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:31:34,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:31:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:31:36,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 883 [2023-11-06 22:31:36,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 656 transitions, 9527 flow. Second operand has 22 states, 22 states have (on average 320.0) internal successors, (7040), 22 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:36,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:36,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 883 [2023-11-06 22:31:36,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:38,820 INFO L124 PetriNetUnfolderBase]: 1660/2590 cut-off events. [2023-11-06 22:31:38,820 INFO L125 PetriNetUnfolderBase]: For 15074/15074 co-relation queries the response was YES. [2023-11-06 22:31:38,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19390 conditions, 2590 events. 1660/2590 cut-off events. For 15074/15074 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 13658 event pairs, 5 based on Foata normal form. 1/2389 useless extension candidates. Maximal degree in co-relation 19260. Up to 998 conditions per place. [2023-11-06 22:31:38,858 INFO L140 encePairwiseOnDemand]: 871/883 looper letters, 192 selfloop transitions, 637 changer transitions 6/835 dead transitions. [2023-11-06 22:31:38,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 835 transitions, 13207 flow [2023-11-06 22:31:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:31:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 22:31:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 11657 transitions. [2023-11-06 22:31:38,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667107084434378 [2023-11-06 22:31:38,884 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 11657 transitions. [2023-11-06 22:31:38,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 11657 transitions. [2023-11-06 22:31:38,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:38,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 11657 transitions. [2023-11-06 22:31:38,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 323.80555555555554) internal successors, (11657), 36 states have internal predecessors, (11657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:38,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 883.0) internal successors, (32671), 37 states have internal predecessors, (32671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:38,943 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 883.0) internal successors, (32671), 37 states have internal predecessors, (32671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:38,944 INFO L175 Difference]: Start difference. First operand has 202 places, 656 transitions, 9527 flow. Second operand 36 states and 11657 transitions. [2023-11-06 22:31:38,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 835 transitions, 13207 flow [2023-11-06 22:31:39,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 835 transitions, 12314 flow, removed 199 selfloop flow, removed 11 redundant places. [2023-11-06 22:31:39,257 INFO L231 Difference]: Finished difference. Result has 236 places, 760 transitions, 12463 flow [2023-11-06 22:31:39,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=8792, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=533, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=12463, PETRI_PLACES=236, PETRI_TRANSITIONS=760} [2023-11-06 22:31:39,259 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 215 predicate places. [2023-11-06 22:31:39,259 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 760 transitions, 12463 flow [2023-11-06 22:31:39,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 320.0) internal successors, (7040), 22 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:39,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:39,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:39,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:39,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:39,467 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:31:39,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:39,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1411733152, now seen corresponding path program 5 times [2023-11-06 22:31:39,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:39,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757073707] [2023-11-06 22:31:39,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:39,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:40,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:40,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757073707] [2023-11-06 22:31:40,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757073707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:40,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226906242] [2023-11-06 22:31:40,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:31:40,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:40,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:40,093 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:40,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:31:40,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:31:40,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:40,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 22:31:40,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:40,290 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 22:31:40,336 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 22:31:40,399 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 22:31:40,582 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 22:31:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:40,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:41,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226906242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:41,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:41,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 23 [2023-11-06 22:31:41,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382031432] [2023-11-06 22:31:41,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:41,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:31:41,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:41,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:31:41,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=459, Unknown=1, NotChecked=0, Total=552 [2023-11-06 22:31:43,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 883 [2023-11-06 22:31:43,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 760 transitions, 12463 flow. Second operand has 24 states, 24 states have (on average 270.8333333333333) internal successors, (6500), 24 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:43,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:43,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 883 [2023-11-06 22:31:43,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:46,657 INFO L124 PetriNetUnfolderBase]: 1771/2769 cut-off events. [2023-11-06 22:31:46,657 INFO L125 PetriNetUnfolderBase]: For 19868/19868 co-relation queries the response was YES. [2023-11-06 22:31:46,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22844 conditions, 2769 events. 1771/2769 cut-off events. For 19868/19868 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 14842 event pairs, 13 based on Foata normal form. 11/2571 useless extension candidates. Maximal degree in co-relation 22693. Up to 1088 conditions per place. [2023-11-06 22:31:46,695 INFO L140 encePairwiseOnDemand]: 871/883 looper letters, 363 selfloop transitions, 537 changer transitions 11/911 dead transitions. [2023-11-06 22:31:46,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 911 transitions, 15778 flow [2023-11-06 22:31:46,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:31:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 22:31:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 11002 transitions. [2023-11-06 22:31:46,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31149490373725935 [2023-11-06 22:31:46,711 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 11002 transitions. [2023-11-06 22:31:46,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 11002 transitions. [2023-11-06 22:31:46,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:46,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 11002 transitions. [2023-11-06 22:31:46,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 275.05) internal successors, (11002), 40 states have internal predecessors, (11002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:46,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 883.0) internal successors, (36203), 41 states have internal predecessors, (36203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:46,761 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 883.0) internal successors, (36203), 41 states have internal predecessors, (36203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:46,761 INFO L175 Difference]: Start difference. First operand has 236 places, 760 transitions, 12463 flow. Second operand 40 states and 11002 transitions. [2023-11-06 22:31:46,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 911 transitions, 15778 flow [2023-11-06 22:31:47,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 911 transitions, 15481 flow, removed 58 selfloop flow, removed 11 redundant places. [2023-11-06 22:31:47,194 INFO L231 Difference]: Finished difference. Result has 270 places, 808 transitions, 14519 flow [2023-11-06 22:31:47,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=12001, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=14519, PETRI_PLACES=270, PETRI_TRANSITIONS=808} [2023-11-06 22:31:47,195 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 249 predicate places. [2023-11-06 22:31:47,195 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 808 transitions, 14519 flow [2023-11-06 22:31:47,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 270.8333333333333) internal successors, (6500), 24 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:47,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:47,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:47,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:47,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:47,396 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:31:47,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:47,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1106971222, now seen corresponding path program 6 times [2023-11-06 22:31:47,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:47,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650338582] [2023-11-06 22:31:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:47,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:48,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:48,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650338582] [2023-11-06 22:31:48,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650338582] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:48,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508786965] [2023-11-06 22:31:48,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:31:48,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:48,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:48,035 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:48,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:31:48,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:31:48,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:48,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:31:48,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:48,497 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 22:31:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:48,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:48,726 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:48,726 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 172 treesize of output 124 [2023-11-06 22:31:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:48,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508786965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:48,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:48,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 19 [2023-11-06 22:31:48,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063010623] [2023-11-06 22:31:48,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:48,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:31:48,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:48,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:31:48,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:31:51,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 883 [2023-11-06 22:31:51,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 808 transitions, 14519 flow. Second operand has 20 states, 20 states have (on average 322.1) internal successors, (6442), 20 states have internal predecessors, (6442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:51,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:51,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 883 [2023-11-06 22:31:51,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:52,756 INFO L124 PetriNetUnfolderBase]: 1791/2811 cut-off events. [2023-11-06 22:31:52,756 INFO L125 PetriNetUnfolderBase]: For 25524/25524 co-relation queries the response was YES. [2023-11-06 22:31:52,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24780 conditions, 2811 events. 