./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-symm.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_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/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_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/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_c365cebb-38ce-4767-910b-5b7788e34d5d/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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:30:34,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:30:34,741 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:30:34,746 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:30:34,747 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:30:34,771 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:30:34,775 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:30:34,775 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:30:34,777 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:30:34,782 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:30:34,783 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:30:34,783 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:30:34,784 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:30:34,786 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:30:34,787 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:30:34,787 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:30:34,788 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:30:34,788 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:30:34,789 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:30:34,789 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:30:34,790 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:30:34,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:30:34,791 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:30:34,792 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:30:34,792 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:30:34,793 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:30:34,794 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:30:34,795 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:30:34,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:30:34,796 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:30:34,797 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:30:34,797 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:30:34,798 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:30:34,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:30:34,799 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:30:34,799 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:30:34,808 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:30:34,808 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:30:34,808 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:30:34,809 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_c365cebb-38ce-4767-910b-5b7788e34d5d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da [2023-11-06 22:30:35,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:30:35,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:30:35,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:30:35,167 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:30:35,168 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:30:35,169 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2023-11-06 22:30:38,310 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:30:38,547 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:30:38,548 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2023-11-06 22:30:38,559 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/data/35fd3135f/dd6773e300214b3bb69496b5ede37016/FLAGbcdf41c1f [2023-11-06 22:30:38,577 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/data/35fd3135f/dd6773e300214b3bb69496b5ede37016 [2023-11-06 22:30:38,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:30:38,586 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:30:38,592 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:30:38,592 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:30:38,597 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:30:38,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:38,600 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ed286bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38, skipping insertion in model container [2023-11-06 22:30:38,601 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:38,637 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:30:38,892 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_c365cebb-38ce-4767-910b-5b7788e34d5d/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2023-11-06 22:30:38,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:30:38,929 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:30:38,955 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_c365cebb-38ce-4767-910b-5b7788e34d5d/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2023-11-06 22:30:38,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:30:38,978 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:30:38,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38 WrapperNode [2023-11-06 22:30:38,978 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:30:38,979 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:30:38,979 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:30:38,980 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:30:38,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:38,996 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:39,037 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 203 [2023-11-06 22:30:39,040 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:30:39,041 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:30:39,041 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:30:39,041 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:30:39,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:39,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:39,060 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:39,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:39,085 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:39,090 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:39,097 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:39,106 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:39,110 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:30:39,111 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:30:39,111 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:30:39,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:30:39,113 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38" (1/1) ... [2023-11-06 22:30:39,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:30:39,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:39,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:30:39,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:30:39,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:30:39,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:30:39,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:30:39,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:30:39,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:30:39,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:30:39,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:30:39,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:30:39,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:30:39,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:30:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:30:39,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:30:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:30:39,212 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 22:30:39,381 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:30:39,383 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:30:39,834 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:30:39,845 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:30:39,845 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:30:39,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:39 BoogieIcfgContainer [2023-11-06 22:30:39,848 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:30:39,851 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:30:39,851 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:30:39,855 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:30:39,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:38" (1/3) ... [2023-11-06 22:30:39,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aed9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:39, skipping insertion in model container [2023-11-06 22:30:39,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:38" (2/3) ... [2023-11-06 22:30:39,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aed9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:39, skipping insertion in model container [2023-11-06 22:30:39,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:39" (3/3) ... [2023-11-06 22:30:39,859 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2023-11-06 22:30:39,868 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:30:39,880 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:30:39,881 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:30:39,881 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:30:39,987 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:30:40,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 260 transitions, 534 flow [2023-11-06 22:30:40,262 INFO L124 PetriNetUnfolderBase]: 21/258 cut-off events. [2023-11-06 22:30:40,265 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:30:40,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 258 events. 21/258 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 350 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 167. Up to 3 conditions per place. [2023-11-06 22:30:40,275 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 260 transitions, 534 flow [2023-11-06 22:30:40,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 249 transitions, 510 flow [2023-11-06 22:30:40,286 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:30:40,296 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 235 places, 249 transitions, 510 flow [2023-11-06 22:30:40,299 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 235 places, 249 transitions, 510 flow [2023-11-06 22:30:40,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 249 transitions, 510 flow [2023-11-06 22:30:40,360 INFO L124 PetriNetUnfolderBase]: 21/249 cut-off events. [2023-11-06 22:30:40,361 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:30:40,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 249 events. 21/249 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 347 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 167. Up to 3 conditions per place. [2023-11-06 22:30:40,369 INFO L119 LiptonReduction]: Number of co-enabled transitions 6500 [2023-11-06 22:30:48,697 INFO L134 LiptonReduction]: Checked pairs total: 6530 [2023-11-06 22:30:48,697 INFO L136 LiptonReduction]: Total number of compositions: 287 [2023-11-06 22:30:48,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:30:48,721 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;@7f3f4977, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:30:48,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:30:48,731 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:30:48,731 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2023-11-06 22:30:48,731 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:30:48,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:48,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:48,733 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 22:30:48,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:48,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1859502843, now seen corresponding path program 1 times [2023-11-06 22:30:48,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:48,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397574835] [2023-11-06 22:30:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:48,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:49,768 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 22:30:49,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:49,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397574835] [2023-11-06 22:30:49,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397574835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:49,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:49,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:30:49,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413707394] [2023-11-06 22:30:49,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:49,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:30:49,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:49,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:30:49,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:30:50,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 547 [2023-11-06 22:30:50,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 8 states, 8 states have (on average 215.875) internal successors, (1727), 8 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:50,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:50,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 547 [2023-11-06 22:30:50,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:50,502 INFO L124 PetriNetUnfolderBase]: 156/289 cut-off events. [2023-11-06 22:30:50,502 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-06 22:30:50,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 289 events. 