1791/2811 cut-off events. For 25524/25524 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 15166 event pairs, 38 based on Foata normal form. 1/2668 useless extension candidates. Maximal degree in co-relation 24606. Up to 1754 conditions per place. [2023-11-06 22:31:52,790 INFO L140 encePairwiseOnDemand]: 872/883 looper letters, 504 selfloop transitions, 357 changer transitions 6/867 dead transitions. [2023-11-06 22:31:52,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 867 transitions, 16888 flow [2023-11-06 22:31:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:31:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:31:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 7806 transitions. [2023-11-06 22:31:52,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36834654586636467 [2023-11-06 22:31:52,800 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 7806 transitions. [2023-11-06 22:31:52,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 7806 transitions. [2023-11-06 22:31:52,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:52,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 7806 transitions. [2023-11-06 22:31:52,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 325.25) internal successors, (7806), 24 states have internal predecessors, (7806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:52,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 883.0) internal successors, (22075), 25 states have internal predecessors, (22075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:52,831 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 883.0) internal successors, (22075), 25 states have internal predecessors, (22075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:52,832 INFO L175 Difference]: Start difference. First operand has 270 places, 808 transitions, 14519 flow. Second operand 24 states and 7806 transitions. [2023-11-06 22:31:52,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 867 transitions, 16888 flow [2023-11-06 22:31:53,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 867 transitions, 15781 flow, removed 156 selfloop flow, removed 23 redundant places. [2023-11-06 22:31:53,369 INFO L231 Difference]: Finished difference. Result has 273 places, 824 transitions, 14641 flow [2023-11-06 22:31:53,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=13432, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=14641, PETRI_PLACES=273, PETRI_TRANSITIONS=824} [2023-11-06 22:31:53,370 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 252 predicate places. [2023-11-06 22:31:53,371 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 824 transitions, 14641 flow [2023-11-06 22:31:53,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 322.1) internal successors, (6442), 20 states have internal predecessors, (6442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:53,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:53,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:53,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:53,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:31:53,578 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:31:53,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:53,579 INFO L85 PathProgramCache]: Analyzing trace with hash -682577806, now seen corresponding path program 7 times [2023-11-06 22:31:53,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:53,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242072737] [2023-11-06 22:31:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:53,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:54,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:54,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242072737] [2023-11-06 22:31:54,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242072737] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:54,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713233770] [2023-11-06 22:31:54,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:31:54,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:54,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:54,673 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:54,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:31:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:54,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:31:54,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:54,848 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 22:31:54,910 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 22:31:55,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:31:55,102 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 22:31:55,214 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 89 treesize of output 61 [2023-11-06 22:31:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:55,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:55,539 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_558 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_558) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (< 2147483647 (+ c_~bag2~0 .cse0)) (= (+ c_~bag1~0 c_~sum1~0) (+ c_~bag2~0 .cse0 c_~sum2~0)) (< (+ c_~bag2~0 .cse0 2147483648) 0)))) is different from false [2023-11-06 22:31:55,748 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_557 (Array Int Int)) (v_ArrVal_558 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_557))) (let ((.cse1 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_558) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) .cse1) (< 2147483647 .cse1) (< (+ .cse1 2147483648) 0))))) is different from false [2023-11-06 22:31:55,759 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:55,759 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 97 treesize of output 61 [2023-11-06 22:31:55,764 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 228 treesize of output 204 [2023-11-06 22:31:55,780 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 69 treesize of output 63 [2023-11-06 22:31:55,784 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 128 treesize of output 116 [2023-11-06 22:31:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-06 22:31:55,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713233770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:55,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:55,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-06 22:31:55,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495180513] [2023-11-06 22:31:55,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:55,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:31:55,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:55,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:31:55,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=504, Unknown=12, NotChecked=94, Total=702 [2023-11-06 22:31:56,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 883 [2023-11-06 22:31:56,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 824 transitions, 14641 flow. Second operand has 27 states, 27 states have (on average 277.5925925925926) internal successors, (7495), 27 states have internal predecessors, (7495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:56,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:56,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 883 [2023-11-06 22:31:56,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:57,538 INFO L124 PetriNetUnfolderBase]: 1794/2818 cut-off events. [2023-11-06 22:31:57,538 INFO L125 PetriNetUnfolderBase]: For 24562/24562 co-relation queries the response was YES. [2023-11-06 22:31:57,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24892 conditions, 2818 events. 1794/2818 cut-off events. For 24562/24562 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 15298 event pairs, 50 based on Foata normal form. 1/2675 useless extension candidates. Maximal degree in co-relation 24817. Up to 1901 conditions per place. [2023-11-06 22:31:57,578 INFO L140 encePairwiseOnDemand]: 872/883 looper letters, 540 selfloop transitions, 312 changer transitions 4/856 dead transitions. [2023-11-06 22:31:57,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 856 transitions, 16643 flow [2023-11-06 22:31:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:31:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:31:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3108 transitions. [2023-11-06 22:31:57,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31998352723154533 [2023-11-06 22:31:57,584 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3108 transitions. [2023-11-06 22:31:57,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3108 transitions. [2023-11-06 22:31:57,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:57,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3108 transitions. [2023-11-06 22:31:57,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 282.54545454545456) internal successors, (3108), 11 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:57,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 883.0) internal successors, (10596), 12 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:57,601 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 883.0) internal successors, (10596), 12 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:57,601 INFO L175 Difference]: Start difference. First operand has 273 places, 824 transitions, 14641 flow. Second operand 11 states and 3108 transitions. [2023-11-06 22:31:57,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 856 transitions, 16643 flow [2023-11-06 22:31:58,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 856 transitions, 16531 flow, removed 21 selfloop flow, removed 15 redundant places. [2023-11-06 22:31:58,110 INFO L231 Difference]: Finished difference. Result has 269 places, 825 transitions, 15428 flow [2023-11-06 22:31:58,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=14529, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15428, PETRI_PLACES=269, PETRI_TRANSITIONS=825} [2023-11-06 22:31:58,112 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 248 predicate places. [2023-11-06 22:31:58,112 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 825 transitions, 15428 flow [2023-11-06 22:31:58,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 277.5925925925926) internal successors, (7495), 27 states have internal predecessors, (7495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:58,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:58,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:58,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:58,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:31:58,319 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:31:58,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash 329532752, now seen corresponding path program 8 times [2023-11-06 22:31:58,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:58,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230499457] [2023-11-06 22:31:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:58,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:59,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:59,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230499457] [2023-11-06 22:31:59,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230499457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:59,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766396617] [2023-11-06 22:31:59,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:31:59,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:59,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:59,278 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:59,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:31:59,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:31:59,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:59,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:31:59,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:59,754 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 31 treesize of output 15 [2023-11-06 22:31:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:59,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:00,018 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:00,019 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 172 treesize of output 124 [2023-11-06 22:32:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:00,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766396617] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:00,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:00,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 23 [2023-11-06 22:32:00,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802662959] [2023-11-06 22:32:00,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:00,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:32:00,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:00,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:32:00,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:32:03,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 883 [2023-11-06 22:32:03,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 825 transitions, 15428 flow. Second operand has 24 states, 24 states have (on average 313.8333333333333) internal successors, (7532), 24 states have internal predecessors, (7532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:03,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:03,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 883 [2023-11-06 22:32:03,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:05,994 INFO L124 PetriNetUnfolderBase]: 1894/2968 cut-off events. [2023-11-06 22:32:05,994 INFO L125 PetriNetUnfolderBase]: For 30085/30085 co-relation queries the response was YES. [2023-11-06 22:32:06,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27430 conditions, 2968 events. 1894/2968 cut-off events. For 30085/30085 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 16157 event pairs, 42 based on Foata normal form. 1/2815 useless extension candidates. Maximal degree in co-relation 27251. Up to 1535 conditions per place. [2023-11-06 22:32:06,031 INFO L140 encePairwiseOnDemand]: 872/883 looper letters, 302 selfloop transitions, 627 changer transitions 4/933 dead transitions. [2023-11-06 22:32:06,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 933 transitions, 18910 flow [2023-11-06 22:32:06,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:32:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:32:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 5723 transitions. [2023-11-06 22:32:06,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36007298351579214 [2023-11-06 22:32:06,039 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 5723 transitions. [2023-11-06 22:32:06,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 5723 transitions. [2023-11-06 22:32:06,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:06,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 5723 transitions. [2023-11-06 22:32:06,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 317.94444444444446) internal successors, (5723), 18 states have internal predecessors, (5723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:06,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 883.0) internal successors, (16777), 19 states have internal predecessors, (16777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:06,062 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 883.0) internal successors, (16777), 19 states have internal predecessors, (16777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:06,062 INFO L175 Difference]: Start difference. First operand has 269 places, 825 transitions, 15428 flow. Second operand 18 states and 5723 transitions. [2023-11-06 22:32:06,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 933 transitions, 18910 flow [2023-11-06 22:32:06,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 933 transitions, 18064 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-11-06 22:32:06,555 INFO L231 Difference]: Finished difference. Result has 282 places, 888 transitions, 18051 flow [2023-11-06 22:32:06,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=14603, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18051, PETRI_PLACES=282, PETRI_TRANSITIONS=888} [2023-11-06 22:32:06,557 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 261 predicate places. [2023-11-06 22:32:06,557 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 888 transitions, 18051 flow [2023-11-06 22:32:06,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 313.8333333333333) internal successors, (7532), 24 states have internal predecessors, (7532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:06,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:06,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:06,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:06,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:32:06,761 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:32:06,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:06,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1966409956, now seen corresponding path program 9 times [2023-11-06 22:32:06,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:06,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114521842] [2023-11-06 22:32:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:06,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:07,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:07,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114521842] [2023-11-06 22:32:07,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114521842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:07,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721132061] [2023-11-06 22:32:07,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:32:07,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:07,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:07,174 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:07,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:32:07,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:32:07,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:07,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:32:07,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:07,349 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 22:32:07,393 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 22:32:07,480 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 22:32:07,736 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 31 treesize of output 15 [2023-11-06 22:32:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:07,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:08,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721132061] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:08,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:08,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 23 [2023-11-06 22:32:08,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640636270] [2023-11-06 22:32:08,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:08,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:32:08,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:32:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=467, Unknown=1, NotChecked=0, Total=552 [2023-11-06 22:32:10,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 883 [2023-11-06 22:32:10,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 888 transitions, 18051 flow. Second operand has 24 states, 24 states have (on average 277.7916666666667) internal successors, (6667), 24 states have internal predecessors, (6667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:10,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:10,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 883 [2023-11-06 22:32:10,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:12,392 INFO L124 PetriNetUnfolderBase]: 1900/2986 cut-off events. [2023-11-06 22:32:12,392 INFO L125 PetriNetUnfolderBase]: For 30567/30567 co-relation queries the response was YES. [2023-11-06 22:32:12,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29493 conditions, 2986 events. 1900/2986 cut-off events. For 30567/30567 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 16272 event pairs, 76 based on Foata normal form. 1/2829 useless extension candidates. Maximal degree in co-relation 29315. Up to 2621 conditions per place. [2023-11-06 22:32:12,435 INFO L140 encePairwiseOnDemand]: 873/883 looper letters, 791 selfloop transitions, 116 changer transitions 5/912 dead transitions. [2023-11-06 22:32:12,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 912 transitions, 20164 flow [2023-11-06 22:32:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:32:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:32:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2821 transitions. [2023-11-06 22:32:12,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3194790486976217 [2023-11-06 22:32:12,441 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2821 transitions. [2023-11-06 22:32:12,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2821 transitions. [2023-11-06 22:32:12,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:12,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2821 transitions. [2023-11-06 22:32:12,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 282.1) internal successors, (2821), 10 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:12,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:12,455 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 883.0) internal successors, (9713), 11 states have internal predecessors, (9713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:12,456 INFO L175 Difference]: Start difference. First operand has 282 places, 888 transitions, 18051 flow. Second operand 10 states and 2821 transitions. [2023-11-06 22:32:12,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 912 transitions, 20164 flow [2023-11-06 22:32:13,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 912 transitions, 20023 flow, removed 58 selfloop flow, removed 4 redundant places. [2023-11-06 22:32:13,223 INFO L231 Difference]: Finished difference. Result has 289 places, 893 transitions, 18332 flow [2023-11-06 22:32:13,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=17918, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18332, PETRI_PLACES=289, PETRI_TRANSITIONS=893} [2023-11-06 22:32:13,225 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 268 predicate places. [2023-11-06 22:32:13,225 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 893 transitions, 18332 flow [2023-11-06 22:32:13,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 277.7916666666667) internal successors, (6667), 24 states have internal predecessors, (6667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:13,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:13,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:13,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:13,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:32:13,427 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:32:13,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:13,427 INFO L85 PathProgramCache]: Analyzing trace with hash 330722044, now seen corresponding path program 10 times [2023-11-06 22:32:13,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:13,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130558953] [2023-11-06 22:32:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:13,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:13,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:13,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130558953] [2023-11-06 