156/289 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1005 event pairs, 35 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 256. Up to 134 conditions per place. [2023-11-06 22:30:50,506 INFO L140 encePairwiseOnDemand]: 537/547 looper letters, 52 selfloop transitions, 11 changer transitions 7/70 dead transitions. [2023-11-06 22:30:50,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 70 transitions, 322 flow [2023-11-06 22:30:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:30:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:30:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1999 transitions. [2023-11-06 22:30:50,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40605321958155594 [2023-11-06 22:30:50,532 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1999 transitions. [2023-11-06 22:30:50,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1999 transitions. [2023-11-06 22:30:50,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:50,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1999 transitions. [2023-11-06 22:30:50,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 222.11111111111111) internal successors, (1999), 9 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:50,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 547.0) internal successors, (5470), 10 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:50,570 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 547.0) internal successors, (5470), 10 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:50,572 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 9 states and 1999 transitions. [2023-11-06 22:30:50,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 70 transitions, 322 flow [2023-11-06 22:30:50,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 70 transitions, 294 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:30:50,580 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 126 flow [2023-11-06 22:30:50,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=126, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-11-06 22:30:50,586 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2023-11-06 22:30:50,586 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 126 flow [2023-11-06 22:30:50,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 215.875) internal successors, (1727), 8 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:50,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:50,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:50,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:30:50,589 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 22:30:50,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1940073908, now seen corresponding path program 1 times [2023-11-06 22:30:50,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:50,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138431751] [2023-11-06 22:30:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:50,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:50,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:50,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138431751] [2023-11-06 22:30:50,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138431751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:50,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585927887] [2023-11-06 22:30:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:50,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:50,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:50,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:50,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:30:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:51,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:30:51,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:51,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:51,502 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:51,503 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 145 treesize of output 125 [2023-11-06 22:30:51,791 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 22:30:51,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585927887] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:51,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:30:51,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-11-06 22:30:51,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675038740] [2023-11-06 22:30:51,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:51,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:30:51,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:51,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:30:51,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:30:52,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 547 [2023-11-06 22:30:52,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 126 flow. Second operand has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:52,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:52,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 547 [2023-11-06 22:30:52,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:52,376 INFO L124 PetriNetUnfolderBase]: 272/504 cut-off events. [2023-11-06 22:30:52,377 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2023-11-06 22:30:52,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 504 events. 272/504 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2084 event pairs, 116 based on Foata normal form. 13/458 useless extension candidates. Maximal degree in co-relation 1051. Up to 145 conditions per place. [2023-11-06 22:30:52,382 INFO L140 encePairwiseOnDemand]: 537/547 looper letters, 76 selfloop transitions, 10 changer transitions 5/91 dead transitions. [2023-11-06 22:30:52,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 91 transitions, 473 flow [2023-11-06 22:30:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:30:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:30:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1557 transitions. [2023-11-06 22:30:52,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40663358579263514 [2023-11-06 22:30:52,390 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1557 transitions. [2023-11-06 22:30:52,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1557 transitions. [2023-11-06 22:30:52,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:52,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1557 transitions. [2023-11-06 22:30:52,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 222.42857142857142) internal successors, (1557), 7 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:52,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 547.0) internal successors, (4376), 8 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:52,410 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 547.0) internal successors, (4376), 8 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:52,410 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 126 flow. Second operand 7 states and 1557 transitions. [2023-11-06 22:30:52,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 91 transitions, 473 flow [2023-11-06 22:30:52,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 91 transitions, 469 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-06 22:30:52,415 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 186 flow [2023-11-06 22:30:52,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-06 22:30:52,417 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 18 predicate places. [2023-11-06 22:30:52,417 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 186 flow [2023-11-06 22:30:52,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:52,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:52,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:52,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:52,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:52,631 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 22:30:52,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:52,631 INFO L85 PathProgramCache]: Analyzing trace with hash 549386088, now seen corresponding path program 2 times [2023-11-06 22:30:52,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:52,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533301892] [2023-11-06 22:30:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:52,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:52,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:52,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533301892] [2023-11-06 22:30:52,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533301892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:52,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647197576] [2023-11-06 22:30:52,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:30:52,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:52,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:52,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:52,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:30:53,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:30:53,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:53,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:30:53,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:53,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:53,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647197576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:53,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:30:53,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-06 22:30:53,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943855830] [2023-11-06 22:30:53,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:53,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:30:53,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:53,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:30:53,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:30:53,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 547 [2023-11-06 22:30:53,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 186 flow. Second operand has 7 states, 7 states have (on average 219.28571428571428) internal successors, (1535), 7 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:53,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:53,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 547 [2023-11-06 22:30:53,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:53,768 INFO L124 PetriNetUnfolderBase]: 280/536 cut-off events. [2023-11-06 22:30:53,768 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2023-11-06 22:30:53,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 536 events. 280/536 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2390 event pairs, 28 based on Foata normal form. 19/488 useless extension candidates. Maximal degree in co-relation 1251. Up to 178 conditions per place. [2023-11-06 22:30:53,774 INFO L140 encePairwiseOnDemand]: 537/547 looper letters, 60 selfloop transitions, 19 changer transitions 6/85 dead transitions. [2023-11-06 22:30:53,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 85 transitions, 495 flow [2023-11-06 22:30:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:30:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:30:53,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2032 transitions. [2023-11-06 22:30:53,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127564493195206 [2023-11-06 22:30:53,786 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2032 transitions. [2023-11-06 22:30:53,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2032 transitions. [2023-11-06 22:30:53,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:53,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2032 transitions. [2023-11-06 22:30:53,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.77777777777777) internal successors, (2032), 9 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:53,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 547.0) internal successors, (5470), 10 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:53,810 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 547.0) internal successors, (5470), 10 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:53,811 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 186 flow. Second operand 9 states and 2032 transitions. [2023-11-06 22:30:53,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 85 transitions, 495 flow [2023-11-06 22:30:53,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 85 transitions, 480 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 22:30:53,821 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 285 flow [2023-11-06 22:30:53,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=285, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2023-11-06 22:30:53,823 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2023-11-06 22:30:53,824 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 285 flow [2023-11-06 22:30:53,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 219.28571428571428) internal successors, (1535), 7 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:53,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:53,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:53,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:54,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:54,037 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 22:30:54,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:54,037 INFO L85 PathProgramCache]: Analyzing trace with hash -231379128, now seen corresponding path program 1 times [2023-11-06 