22:32:13,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130558953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:13,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807108367] [2023-11-06 22:32:13,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:32:13,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:13,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:13,905 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:13,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:32:14,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:32:14,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:14,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:32:14,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:14,431 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 31 treesize of output 15 [2023-11-06 22:32:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:14,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:14,760 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:32:14,760 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 172 treesize of output 120 [2023-11-06 22:32:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:14,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807108367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:14,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:14,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-11-06 22:32:14,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370712639] [2023-11-06 22:32:14,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:14,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:32:14,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:32:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:32:16,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 883 [2023-11-06 22:32:16,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 893 transitions, 18332 flow. Second operand has 23 states, 23 states have (on average 319.9130434782609) internal successors, (7358), 23 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:16,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:16,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 883 [2023-11-06 22:32:16,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:20,080 INFO L124 PetriNetUnfolderBase]: 2026/3171 cut-off events. [2023-11-06 22:32:20,080 INFO L125 PetriNetUnfolderBase]: For 37189/37189 co-relation queries the response was YES. [2023-11-06 22:32:20,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31990 conditions, 3171 events. 2026/3171 cut-off events. For 37189/37189 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 17531 event pairs, 6 based on Foata normal form. 13/3019 useless extension candidates. Maximal degree in co-relation 31810. Up to 1043 conditions per place. [2023-11-06 22:32:20,127 INFO L140 encePairwiseOnDemand]: 871/883 looper letters, 178 selfloop transitions, 863 changer transitions 6/1047 dead transitions. [2023-11-06 22:32:20,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 1047 transitions, 22515 flow [2023-11-06 22:32:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-06 22:32:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-06 22:32:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 14580 transitions. [2023-11-06 22:32:20,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669309173272933 [2023-11-06 22:32:20,148 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 14580 transitions. [2023-11-06 22:32:20,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 14580 transitions. [2023-11-06 22:32:20,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:20,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 14580 transitions. [2023-11-06 22:32:20,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 324.0) internal successors, (14580), 45 states have internal predecessors, (14580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:20,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 883.0) internal successors, (40618), 46 states have internal predecessors, (40618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:20,213 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 883.0) internal successors, (40618), 46 states have internal predecessors, (40618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:20,213 INFO L175 Difference]: Start difference. First operand has 289 places, 893 transitions, 18332 flow. Second operand 45 states and 14580 transitions. [2023-11-06 22:32:20,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 1047 transitions, 22515 flow [2023-11-06 22:32:20,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1047 transitions, 22201 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-11-06 22:32:20,833 INFO L231 Difference]: Finished difference. Result has 326 places, 966 transitions, 21745 flow [2023-11-06 22:32:20,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=17182, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=748, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=21745, PETRI_PLACES=326, PETRI_TRANSITIONS=966} [2023-11-06 22:32:20,835 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 305 predicate places. [2023-11-06 22:32:20,835 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 966 transitions, 21745 flow [2023-11-06 22:32:20,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 319.9130434782609) internal successors, (7358), 23 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:20,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:20,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:20,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:21,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:32:21,042 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:32:21,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:21,043 INFO L85 PathProgramCache]: Analyzing trace with hash -410814386, now seen corresponding path program 11 times [2023-11-06 22:32:21,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:21,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630196016] [2023-11-06 22:32:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:21,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:21,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:21,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630196016] [2023-11-06 22:32:21,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630196016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:21,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211972875] [2023-11-06 22:32:21,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:32:21,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:21,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:21,725 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:21,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:32:21,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:32:21,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:21,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 22:32:21,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:22,241 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 31 treesize of output 15 [2023-11-06 22:32:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:22,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:22,524 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:22,525 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 172 treesize of output 124 [2023-11-06 22:32:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:22,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211972875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:22,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:22,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-11-06 22:32:22,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64510265] [2023-11-06 22:32:22,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:22,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:32:22,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:22,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:32:22,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:32:26,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 883 [2023-11-06 22:32:26,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 966 transitions, 21745 flow. Second operand has 23 states, 23 states have (on average 314.8695652173913) internal successors, (7242), 23 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:26,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:26,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 883 [2023-11-06 22:32:26,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:29,290 INFO L124 PetriNetUnfolderBase]: 2241/3480 cut-off events. [2023-11-06 22:32:29,290 INFO L125 PetriNetUnfolderBase]: For 43981/43981 co-relation queries the response was YES. [2023-11-06 22:32:29,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37674 conditions, 3480 events. 2241/3480 cut-off events. For 43981/43981 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 19305 event pairs, 39 based on Foata normal form. 1/3308 useless extension candidates. Maximal degree in co-relation 37481. Up to 1158 conditions per place. [2023-11-06 22:32:29,339 INFO L140 encePairwiseOnDemand]: 871/883 looper letters, 255 selfloop transitions, 880 changer transitions 7/1142 dead transitions. [2023-11-06 22:32:29,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1142 transitions, 26757 flow [2023-11-06 22:32:29,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:32:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 22:32:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 11803 transitions. [2023-11-06 22:32:29,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36126840317100795 [2023-11-06 22:32:29,351 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 11803 transitions. [2023-11-06 22:32:29,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 11803 transitions. [2023-11-06 22:32:29,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:29,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 11803 transitions. [2023-11-06 22:32:29,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 319.0) internal successors, (11803), 37 states have internal predecessors, (11803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:29,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 883.0) internal successors, (33554), 38 states have internal predecessors, (33554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:29,382 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 883.0) internal successors, (33554), 38 states have internal predecessors, (33554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:29,382 INFO L175 Difference]: Start difference. First operand has 326 places, 966 transitions, 21745 flow. Second operand 37 states and 11803 transitions. [2023-11-06 22:32:29,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1142 transitions, 26757 flow [2023-11-06 22:32:30,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1142 transitions, 26023 flow, removed 206 selfloop flow, removed 16 redundant places. [2023-11-06 22:32:30,312 INFO L231 Difference]: Finished difference. Result has 352 places, 1058 transitions, 26050 flow [2023-11-06 22:32:30,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=21145, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=790, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=26050, PETRI_PLACES=352, PETRI_TRANSITIONS=1058} [2023-11-06 22:32:30,314 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 331 predicate places. [2023-11-06 22:32:30,314 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1058 transitions, 26050 flow [2023-11-06 22:32:30,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 314.8695652173913) internal successors, (7242), 23 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:30,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:30,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:30,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:30,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:32:30,521 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:32:30,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:30,522 INFO L85 PathProgramCache]: Analyzing trace with hash -506982662, now seen corresponding path program 12 times [2023-11-06 22:32:30,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:30,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592246233] [2023-11-06 22:32:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:30,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:31,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:31,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592246233] [2023-11-06 22:32:31,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592246233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:31,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615603453] [2023-11-06 22:32:31,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:32:31,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:31,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:31,321 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:31,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:32:31,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:32:31,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:31,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:32:31,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:31,492 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 22:32:31,543 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 22:32:31,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:32:31,742 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 22:32:31,812 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 89 treesize of output 61 [2023-11-06 22:32:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:31,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:32,062 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_684 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (< 2147483647 (+ .cse0 c_~bag2~0)) (< (+ .cse0 c_~bag2~0 2147483648) 0) (= c_~sum1~0 (+ .cse0 c_~bag2~0 c_~sum2~0))))) is different from false [2023-11-06 22:32:32,078 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_684 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (< 2147483647 (+ .cse0 c_~bag2~0)) (= (+ c_~bag1~0 c_~sum1~0) (+ .cse0 c_~bag2~0 c_~sum2~0)) (< (+ .cse0 c_~bag2~0 2147483648) 0)))) is different from false [2023-11-06 22:32:32,156 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_684 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (< 2147483647 (+ .cse0 c_~bag2~0)) (= (+ c_~bag1~0 c_~sum1~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_~i~0 4)))) (+ .cse0 c_~bag2~0 c_~sum2~0)) (< (+ .cse0 c_~bag2~0 2147483648) 0)))) is different from false [2023-11-06 22:32:32,189 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_684 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_683))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (= .cse0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (< 2147483647 .cse0) (< (+ .cse0 2147483648) 0))))) is different from false [2023-11-06 22:32:32,198 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:32,198 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 97 treesize of output 61 [2023-11-06 22:32:32,201 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 228 treesize of output 204 [2023-11-06 22:32:32,208 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 134 treesize of output 122 [2023-11-06 22:32:32,214 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 63 treesize of output 57 [2023-11-06 22:32:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-06 22:32:32,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615603453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:32,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:32,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-06 22:32:32,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482657420] [2023-11-06 22:32:32,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:32,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:32:32,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:32,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:32:32,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=426, Unknown=11, NotChecked=180, Total=702 [2023-11-06 22:32:32,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 883 [2023-11-06 22:32:32,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1058 transitions, 26050 flow. Second operand has 27 states, 27 states have (on average 277.55555555555554) internal successors, (7494), 27 states have internal predecessors, (7494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:32,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:32,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 883 [2023-11-06 22:32:32,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:34,344 INFO L124 PetriNetUnfolderBase]: 2236/3479 cut-off events. [2023-11-06 22:32:34,345 INFO L125 PetriNetUnfolderBase]: For 51326/51326 co-relation queries the response was YES. [2023-11-06 22:32:34,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40294 conditions, 3479 events. 2236/3479 cut-off events. For 51326/51326 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 19327 event pairs, 49 based on Foata normal form. 1/3285 useless extension candidates. Maximal degree in co-relation 40208. Up to 2472 conditions per place. [2023-11-06 22:32:34,422 INFO L140 encePairwiseOnDemand]: 873/883 looper letters, 729 selfloop transitions, 359 changer transitions 4/1092 dead transitions. [2023-11-06 22:32:34,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1092 transitions, 28637 flow [2023-11-06 22:32:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:32:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:32:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3108 transitions. [2023-11-06 22:32:34,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31998352723154533 [2023-11-06 22:32:34,428 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3108 transitions. [2023-11-06 22:32:34,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3108 transitions. [2023-11-06 22:32:34,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:34,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3108 transitions. [2023-11-06 22:32:34,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 282.54545454545456) internal successors, (3108), 11 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:34,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 883.0) internal successors, (10596), 12 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:34,442 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 883.0) internal successors, (10596), 12 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:34,442 INFO L175 Difference]: Start difference. First operand has 352 places, 1058 transitions, 26050 flow. Second operand 11 states and 3108 transitions. [2023-11-06 22:32:34,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1092 transitions, 28637 flow [2023-11-06 22:32:35,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1092 transitions, 28066 flow, removed 51 selfloop flow, removed 19 redundant places. [2023-11-06 22:32:36,004 INFO L231 Difference]: Finished difference. Result has 344 places, 1059 transitions, 26518 flow [2023-11-06 22:32:36,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=25480, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=26518, PETRI_PLACES=344, PETRI_TRANSITIONS=1059} [2023-11-06 22:32:36,013 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 323 predicate places. [2023-11-06 22:32:36,013 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1059 transitions, 26518 flow [2023-11-06 22:32:36,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 277.55555555555554) internal successors, (7494), 27 states have internal predecessors, (7494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:36,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:36,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:36,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:36,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:32:36,221 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:32:36,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:36,222 INFO L85 PathProgramCache]: Analyzing trace with hash 519322862, now seen corresponding path program 13 times [2023-11-06 22:32:36,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:36,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76856224] [2023-11-06 22:32:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:36,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:37,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:37,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76856224] [2023-11-06 22:32:37,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76856224] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:37,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880482269] [2023-11-06 22:32:37,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:32:37,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:37,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:37,340 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:37,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:32:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:37,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:32:37,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:37,509 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 22:32:37,544 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 22:32:37,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:32:37,729 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 22:32:37,806 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 89 treesize of output 61 [2023-11-06 22:32:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:37,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:38,201 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_711 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_711) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (< 2147483647 (+ c_~bag2~0 .cse0)) (< (+ c_~bag2~0 .cse0 2147483648) 0) (= (+ |c_thread1Thread1of1ForFork0_plus_~a#1| (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_~i~0 4))) |c_thread1Thread1of1ForFork0_plus_~b#1|) (+ c_~bag2~0 .cse0 c_~sum2~0))))) is different from false [2023-11-06 22:32:38,323 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_711 (Array Int Int)) (v_ArrVal_710 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_710))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_711) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< 2147483647 .cse0) (= .cse0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (< (+ .cse0 2147483648) 0))))) is different from false [2023-11-06 22:32:38,338 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:38,339 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 97 treesize of output 61 [2023-11-06 22:32:38,344 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 488 treesize of output 440 [2023-11-06 22:32:38,351 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 64 treesize of output 52 [2023-11-06 22:32:38,356 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 7 [2023-11-06 22:32:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-06 22:32:38,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880482269] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:38,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:38,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:32:38,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813239822] [2023-11-06 22:32:38,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:38,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:32:38,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:32:38,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=462, Unknown=13, NotChecked=90, Total=650 [2023-11-06 22:32:38,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 883 [2023-11-06 22:32:38,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1059 transitions, 26518 flow. Second operand has 26 states, 26 states have (on average 261.5769230769231) internal successors, (6801), 26 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:38,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:38,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 883 [2023-11-06 22:32:38,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:40,719 INFO L124 PetriNetUnfolderBase]: 2239/3486 cut-off events. [2023-11-06 22:32:40,720 INFO L125 PetriNetUnfolderBase]: For 52985/52985 co-relation queries the response was YES. [2023-11-06 22:32:40,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41163 conditions, 3486 events. 