22:30:54,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:54,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555542448] [2023-11-06 22:30:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:54,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:54,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:54,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555542448] [2023-11-06 22:30:54,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555542448] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:54,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752161992] [2023-11-06 22:30:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:54,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:54,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:54,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:54,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:30:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:54,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:30:54,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:54,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:54,791 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:54,792 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 145 treesize of output 125 [2023-11-06 22:30:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:55,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752161992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:55,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:30:55,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-06 22:30:55,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383730436] [2023-11-06 22:30:55,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:55,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:30:55,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:55,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:30:55,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:30:56,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 547 [2023-11-06 22:30:56,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 285 flow. Second operand has 20 states, 20 states have (on average 211.9) internal successors, (4238), 20 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:56,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 547 [2023-11-06 22:30:56,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:56,888 INFO L124 PetriNetUnfolderBase]: 513/968 cut-off events. [2023-11-06 22:30:56,888 INFO L125 PetriNetUnfolderBase]: For 1931/1931 co-relation queries the response was YES. [2023-11-06 22:30:56,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2844 conditions, 968 events. 513/968 cut-off events. For 1931/1931 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4920 event pairs, 221 based on Foata normal form. 26/876 useless extension candidates. Maximal degree in co-relation 2387. Up to 394 conditions per place. [2023-11-06 22:30:56,897 INFO L140 encePairwiseOnDemand]: 537/547 looper letters, 120 selfloop transitions, 20 changer transitions 9/149 dead transitions. [2023-11-06 22:30:56,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 149 transitions, 975 flow [2023-11-06 22:30:56,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:30:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:30:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3072 transitions. [2023-11-06 22:30:56,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011491250979368 [2023-11-06 22:30:56,916 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3072 transitions. [2023-11-06 22:30:56,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3072 transitions. [2023-11-06 22:30:56,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:56,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3072 transitions. [2023-11-06 22:30:56,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 219.42857142857142) internal successors, (3072), 14 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 547.0) internal successors, (8205), 15 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,946 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 547.0) internal successors, (8205), 15 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,947 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 285 flow. Second operand 14 states and 3072 transitions. [2023-11-06 22:30:56,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 149 transitions, 975 flow [2023-11-06 22:30:56,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 149 transitions, 934 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-11-06 22:30:56,964 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 439 flow [2023-11-06 22:30:56,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=439, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2023-11-06 22:30:56,967 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 44 predicate places. [2023-11-06 22:30:56,967 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 439 flow [2023-11-06 22:30:56,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 211.9) internal successors, (4238), 20 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:56,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:56,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:56,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:57,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:57,177 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 22:30:57,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1100823736, now seen corresponding path program 2 times [2023-11-06 22:30:57,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:57,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063217521] [2023-11-06 22:30:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:57,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:57,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:57,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063217521] [2023-11-06 22:30:57,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063217521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:57,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251070826] [2023-11-06 22:30:57,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:30:57,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:57,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:57,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:30:57,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:30:57,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:57,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:30:57,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:57,785 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:57,786 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 93 treesize of output 74 [2023-11-06 22:30:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:57,854 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:30:57,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251070826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:57,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:30:57,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-11-06 22:30:57,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817318625] [2023-11-06 22:30:57,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:57,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:30:57,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:57,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:30:57,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:30:58,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 547 [2023-11-06 22:30:58,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 439 flow. Second operand has 8 states, 8 states have (on average 217.0) internal successors, (1736), 8 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:58,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:58,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 547 [2023-11-06 22:30:58,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:58,502 INFO L124 PetriNetUnfolderBase]: 477/930 cut-off events. [2023-11-06 22:30:58,502 INFO L125 PetriNetUnfolderBase]: For 2332/2332 co-relation queries the response was YES. [2023-11-06 22:30:58,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2760 conditions, 930 events. 477/930 cut-off events. For 2332/2332 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4877 event pairs, 66 based on Foata normal form. 38/852 useless extension candidates. Maximal degree in co-relation 2386. Up to 323 conditions per place. [2023-11-06 22:30:58,510 INFO L140 encePairwiseOnDemand]: 538/547 looper letters, 67 selfloop transitions, 30 changer transitions 6/103 dead transitions. [2023-11-06 22:30:58,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 103 transitions, 777 flow [2023-11-06 22:30:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:30:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:30:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2010 transitions. [2023-11-06 22:30:58,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082876294942108 [2023-11-06 22:30:58,519 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2010 transitions. [2023-11-06 22:30:58,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2010 transitions. [2023-11-06 22:30:58,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:58,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2010 transitions. [2023-11-06 22:30:58,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 223.33333333333334) internal successors, (2010), 9 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:58,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 547.0) internal successors, (5470), 10 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:58,538 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 547.0) internal successors, (5470), 10 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:58,538 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 439 flow. Second operand 9 states and 2010 transitions. [2023-11-06 22:30:58,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 103 transitions, 777 flow [2023-11-06 22:30:58,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 103 transitions, 714 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-11-06 22:30:58,552 INFO L231 Difference]: Finished difference. Result has 77 places, 65 transitions, 512 flow [2023-11-06 22:30:58,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=512, PETRI_PLACES=77, PETRI_TRANSITIONS=65} [2023-11-06 22:30:58,553 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 52 predicate places. [2023-11-06 22:30:58,554 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 65 transitions, 512 flow [2023-11-06 22:30:58,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 217.0) internal successors, (1736), 8 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:58,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:58,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:58,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:58,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:58,761 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 22:30:58,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:58,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1861377211, now seen corresponding path program 1 times [2023-11-06 22:30:58,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:58,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44365922] [2023-11-06 22:30:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:58,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:58,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:58,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44365922] [2023-11-06 22:30:58,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44365922] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:58,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98968952] [2023-11-06 22:30:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:58,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:30:58,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:58,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:30:59,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:30:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:59,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:30:59,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:59,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:59,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98968952] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:30:59,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:30:59,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-06 22:30:59,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511402904] [2023-11-06 22:30:59,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:59,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:30:59,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:59,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:30:59,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:30:59,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 547 [2023-11-06 22:30:59,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 512 flow. Second operand has 7 states, 7 states have (on average 218.42857142857142) internal successors, (1529), 7 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:59,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:59,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 547 [2023-11-06 22:30:59,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:59,853 INFO L124 PetriNetUnfolderBase]: 497/974 cut-off events. [2023-11-06 22:30:59,853 INFO L125 PetriNetUnfolderBase]: For 2763/2763 co-relation queries the response was YES. [2023-11-06 22:30:59,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3039 conditions, 974 events. 497/974 cut-off events. For 2763/2763 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5171 event pairs, 156 based on Foata normal form. 0/860 useless extension candidates. Maximal degree in co-relation 2562. Up to 216 conditions per place. [2023-11-06 22:30:59,863 INFO L140 encePairwiseOnDemand]: 538/547 looper letters, 99 selfloop transitions, 17 changer transitions 8/124 dead transitions. [2023-11-06 22:30:59,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 124 transitions, 1006 flow [2023-11-06 22:30:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:30:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:30:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2035 transitions. [2023-11-06 22:30:59,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4133658338411538 [2023-11-06 22:30:59,873 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2035 transitions. [2023-11-06 22:30:59,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2035 transitions. [2023-11-06 22:30:59,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:59,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2035 transitions. [2023-11-06 22:30:59,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 226.11111111111111) internal successors, (2035), 9 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:59,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 547.0) internal successors, (5470), 10 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:59,902 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 547.0) internal successors, (5470), 10 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:59,902 INFO L175 Difference]: Start difference. First operand has 77 places, 65 transitions, 512 flow. Second operand 9 states and 2035 transitions. [2023-11-06 22:30:59,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 124 transitions, 1006 flow [2023-11-06 22:30:59,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 124 transitions, 984 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 22:30:59,916 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 542 flow [2023-11-06 22:30:59,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=542, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2023-11-06 22:30:59,919 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 58 predicate places. [2023-11-06 22:30:59,920 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 542 flow [2023-11-06 22:30:59,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 218.42857142857142) internal successors, (1529), 7 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:59,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:59,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:59,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:00,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:31:00,127 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 22:31:00,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1657515560, now seen corresponding path program 1 times [2023-11-06 22:31:00,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:00,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614593843] [2023-11-06 22:31:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:00,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:00,246 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 22:31:00,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:00,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614593843] [2023-11-06 22:31:00,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614593843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:00,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:00,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:31:00,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248863169] [2023-11-06 22:31:00,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:00,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:31:00,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:31:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:31:00,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 547 [2023-11-06 22:31:00,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 542 flow. Second operand has 5 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:00,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:00,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 547 [2023-11-06 22:31:00,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:00,584 INFO L124 PetriNetUnfolderBase]: 361/734 cut-off events. [2023-11-06 22:31:00,584 INFO L125 PetriNetUnfolderBase]: For 2374/2374 co-relation queries the response was YES. [2023-11-06 22:31:00,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2499 conditions, 734 events. 361/734 cut-off events. For 2374/2374 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3717 event pairs, 245 based on Foata normal form. 24/756 useless extension candidates. Maximal degree in co-relation 2164. Up to 581 conditions per place. [2023-11-06 22:31:00,591 INFO L140 encePairwiseOnDemand]: 541/547 looper letters, 47 selfloop transitions, 2 changer transitions 26/75 dead transitions. [2023-11-06 22:31:00,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 666 flow [2023-11-06 22:31:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:31:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:31:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1358 transitions. [2023-11-06 22:31:00,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137720901889092 [2023-11-06 22:31:00,597 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1358 transitions. [2023-11-06 22:31:00,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1358 transitions. [2023-11-06 22:31:00,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:00,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1358 transitions. [2023-11-06 22:31:00,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 226.33333333333334) internal successors, (1358), 6 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:00,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 547.0) internal successors, (3829), 7 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:00,609 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 547.0) internal successors, (3829), 7 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:00,609 INFO L175 Difference]: Start difference. First operand has 83 places, 70 transitions, 542 flow. Second operand 6 states and 1358 transitions. [2023-11-06 22:31:00,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 666 flow [2023-11-06 22:31:00,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 651 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 22:31:00,619 INFO L231 Difference]: Finished difference. Result has 83 places, 49 transitions, 351 flow [2023-11-06 22:31:00,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=83, PETRI_TRANSITIONS=49} [2023-11-06 22:31:00,620 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 58 predicate places. [2023-11-06 22:31:00,621 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 49 transitions, 351 flow [2023-11-06 22:31:00,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:00,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:00,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:00,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:31:00,622 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 22:31:00,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:00,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1721405435, now seen corresponding path program 1 times [2023-11-06 22:31:00,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:00,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762192006] [2023-11-06 22:31:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:00,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:01,246 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 22:31:01,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:01,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762192006] [2023-11-06 22:31:01,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762192006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:01,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923707655] [2023-11-06 22:31:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:01,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:01,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:01,248 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:01,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:31:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:01,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:31:01,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:01,536 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 22:31:01,624 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 22:31:01,682 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 22:31:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:01,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:02,365 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:02,366 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 48 treesize of output 37 [2023-11-06 22:31:02,384 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:02,385 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 598 treesize of output 546 [2023-11-06 22:31:02,416 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:02,416 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-11-06 22:31:02,436 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:02,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-11-06 22:31:02,641 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:02,642 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 48 treesize of output 37 [2023-11-06 22:31:02,655 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:02,655 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 294 treesize of output 274 [2023-11-06 22:31:02,674 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:02,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-11-06 22:31:02,693 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:02,694 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-11-06 22:31:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:03,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923707655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:03,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:03,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2023-11-06 22:31:03,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131117371] [2023-11-06 22:31:03,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:03,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:31:03,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:31:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=499, Unknown=12, NotChecked=0, Total=650 [2023-11-06 22:31:05,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 547 [2023-11-06 22:31:05,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 49 transitions, 351 flow. Second operand has 26 states, 26 states have (on average 162.57692307692307) internal successors, (4227), 26 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:05,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:05,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 547 [2023-11-06 22:31:05,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:06,717 INFO L124 PetriNetUnfolderBase]: 507/944 cut-off events. [2023-11-06 22:31:06,718 INFO L125 PetriNetUnfolderBase]: For 4373/4373 co-relation queries the response was YES. [2023-11-06 22:31:06,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3489 conditions, 944 events. 