2239/3486 cut-off events. For 52985/52985 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 19350 event pairs, 51 based on Foata normal form. 1/3286 useless extension candidates. Maximal degree in co-relation 40960. Up to 2612 conditions per place. [2023-11-06 22:32:40,808 INFO L140 encePairwiseOnDemand]: 873/883 looper letters, 722 selfloop transitions, 364 changer transitions 4/1090 dead transitions. [2023-11-06 22:32:40,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1090 transitions, 29097 flow [2023-11-06 22:32:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:32:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:32:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2934 transitions. [2023-11-06 22:32:40,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020693915371152 [2023-11-06 22:32:40,813 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2934 transitions. [2023-11-06 22:32:40,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2934 transitions. [2023-11-06 22:32:40,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:40,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2934 transitions. [2023-11-06 22:32:40,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 266.72727272727275) internal successors, (2934), 11 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:40,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 883.0) internal successors, (10596), 12 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:40,823 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 883.0) internal successors, (10596), 12 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:40,823 INFO L175 Difference]: Start difference. First operand has 344 places, 1059 transitions, 26518 flow. Second operand 11 states and 2934 transitions. [2023-11-06 22:32:40,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1090 transitions, 29097 flow [2023-11-06 22:32:42,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1090 transitions, 28065 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-11-06 22:32:42,192 INFO L231 Difference]: Finished difference. Result has 346 places, 1061 transitions, 26598 flow [2023-11-06 22:32:42,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=25486, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=26598, PETRI_PLACES=346, PETRI_TRANSITIONS=1061} [2023-11-06 22:32:42,194 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 325 predicate places. [2023-11-06 22:32:42,194 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 1061 transitions, 26598 flow [2023-11-06 22:32:42,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 261.5769230769231) internal successors, (6801), 26 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:42,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:42,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:42,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-06 22:32:42,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:32:42,402 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:32:42,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:42,403 INFO L85 PathProgramCache]: Analyzing trace with hash -801699844, now seen corresponding path program 14 times [2023-11-06 22:32:42,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:42,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356608154] [2023-11-06 22:32:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:42,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:43,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:43,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356608154] [2023-11-06 22:32:43,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356608154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:43,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316036116] [2023-11-06 22:32:43,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:32:43,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:43,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:43,164 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:43,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:32:43,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:32:43,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:43,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:32:43,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:43,361 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 22:32:43,411 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 22:32:43,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:32:43,559 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 22:32:43,654 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 89 treesize of output 61 [2023-11-06 22:32:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:43,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:44,093 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_739 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_739) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (< (+ c_~bag2~0 .cse0 2147483648) 0) (< 2147483647 (+ c_~bag2~0 .cse0)) (= (+ c_~bag2~0 c_~sum2~0 .cse0) (+ c_~bag1~0 c_~sum1~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_~i~0 4)))))))) is different from false [2023-11-06 22:32:44,129 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_739 (Array Int Int)) (v_ArrVal_738 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_738))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_739) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (= .cse0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (< (+ .cse0 2147483648) 0) (< 2147483647 .cse0))))) is different from false [2023-11-06 22:32:44,138 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:44,140 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 97 treesize of output 61 [2023-11-06 22:32:44,143 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 228 treesize of output 204 [2023-11-06 22:32:44,153 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 69 treesize of output 63 [2023-11-06 22:32:44,158 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 128 treesize of output 116 [2023-11-06 22:32:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-06 22:32:44,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316036116] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:44,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:44,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2023-11-06 22:32:44,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52270987] [2023-11-06 22:32:44,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:44,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:32:44,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:32:44,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=417, Unknown=13, NotChecked=86, Total=600 [2023-11-06 22:32:44,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 883 [2023-11-06 22:32:44,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1061 transitions, 26598 flow. Second operand has 25 states, 25 states have (on average 261.68) internal successors, (6542), 25 states have internal predecessors, (6542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:44,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:44,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 883 [2023-11-06 22:32:44,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:46,251 INFO L124 PetriNetUnfolderBase]: 2264/3529 cut-off events. [2023-11-06 22:32:46,251 INFO L125 PetriNetUnfolderBase]: For 50838/50838 co-relation queries the response was YES. [2023-11-06 22:32:46,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41716 conditions, 3529 events. 2264/3529 cut-off events. For 50838/50838 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 19649 event pairs, 49 based on Foata normal form. 1/3327 useless extension candidates. Maximal degree in co-relation 41495. Up to 2618 conditions per place. [2023-11-06 22:32:46,314 INFO L140 encePairwiseOnDemand]: 873/883 looper letters, 728 selfloop transitions, 368 changer transitions 4/1100 dead transitions. [2023-11-06 22:32:46,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1100 transitions, 29491 flow [2023-11-06 22:32:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:32:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:32:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2935 transitions. [2023-11-06 22:32:46,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30217234633995677 [2023-11-06 22:32:46,319 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2935 transitions. [2023-11-06 22:32:46,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2935 transitions. [2023-11-06 22:32:46,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:46,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2935 transitions. [2023-11-06 22:32:46,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 266.8181818181818) internal successors, (2935), 11 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:46,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 883.0) internal successors, (10596), 12 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:46,328 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 883.0) internal successors, (10596), 12 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:46,329 INFO L175 Difference]: Start difference. First operand has 346 places, 1061 transitions, 26598 flow. Second operand 11 states and 2935 transitions. [2023-11-06 22:32:46,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1100 transitions, 29491 flow [2023-11-06 22:32:47,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1100 transitions, 28927 flow, removed 19 selfloop flow, removed 7 redundant places. [2023-11-06 22:32:47,598 INFO L231 Difference]: Finished difference. Result has 351 places, 1072 transitions, 27347 flow [2023-11-06 22:32:47,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=26048, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=27347, PETRI_PLACES=351, PETRI_TRANSITIONS=1072} [2023-11-06 22:32:47,600 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 330 predicate places. [2023-11-06 22:32:47,600 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1072 transitions, 27347 flow [2023-11-06 22:32:47,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 261.68) internal successors, (6542), 25 states have internal predecessors, (6542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:47,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:47,601 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:47,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:47,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:47,809 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:32:47,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:47,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1311645644, now seen corresponding path program 15 times [2023-11-06 22:32:47,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:47,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964769437] [2023-11-06 22:32:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:47,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:47,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:47,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964769437] [2023-11-06 22:32:47,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964769437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:47,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510312548] [2023-11-06 22:32:47,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:32:47,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:47,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:47,941 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:47,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:32:48,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:32:48,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:48,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:32:48,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:48,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:48,541 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:32:48,541 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 248 treesize of output 160 [2023-11-06 22:32:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:48,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510312548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:48,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:48,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-06 22:32:48,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606697513] [2023-11-06 22:32:48,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:48,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:32:48,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:48,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:32:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:32:49,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 883 [2023-11-06 22:32:49,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1072 transitions, 27347 flow. Second operand has 13 states, 13 states have (on average 347.7692307692308) internal successors, (4521), 13 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:49,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:49,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 883 [2023-11-06 22:32:49,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:51,267 INFO L124 PetriNetUnfolderBase]: 2356/3871 cut-off events. [2023-11-06 22:32:51,267 INFO L125 PetriNetUnfolderBase]: For 64174/64174 co-relation queries the response was YES. [2023-11-06 22:32:51,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45855 conditions, 3871 events. 