507/944 cut-off events. For 4373/4373 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4659 event pairs, 196 based on Foata normal form. 16/960 useless extension candidates. Maximal degree in co-relation 3451. Up to 372 conditions per place. [2023-11-06 22:31:06,728 INFO L140 encePairwiseOnDemand]: 533/547 looper letters, 102 selfloop transitions, 26 changer transitions 1/129 dead transitions. [2023-11-06 22:31:06,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 1028 flow [2023-11-06 22:31:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:31:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:31:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2527 transitions. [2023-11-06 22:31:06,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30798293723339426 [2023-11-06 22:31:06,740 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2527 transitions. [2023-11-06 22:31:06,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2527 transitions. [2023-11-06 22:31:06,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:06,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2527 transitions. [2023-11-06 22:31:06,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 168.46666666666667) internal successors, (2527), 15 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:06,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 547.0) internal successors, (8752), 16 states have internal predecessors, (8752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:06,767 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 547.0) internal successors, (8752), 16 states have internal predecessors, (8752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:06,767 INFO L175 Difference]: Start difference. First operand has 83 places, 49 transitions, 351 flow. Second operand 15 states and 2527 transitions. [2023-11-06 22:31:06,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 1028 flow [2023-11-06 22:31:06,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 129 transitions, 894 flow, removed 59 selfloop flow, removed 12 redundant places. [2023-11-06 22:31:06,782 INFO L231 Difference]: Finished difference. Result has 81 places, 63 transitions, 472 flow [2023-11-06 22:31:06,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=472, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2023-11-06 22:31:06,786 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 56 predicate places. [2023-11-06 22:31:06,786 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 472 flow [2023-11-06 22:31:06,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 162.57692307692307) internal successors, (4227), 26 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:06,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:06,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:06,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:06,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:31:06,994 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 22:31:06,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:06,994 INFO L85 PathProgramCache]: Analyzing trace with hash 157895891, now seen corresponding path program 2 times [2023-11-06 22:31:06,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:06,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847433947] [2023-11-06 22:31:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:06,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:07,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:07,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847433947] [2023-11-06 22:31:07,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847433947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:07,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524538163] [2023-11-06 22:31:07,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:31:07,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:07,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:07,644 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:07,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:31:07,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:31:07,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:07,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:31:07,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:08,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:08,188 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-06 22:31:08,188 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 94 treesize of output 95 [2023-11-06 22:31:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:08,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524538163] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:08,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:08,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 23 [2023-11-06 22:31:08,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994221476] [2023-11-06 22:31:08,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:08,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:31:08,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:08,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:31:08,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:31:09,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 547 [2023-11-06 22:31:09,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 472 flow. Second operand has 10 states, 10 states have (on average 204.9) internal successors, (2049), 10 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:09,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:09,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 547 [2023-11-06 22:31:09,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:09,674 INFO L124 PetriNetUnfolderBase]: 564/1041 cut-off events. [2023-11-06 22:31:09,675 INFO L125 PetriNetUnfolderBase]: For 3697/3697 co-relation queries the response was YES. [2023-11-06 22:31:09,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4270 conditions, 1041 events. 564/1041 cut-off events. For 3697/3697 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5221 event pairs, 233 based on Foata normal form. 2/1043 useless extension candidates. Maximal degree in co-relation 3588. Up to 375 conditions per place. [2023-11-06 22:31:09,686 INFO L140 encePairwiseOnDemand]: 533/547 looper letters, 95 selfloop transitions, 44 changer transitions 1/140 dead transitions. [2023-11-06 22:31:09,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 140 transitions, 1233 flow [2023-11-06 22:31:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:31:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:31:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2948 transitions. [2023-11-06 22:31:09,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38495690780882735 [2023-11-06 22:31:09,699 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2948 transitions. [2023-11-06 22:31:09,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2948 transitions. [2023-11-06 22:31:09,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:09,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2948 transitions. [2023-11-06 22:31:09,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 210.57142857142858) internal successors, (2948), 14 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:09,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 547.0) internal successors, (8205), 15 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:09,758 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 547.0) internal successors, (8205), 15 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:09,759 INFO L175 Difference]: Start difference. First operand has 81 places, 63 transitions, 472 flow. Second operand 14 states and 2948 transitions. [2023-11-06 22:31:09,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 140 transitions, 1233 flow [2023-11-06 22:31:09,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 140 transitions, 1183 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-11-06 22:31:09,778 INFO L231 Difference]: Finished difference. Result has 96 places, 87 transitions, 787 flow [2023-11-06 22:31:09,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=787, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2023-11-06 22:31:09,780 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 71 predicate places. [2023-11-06 22:31:09,780 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 787 flow [2023-11-06 22:31:09,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 204.9) internal successors, (2049), 10 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:09,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:09,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:09,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:09,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:31:09,988 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 22:31:09,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1159675841, now seen corresponding path program 3 times [2023-11-06 22:31:09,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:09,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551905914] [2023-11-06 22:31:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:09,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:10,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:10,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551905914] [2023-11-06 22:31:10,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551905914] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:10,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596926591] [2023-11-06 22:31:10,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:31:10,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:10,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:10,680 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:10,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:31:10,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:31:10,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:10,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:31:10,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:11,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:11,393 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-06 22:31:11,394 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 58 treesize of output 58 [2023-11-06 22:31:11,425 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 22:31:11,425 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 12 treesize of output 4 [2023-11-06 22:31:11,432 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 22:31:11,433 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 12 treesize of output 4 [2023-11-06 22:31:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:11,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596926591] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:11,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:11,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2023-11-06 22:31:11,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727753936] [2023-11-06 22:31:11,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:11,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:31:11,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:11,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:31:11,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:31:12,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 547 [2023-11-06 22:31:12,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 787 flow. Second operand has 10 states, 10 states have (on average 204.9) internal successors, (2049), 10 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:12,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:12,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 547 [2023-11-06 22:31:12,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:13,245 INFO L124 PetriNetUnfolderBase]: 608/1129 cut-off events. [2023-11-06 22:31:13,245 INFO L125 PetriNetUnfolderBase]: For 6322/6322 co-relation queries the response was YES. [2023-11-06 22:31:13,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5393 conditions, 1129 events. 608/1129 cut-off events. For 6322/6322 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5770 event pairs, 291 based on Foata normal form. 16/1145 useless extension candidates. Maximal degree in co-relation 4494. Up to 423 conditions per place. [2023-11-06 22:31:13,260 INFO L140 encePairwiseOnDemand]: 534/547 looper letters, 109 selfloop transitions, 32 changer transitions 1/142 dead transitions. [2023-11-06 22:31:13,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 1503 flow [2023-11-06 22:31:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:31:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:31:13,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2116 transitions. [2023-11-06 22:31:13,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38683729433272396 [2023-11-06 22:31:13,269 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2116 transitions. [2023-11-06 22:31:13,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2116 transitions. [2023-11-06 22:31:13,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:13,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2116 transitions. [2023-11-06 22:31:13,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 211.6) internal successors, (2116), 10 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:13,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:13,288 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:13,288 INFO L175 Difference]: Start difference. First operand has 96 places, 87 transitions, 787 flow. Second operand 10 states and 2116 transitions. [2023-11-06 22:31:13,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 1503 flow [2023-11-06 22:31:13,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1314 flow, removed 82 selfloop flow, removed 6 redundant places. [2023-11-06 22:31:13,318 INFO L231 Difference]: Finished difference. Result has 102 places, 96 transitions, 874 flow [2023-11-06 22:31:13,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=874, PETRI_PLACES=102, PETRI_TRANSITIONS=96} [2023-11-06 22:31:13,319 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 77 predicate places. [2023-11-06 22:31:13,319 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 96 transitions, 874 flow [2023-11-06 22:31:13,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 204.9) internal successors, (2049), 10 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:13,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:13,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:13,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 22:31:13,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:13,527 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 22:31:13,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:13,527 INFO L85 PathProgramCache]: Analyzing trace with hash -435510461, now seen corresponding path program 4 times [2023-11-06 22:31:13,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:13,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695239196] [2023-11-06 22:31:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:13,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:14,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:14,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695239196] [2023-11-06 22:31:14,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695239196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:14,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092405004] [2023-11-06 22:31:14,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:31:14,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:14,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:14,129 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:14,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:31:14,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:31:14,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:14,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:31:14,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:14,347 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 22:31:14,381 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 22:31:14,411 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 22:31:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:14,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:31:14,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092405004] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:14,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:14,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 22 [2023-11-06 22:31:14,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502799772] [2023-11-06 22:31:14,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:14,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:31:14,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:14,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:31:14,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:31:15,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 547 [2023-11-06 22:31:15,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 96 transitions, 874 flow. Second operand has 6 states, 6 states have (on average 223.16666666666666) internal successors, (1339), 6 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:15,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:15,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 547 [2023-11-06 22:31:15,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:16,331 INFO L124 PetriNetUnfolderBase]: 1057/2035 cut-off events. [2023-11-06 22:31:16,331 INFO L125 PetriNetUnfolderBase]: For 10348/10348 co-relation queries the response was YES. [2023-11-06 22:31:16,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9204 conditions, 2035 events. 1057/2035 cut-off events. For 10348/10348 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12725 event pairs, 243 based on Foata normal form. 48/2083 useless extension candidates. Maximal degree in co-relation 8651. Up to 1150 conditions per place. [2023-11-06 22:31:16,352 INFO L140 encePairwiseOnDemand]: 537/547 looper letters, 135 selfloop transitions, 86 changer transitions 2/223 dead transitions. [2023-11-06 22:31:16,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 223 transitions, 2315 flow [2023-11-06 22:31:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:31:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:31:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1845 transitions. [2023-11-06 22:31:16,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421617915904936 [2023-11-06 22:31:16,357 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1845 transitions. [2023-11-06 22:31:16,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1845 transitions. [2023-11-06 22:31:16,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:16,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1845 transitions. [2023-11-06 22:31:16,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 230.625) internal successors, (1845), 8 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:16,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 547.0) internal successors, (4923), 9 states have internal predecessors, (4923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:16,370 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 547.0) internal successors, (4923), 9 states have internal predecessors, (4923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:16,371 INFO L175 Difference]: Start difference. First operand has 102 places, 96 transitions, 874 flow. Second operand 8 states and 1845 transitions. [2023-11-06 22:31:16,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 223 transitions, 2315 flow [2023-11-06 22:31:16,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 223 transitions, 2201 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-11-06 22:31:16,426 INFO L231 Difference]: Finished difference. Result has 109 places, 168 transitions, 1894 flow [2023-11-06 22:31:16,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1894, PETRI_PLACES=109, PETRI_TRANSITIONS=168} [2023-11-06 22:31:16,427 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 84 predicate places. [2023-11-06 22:31:16,427 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 168 transitions, 1894 flow [2023-11-06 22:31:16,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 223.16666666666666) internal successors, (1339), 6 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:16,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:16,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:16,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:16,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:31:16,634 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 22:31:16,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:16,634 INFO L85 PathProgramCache]: Analyzing trace with hash 884354743, now seen corresponding path program 5 times [2023-11-06 22:31:16,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:16,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207152870] [2023-11-06 22:31:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:16,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:17,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:17,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207152870] [2023-11-06 22:31:17,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207152870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:17,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528944916] [2023-11-06 22:31:17,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:31:17,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:17,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:17,177 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:17,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:31:17,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:31:17,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:17,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:31:17,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:17,402 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 22:31:17,456 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 22:31:17,495 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 22:31:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:17,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:31:17,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528944916] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:17,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:17,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 22 [2023-11-06 22:31:17,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594327454] [2023-11-06 22:31:17,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:17,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:31:17,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:17,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:31:17,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:31:18,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 547 [2023-11-06 22:31:18,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 168 transitions, 1894 flow. Second operand has 6 states, 6 states have (on average 223.16666666666666) internal successors, (1339), 6 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:18,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:18,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 547 [2023-11-06 22:31:18,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:19,165 INFO L124 PetriNetUnfolderBase]: 1177/2303 cut-off events. [2023-11-06 22:31:19,166 INFO L125 PetriNetUnfolderBase]: For 14964/14964 co-relation queries the response was YES. [2023-11-06 22:31:19,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11791 conditions, 2303 events. 1177/2303 cut-off events. For 14964/14964 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15061 event pairs, 286 based on Foata normal form. 6/2309 useless extension candidates. Maximal degree in co-relation 11154. Up to 1189 conditions per place. [2023-11-06 22:31:19,191 INFO L140 encePairwiseOnDemand]: 538/547 looper letters, 147 selfloop transitions, 95 changer transitions 5/247 dead transitions. [2023-11-06 22:31:19,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 247 transitions, 3049 flow [2023-11-06 22:31:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:31:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:31:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2069 transitions. [2023-11-06 22:31:19,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4202721917529961 [2023-11-06 22:31:19,196 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2069 transitions. [2023-11-06 22:31:19,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2069 transitions. [2023-11-06 22:31:19,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:19,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2069 transitions. [2023-11-06 22:31:19,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 229.88888888888889) internal successors, (2069), 9 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:19,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 547.0) internal successors, (5470), 10 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:19,211 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 547.0) internal successors, (5470), 10 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:19,211 INFO L175 Difference]: Start difference. First operand has 109 places, 168 transitions, 1894 flow. Second operand 9 states and 2069 transitions. [2023-11-06 22:31:19,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 247 transitions, 3049 flow [2023-11-06 22:31:19,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 247 transitions, 3001 flow, removed 24 selfloop flow, removed 0 redundant places. [2023-11-06 22:31:19,312 INFO L231 Difference]: Finished difference. Result has 122 places, 192 transitions, 2393 flow [2023-11-06 22:31:19,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2393, PETRI_PLACES=122, PETRI_TRANSITIONS=192} [2023-11-06 22:31:19,313 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 97 predicate places. [2023-11-06 22:31:19,313 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 192 transitions, 2393 flow [2023-11-06 22:31:19,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 223.16666666666666) internal successors, (1339), 6 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:19,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:19,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:19,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:19,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:31:19,520 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 22:31:19,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2027073975, now seen corresponding path program 6 times [2023-11-06 22:31:19,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:19,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845376523] [2023-11-06 22:31:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:19,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:20,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:20,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845376523] [2023-11-06 22:31:20,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845376523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:20,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063489575] [2023-11-06 22:31:20,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:31:20,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:20,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:20,037 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:20,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:31:20,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:31:20,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:20,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:31:20,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:20,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:20,565 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 22:31:20,566 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 20 treesize of output 4 [2023-11-06 22:31:20,617 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-06 22:31:20,618 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 82 treesize of output 66 [2023-11-06 22:31:20,651 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 22:31:20,651 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 20 treesize of output 4 [2023-11-06 22:31:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:20,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063489575] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:20,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:20,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-11-06 22:31:20,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559166672] [2023-11-06 22:31:20,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:20,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:31:20,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:20,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:31:20,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:31:21,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 547 [2023-11-06 22:31:21,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 192 transitions, 2393 flow. Second operand has 10 states, 10 states have (on average 204.9) internal successors, (2049), 10 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:21,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:21,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 547 [2023-11-06 22:31:21,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:22,330 INFO L124 PetriNetUnfolderBase]: 1165/2263 cut-off events. [2023-11-06 22:31:22,330 INFO L125 PetriNetUnfolderBase]: For 19614/19614 co-relation queries the response was YES. [2023-11-06 22:31:22,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12959 conditions, 2263 events. 