2356/3871 cut-off events. For 64174/64174 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 23757 event pairs, 318 based on Foata normal form. 260/3892 useless extension candidates. Maximal degree in co-relation 45513. Up to 1470 conditions per place. [2023-11-06 22:32:51,323 INFO L140 encePairwiseOnDemand]: 878/883 looper letters, 913 selfloop transitions, 253 changer transitions 26/1192 dead transitions. [2023-11-06 22:32:51,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1192 transitions, 33006 flow [2023-11-06 22:32:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:32:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:32:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2821 transitions. [2023-11-06 22:32:51,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39934881087202717 [2023-11-06 22:32:51,326 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2821 transitions. [2023-11-06 22:32:51,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2821 transitions. [2023-11-06 22:32:51,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:51,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2821 transitions. [2023-11-06 22:32:51,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 352.625) internal successors, (2821), 8 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:51,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 883.0) internal successors, (7947), 9 states have internal predecessors, (7947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:51,333 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 883.0) internal successors, (7947), 9 states have internal predecessors, (7947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:51,333 INFO L175 Difference]: Start difference. First operand has 351 places, 1072 transitions, 27347 flow. Second operand 8 states and 2821 transitions. [2023-11-06 22:32:51,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1192 transitions, 33006 flow [2023-11-06 22:32:52,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 1192 transitions, 32362 flow, removed 43 selfloop flow, removed 9 redundant places. [2023-11-06 22:32:52,708 INFO L231 Difference]: Finished difference. Result has 350 places, 1011 transitions, 26503 flow [2023-11-06 22:32:52,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=24945, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=26503, PETRI_PLACES=350, PETRI_TRANSITIONS=1011} [2023-11-06 22:32:52,709 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 329 predicate places. [2023-11-06 22:32:52,709 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 1011 transitions, 26503 flow [2023-11-06 22:32:52,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 347.7692307692308) internal successors, (4521), 13 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:52,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:52,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:52,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:52,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-06 22:32:52,911 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:32:52,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1037126842, now seen corresponding path program 16 times [2023-11-06 22:32:52,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:52,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030021850] [2023-11-06 22:32:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:52,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:53,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:53,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030021850] [2023-11-06 22:32:53,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030021850] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:53,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046605034] [2023-11-06 22:32:53,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:32:53,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:53,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:53,037 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:53,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:32:53,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:32:53,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:53,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:32:53,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:53,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:53,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046605034] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:53,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:53,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:32:53,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110066962] [2023-11-06 22:32:53,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:53,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:32:53,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:32:53,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:32:53,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 883 [2023-11-06 22:32:53,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 1011 transitions, 26503 flow. Second operand has 12 states, 12 states have (on average 362.5833333333333) internal successors, (4351), 12 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:53,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:53,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 883 [2023-11-06 22:32:53,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:54,935 INFO L124 PetriNetUnfolderBase]: 1412/2278 cut-off events. [2023-11-06 22:32:54,935 INFO L125 PetriNetUnfolderBase]: For 38484/38484 co-relation queries the response was YES. [2023-11-06 22:32:54,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26958 conditions, 2278 events. 1412/2278 cut-off events. For 38484/38484 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 12227 event pairs, 339 based on Foata normal form. 76/2234 useless extension candidates. Maximal degree in co-relation 26805. Up to 1785 conditions per place. [2023-11-06 22:32:54,975 INFO L140 encePairwiseOnDemand]: 875/883 looper letters, 607 selfloop transitions, 51 changer transitions 44/702 dead transitions. [2023-11-06 22:32:54,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 702 transitions, 19172 flow [2023-11-06 22:32:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:32:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:32:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2563 transitions. [2023-11-06 22:32:54,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41465782235884163 [2023-11-06 22:32:54,978 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2563 transitions. [2023-11-06 22:32:54,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2563 transitions. [2023-11-06 22:32:54,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:54,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2563 transitions. [2023-11-06 22:32:54,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 366.14285714285717) internal successors, (2563), 7 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:54,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 883.0) internal successors, (7064), 8 states have internal predecessors, (7064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:54,985 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 883.0) internal successors, (7064), 8 states have internal predecessors, (7064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:54,985 INFO L175 Difference]: Start difference. First operand has 350 places, 1011 transitions, 26503 flow. Second operand 7 states and 2563 transitions. [2023-11-06 22:32:54,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 702 transitions, 19172 flow [2023-11-06 22:32:55,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 702 transitions, 17781 flow, removed 97 selfloop flow, removed 28 redundant places. [2023-11-06 22:32:55,762 INFO L231 Difference]: Finished difference. Result has 306 places, 655 transitions, 15574 flow [2023-11-06 22:32:55,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=16307, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15574, PETRI_PLACES=306, PETRI_TRANSITIONS=655} [2023-11-06 22:32:55,763 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 285 predicate places. [2023-11-06 22:32:55,764 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 655 transitions, 15574 flow [2023-11-06 22:32:55,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 362.5833333333333) internal successors, (4351), 12 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:55,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:55,765 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:55,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:55,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:55,965 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:32:55,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:55,966 INFO L85 PathProgramCache]: Analyzing trace with hash -999411563, now seen corresponding path program 17 times [2023-11-06 22:32:55,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:55,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725036063] [2023-11-06 22:32:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:55,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:32:56,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:56,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725036063] [2023-11-06 22:32:56,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725036063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:56,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586980693] [2023-11-06 22:32:56,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:32:56,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:56,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:56,081 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:56,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:32:56,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:32:56,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:56,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:32:56,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:32:56,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:32:56,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586980693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:56,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:56,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:32:56,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357562647] [2023-11-06 22:32:56,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:56,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:32:56,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:56,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:32:56,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:32:56,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 883 [2023-11-06 22:32:56,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 655 transitions, 15574 flow. Second operand has 13 states, 13 states have (on average 362.38461538461536) internal successors, (4711), 13 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:56,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:56,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 883 [2023-11-06 22:32:56,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:57,370 INFO L124 PetriNetUnfolderBase]: 1344/2086 cut-off events. [2023-11-06 22:32:57,370 INFO L125 PetriNetUnfolderBase]: For 26062/26062 co-relation queries the response was YES. [2023-11-06 22:32:57,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23759 conditions, 2086 events. 