1165/2263 cut-off events. For 19614/19614 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14664 event pairs, 456 based on Foata normal form. 4/2267 useless extension candidates. Maximal degree in co-relation 12276. Up to 991 conditions per place. [2023-11-06 22:31:22,357 INFO L140 encePairwiseOnDemand]: 533/547 looper letters, 143 selfloop transitions, 106 changer transitions 1/250 dead transitions. [2023-11-06 22:31:22,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 250 transitions, 3397 flow [2023-11-06 22:31:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:31:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:31:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2947 transitions. [2023-11-06 22:31:22,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482632541133455 [2023-11-06 22:31:22,364 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2947 transitions. [2023-11-06 22:31:22,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2947 transitions. [2023-11-06 22:31:22,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:22,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2947 transitions. [2023-11-06 22:31:22,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 210.5) internal successors, (2947), 14 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:22,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 547.0) internal successors, (8205), 15 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:22,380 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 547.0) internal successors, (8205), 15 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:22,380 INFO L175 Difference]: Start difference. First operand has 122 places, 192 transitions, 2393 flow. Second operand 14 states and 2947 transitions. [2023-11-06 22:31:22,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 250 transitions, 3397 flow [2023-11-06 22:31:22,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 250 transitions, 3321 flow, removed 38 selfloop flow, removed 0 redundant places. [2023-11-06 22:31:22,510 INFO L231 Difference]: Finished difference. Result has 137 places, 196 transitions, 2621 flow [2023-11-06 22:31:22,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2621, PETRI_PLACES=137, PETRI_TRANSITIONS=196} [2023-11-06 22:31:22,511 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 112 predicate places. [2023-11-06 22:31:22,512 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 196 transitions, 2621 flow [2023-11-06 22:31:22,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 204.9) internal successors, (2049), 10 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:22,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:22,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:22,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:22,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:31:22,718 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 22:31:22,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:22,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1891869561, now seen corresponding path program 7 times [2023-11-06 22:31:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:22,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941699065] [2023-11-06 22:31:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:22,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:23,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:23,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941699065] [2023-11-06 22:31:23,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941699065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:23,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429413428] [2023-11-06 22:31:23,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:31:23,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:23,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:23,209 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:23,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:31:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:23,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:31:23,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:23,453 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 22:31:23,519 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 22:31:23,604 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 22:31:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:23,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:24,251 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:24,251 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 48 treesize of output 37 [2023-11-06 22:31:24,267 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:24,268 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 1206 treesize of output 1090 [2023-11-06 22:31:24,304 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:24,304 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-11-06 22:31:24,322 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:24,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-11-06 22:31:24,663 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:24,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-11-06 22:31:24,677 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:24,677 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 294 treesize of output 274 [2023-11-06 22:31:24,699 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:24,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-11-06 22:31:24,723 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:24,724 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-11-06 22:31:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:25,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429413428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:25,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:25,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2023-11-06 22:31:25,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862840716] [2023-11-06 22:31:25,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:25,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:31:25,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:25,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:31:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=583, Unknown=30, NotChecked=0, Total=756 [2023-11-06 22:31:27,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:31:28,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 547 [2023-11-06 22:31:28,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 196 transitions, 2621 flow. Second operand has 28 states, 28 states have (on average 162.5) internal successors, (4550), 28 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:28,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:28,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 547 [2023-11-06 22:31:28,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:30,079 INFO L124 PetriNetUnfolderBase]: 1191/2303 cut-off events. [2023-11-06 22:31:30,079 INFO L125 PetriNetUnfolderBase]: For 21219/21219 co-relation queries the response was YES. [2023-11-06 22:31:30,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13468 conditions, 2303 events. 1191/2303 cut-off events. For 21219/21219 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14904 event pairs, 441 based on Foata normal form. 10/2313 useless extension candidates. Maximal degree in co-relation 12738. Up to 988 conditions per place. [2023-11-06 22:31:30,105 INFO L140 encePairwiseOnDemand]: 533/547 looper letters, 166 selfloop transitions, 107 changer transitions 1/274 dead transitions. [2023-11-06 22:31:30,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 274 transitions, 3866 flow [2023-11-06 22:31:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:31:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:31:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3180 transitions. [2023-11-06 22:31:30,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3059751755989608 [2023-11-06 22:31:30,112 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3180 transitions. [2023-11-06 22:31:30,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3180 transitions. [2023-11-06 22:31:30,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:30,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3180 transitions. [2023-11-06 22:31:30,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 167.3684210526316) internal successors, (3180), 19 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:30,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 547.0) internal successors, (10940), 20 states have internal predecessors, (10940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:30,130 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 547.0) internal successors, (10940), 20 states have internal predecessors, (10940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:30,130 INFO L175 Difference]: Start difference. First operand has 137 places, 196 transitions, 2621 flow. Second operand 19 states and 3180 transitions. [2023-11-06 22:31:30,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 274 transitions, 3866 flow [2023-11-06 22:31:30,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 274 transitions, 3710 flow, removed 20 selfloop flow, removed 9 redundant places. [2023-11-06 22:31:30,248 INFO L231 Difference]: Finished difference. Result has 150 places, 200 transitions, 2748 flow [2023-11-06 22:31:30,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2748, PETRI_PLACES=150, PETRI_TRANSITIONS=200} [2023-11-06 22:31:30,249 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 125 predicate places. [2023-11-06 22:31:30,250 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 200 transitions, 2748 flow [2023-11-06 22:31:30,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 162.5) internal successors, (4550), 28 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:30,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:30,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:30,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 22:31:30,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:31:30,458 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 22:31:30,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:30,459 INFO L85 PathProgramCache]: Analyzing trace with hash -907311851, now seen corresponding path program 8 times [2023-11-06 22:31:30,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:30,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516840332] [2023-11-06 22:31:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:30,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:31,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:31,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516840332] [2023-11-06 22:31:31,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516840332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:31,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720888092] [2023-11-06 22:31:31,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:31:31,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:31,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:31,013 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:31,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:31:31,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:31:31,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:31,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:31:31,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:31,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:31,692 INFO L322 Elim1Store]: treesize reduction 11, result has 84.1 percent of original size [2023-11-06 22:31:31,693 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 86 treesize of output 87 [2023-11-06 22:31:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:31,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720888092] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:31,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:31,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 24 [2023-11-06 22:31:31,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858135523] [2023-11-06 22:31:31,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:31,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:31:31,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:31,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:31:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:31:32,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 547 [2023-11-06 22:31:32,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 200 transitions, 2748 flow. Second operand has 10 states, 10 states have (on average 205.9) internal successors, (2059), 10 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:32,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:32,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 547 [2023-11-06 22:31:32,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:33,271 INFO L124 PetriNetUnfolderBase]: 1366/2630 cut-off events. [2023-11-06 22:31:33,271 INFO L125 PetriNetUnfolderBase]: For 26081/26081 co-relation queries the response was YES. [2023-11-06 22:31:33,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15903 conditions, 2630 events. 1366/2630 cut-off events. For 26081/26081 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17407 event pairs, 455 based on Foata normal form. 2/2632 useless extension candidates. Maximal degree in co-relation 15416. Up to 991 conditions per place. [2023-11-06 22:31:33,295 INFO L140 encePairwiseOnDemand]: 533/547 looper letters, 152 selfloop transitions, 138 changer transitions 1/291 dead transitions. [2023-11-06 22:31:33,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 291 transitions, 4361 flow [2023-11-06 22:31:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:31:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:31:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2953 transitions. [2023-11-06 22:31:33,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38560981979629144 [2023-11-06 22:31:33,301 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2953 transitions. [2023-11-06 22:31:33,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2953 transitions. [2023-11-06 22:31:33,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:33,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2953 transitions. [2023-11-06 22:31:33,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 210.92857142857142) internal successors, (2953), 14 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:33,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 547.0) internal successors, (8205), 15 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:33,315 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 547.0) internal successors, (8205), 15 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:33,315 INFO L175 Difference]: Start difference. First operand has 150 places, 200 transitions, 2748 flow. Second operand 14 states and 2953 transitions. [2023-11-06 22:31:33,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 291 transitions, 4361 flow [2023-11-06 22:31:33,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 291 transitions, 4120 flow, removed 31 selfloop flow, removed 11 redundant places. [2023-11-06 22:31:33,462 INFO L231 Difference]: Finished difference. Result has 157 places, 230 transitions, 3479 flow [2023-11-06 22:31:33,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=2566, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3479, PETRI_PLACES=157, PETRI_TRANSITIONS=230} [2023-11-06 22:31:33,463 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 132 predicate places. [2023-11-06 22:31:33,463 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 230 transitions, 3479 flow [2023-11-06 22:31:33,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.9) internal successors, (2059), 10 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:33,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:33,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:33,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:33,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:31:33,670 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 22:31:33,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1847871177, now seen corresponding path program 9 times [2023-11-06 22:31:33,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:33,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66208123] [2023-11-06 22:31:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:33,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:34,255 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 22:31:34,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:34,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66208123] [2023-11-06 22:31:34,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66208123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:34,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384675639] [2023-11-06 22:31:34,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:31:34,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:34,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:34,261 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:34,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:31:34,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:31:34,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:34,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:31:34,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:34,653 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 22:31:34,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:34,870 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 22:31:34,870 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 20 treesize of output 4 [2023-11-06 22:31:34,928 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-06 22:31:34,928 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 82 treesize of output 66 [2023-11-06 22:31:34,957 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 22:31:34,958 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 20 treesize of output 4 [2023-11-06 22:31:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:35,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384675639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:35,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:35,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-11-06 22:31:35,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658589000] [2023-11-06 22:31:35,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:35,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:31:35,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:35,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:31:35,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:31:36,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 547 [2023-11-06 22:31:36,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 230 transitions, 3479 flow. Second operand has 22 states, 22 states have (on average 202.86363636363637) internal successors, (4463), 22 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:36,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:36,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 547 [2023-11-06 22:31:36,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:38,033 INFO L124 PetriNetUnfolderBase]: 1388/2688 cut-off events. [2023-11-06 22:31:38,033 INFO L125 PetriNetUnfolderBase]: For 34234/34234 co-relation queries the response was YES. [2023-11-06 22:31:38,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17479 conditions, 2688 events. 1388/2688 cut-off events. For 34234/34234 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17735 event pairs, 554 based on Foata normal form. 22/2710 useless extension candidates. Maximal degree in co-relation 16941. Up to 1132 conditions per place. [2023-11-06 22:31:38,057 INFO L140 encePairwiseOnDemand]: 535/547 looper letters, 220 selfloop transitions, 65 changer transitions 1/286 dead transitions. [2023-11-06 22:31:38,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 286 transitions, 4564 flow [2023-11-06 22:31:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:31:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:31:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2497 transitions. [2023-11-06 22:31:38,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804082876294942 [2023-11-06 22:31:38,063 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2497 transitions. [2023-11-06 22:31:38,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2497 transitions. [2023-11-06 22:31:38,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:38,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2497 transitions. [2023-11-06 22:31:38,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 208.08333333333334) internal successors, (2497), 12 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:38,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 547.0) internal successors, (7111), 13 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:38,075 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 547.0) internal successors, (7111), 13 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:38,075 INFO L175 Difference]: Start difference. First operand has 157 places, 230 transitions, 3479 flow. Second operand 12 states and 2497 transitions. [2023-11-06 22:31:38,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 286 transitions, 4564 flow [2023-11-06 22:31:38,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 286 transitions, 4336 flow, removed 86 selfloop flow, removed 6 redundant places. [2023-11-06 22:31:38,332 INFO L231 Difference]: Finished difference. Result has 166 places, 236 transitions, 3600 flow [2023-11-06 22:31:38,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3600, PETRI_PLACES=166, PETRI_TRANSITIONS=236} [2023-11-06 22:31:38,333 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 141 predicate places. [2023-11-06 22:31:38,333 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 236 transitions, 3600 flow [2023-11-06 22:31:38,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 202.86363636363637) internal successors, (4463), 22 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:38,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:38,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:38,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:38,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:31:38,539 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 22:31:38,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash -409825207, now seen corresponding path program 1 times [2023-11-06 22:31:38,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:38,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113654811] [2023-11-06 22:31:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:38,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:38,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:38,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113654811] [2023-11-06 22:31:38,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113654811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:38,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:38,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:31:38,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000994309] [2023-11-06 22:31:38,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:38,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:31:38,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:38,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:31:38,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:31:38,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 547 [2023-11-06 22:31:38,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 236 transitions, 3600 flow. Second operand has 5 states, 5 states have (on average 226.8) internal successors, (1134), 5 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:38,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:38,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 547 [2023-11-06 22:31:38,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:39,416 INFO L124 PetriNetUnfolderBase]: 946/1774 cut-off events. [2023-11-06 22:31:39,417 INFO L125 PetriNetUnfolderBase]: For 24469/24469 co-relation queries the response was YES. [2023-11-06 22:31:39,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12279 conditions, 1774 events. 946/1774 cut-off events. For 24469/24469 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10137 event pairs, 448 based on Foata normal form. 38/1812 useless extension candidates. Maximal degree in co-relation 11730. Up to 1555 conditions per place. [2023-11-06 22:31:39,438 INFO L140 encePairwiseOnDemand]: 542/547 looper letters, 176 selfloop transitions, 4 changer transitions 24/204 dead transitions. [2023-11-06 22:31:39,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 204 transitions, 3637 flow [2023-11-06 22:31:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:31:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:31:39,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1157 transitions. [2023-11-06 22:31:39,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230347349177331 [2023-11-06 22:31:39,441 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1157 transitions. [2023-11-06 22:31:39,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1157 transitions. [2023-11-06 22:31:39,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:39,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1157 transitions. [2023-11-06 22:31:39,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 231.4) internal successors, (1157), 5 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:39,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 547.0) internal successors, (3282), 6 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:39,447 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 547.0) internal successors, (3282), 6 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:39,447 INFO L175 Difference]: Start difference. First operand has 166 places, 236 transitions, 3600 flow. Second operand 5 states and 1157 transitions. [2023-11-06 22:31:39,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 204 transitions, 3637 flow [2023-11-06 22:31:39,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 204 transitions, 3442 flow, removed 32 selfloop flow, removed 13 redundant places. [2023-11-06 22:31:39,602 INFO L231 Difference]: Finished difference. Result has 155 places, 180 transitions, 2828 flow [2023-11-06 22:31:39,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=2950, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2828, PETRI_PLACES=155, PETRI_TRANSITIONS=180} [2