1344/2086 cut-off events. For 26062/26062 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 10421 event pairs, 118 based on Foata normal form. 51/2007 useless extension candidates. Maximal degree in co-relation 23689. Up to 734 conditions per place. [2023-11-06 22:32:57,400 INFO L140 encePairwiseOnDemand]: 875/883 looper letters, 395 selfloop transitions, 277 changer transitions 0/672 dead transitions. [2023-11-06 22:32:57,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 672 transitions, 17081 flow [2023-11-06 22:32:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:32:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:32:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3284 transitions. [2023-11-06 22:32:57,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41323769976091607 [2023-11-06 22:32:57,404 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3284 transitions. [2023-11-06 22:32:57,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3284 transitions. [2023-11-06 22:32:57,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:57,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3284 transitions. [2023-11-06 22:32:57,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 364.8888888888889) internal successors, (3284), 9 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:57,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 883.0) internal successors, (8830), 10 states have internal predecessors, (8830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:57,416 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 883.0) internal successors, (8830), 10 states have internal predecessors, (8830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:57,416 INFO L175 Difference]: Start difference. First operand has 306 places, 655 transitions, 15574 flow. Second operand 9 states and 3284 transitions. [2023-11-06 22:32:57,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 672 transitions, 17081 flow [2023-11-06 22:32:57,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 672 transitions, 16545 flow, removed 62 selfloop flow, removed 18 redundant places. [2023-11-06 22:32:57,882 INFO L231 Difference]: Finished difference. Result has 252 places, 648 transitions, 15798 flow [2023-11-06 22:32:57,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=14071, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15798, PETRI_PLACES=252, PETRI_TRANSITIONS=648} [2023-11-06 22:32:57,883 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 231 predicate places. [2023-11-06 22:32:57,883 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 648 transitions, 15798 flow [2023-11-06 22:32:57,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 362.38461538461536) internal successors, (4711), 13 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:57,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:57,884 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:57,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:58,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:58,085 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:32:58,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash -712417973, now seen corresponding path program 18 times [2023-11-06 22:32:58,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:58,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821552717] [2023-11-06 22:32:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:58,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:32:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:58,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821552717] [2023-11-06 22:32:58,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821552717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:58,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262074221] [2023-11-06 22:32:58,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:32:58,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:58,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:58,225 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:58,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:32:58,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:32:58,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:58,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:32:58,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:32:58,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:58,652 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 155 treesize of output 107 [2023-11-06 22:32:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:32:58,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262074221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:58,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:58,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-06 22:32:58,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064841292] [2023-11-06 22:32:58,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:58,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:32:58,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:58,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:32:58,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:32:59,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 883 [2023-11-06 22:32:59,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 648 transitions, 15798 flow. Second operand has 14 states, 14 states have (on average 352.07142857142856) internal successors, (4929), 14 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:59,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:59,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 883 [2023-11-06 22:32:59,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:00,753 INFO L124 PetriNetUnfolderBase]: 1302/2050 cut-off events. [2023-11-06 22:33:00,753 INFO L125 PetriNetUnfolderBase]: For 28408/28408 co-relation queries the response was YES. [2023-11-06 22:33:00,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22696 conditions, 2050 events. 1302/2050 cut-off events. For 28408/28408 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 9881 event pairs, 16 based on Foata normal form. 258/2150 useless extension candidates. Maximal degree in co-relation 22636. Up to 788 conditions per place. [2023-11-06 22:33:00,787 INFO L140 encePairwiseOnDemand]: 873/883 looper letters, 403 selfloop transitions, 275 changer transitions 0/678 dead transitions. [2023-11-06 22:33:00,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 678 transitions, 16533 flow [2023-11-06 22:33:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:33:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:33:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 6761 transitions. [2023-11-06 22:33:00,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40299219169100553 [2023-11-06 22:33:00,796 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 6761 transitions. [2023-11-06 22:33:00,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 6761 transitions. [2023-11-06 22:33:00,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:00,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 6761 transitions. [2023-11-06 22:33:00,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 355.8421052631579) internal successors, (6761), 19 states have internal predecessors, (6761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:00,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 883.0) internal successors, (17660), 20 states have internal predecessors, (17660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:00,815 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 883.0) internal successors, (17660), 20 states have internal predecessors, (17660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:00,815 INFO L175 Difference]: Start difference. First operand has 252 places, 648 transitions, 15798 flow. Second operand 19 states and 6761 transitions. [2023-11-06 22:33:00,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 678 transitions, 16533 flow [2023-11-06 22:33:01,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 678 transitions, 16019 flow, removed 129 selfloop flow, removed 14 redundant places. [2023-11-06 22:33:01,172 INFO L231 Difference]: Finished difference. Result has 243 places, 589 transitions, 14126 flow [2023-11-06 22:33:01,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=11581, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=14126, PETRI_PLACES=243, PETRI_TRANSITIONS=589} [2023-11-06 22:33:01,174 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2023-11-06 22:33:01,174 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 589 transitions, 14126 flow [2023-11-06 22:33:01,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 352.07142857142856) internal successors, (4929), 14 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:01,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:01,175 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:01,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:01,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 22:33:01,376 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:33:01,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash -138875693, now seen corresponding path program 1 times [2023-11-06 22:33:01,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:01,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996579215] [2023-11-06 22:33:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:01,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:03,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:03,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996579215] [2023-11-06 22:33:03,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996579215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:03,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399039236] [2023-11-06 22:33:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:03,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:03,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:03,222 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:03,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df68c6f-b636-4647-9558-9e6479f2ff1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 22:33:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:03,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 22:33:03,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:04,239 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:33:04,240 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 86 [2023-11-06 22:33:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:04,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:07,066 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-06 22:33:07,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 394 treesize of output 167 [2023-11-06 22:33:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:33:09,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399039236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:09,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:09,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 33 [2023-11-06 22:33:09,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794567012] [2023-11-06 22:33:09,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:09,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:33:09,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:09,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:33:09,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:33:22,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 883 [2023-11-06 22:33:22,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 589 transitions, 14126 flow. Second operand has 34 states, 34 states have (on average 311.6470588235294) internal successors, (10596), 34 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:22,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:22,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 883 [2023-11-06 22:33:22,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand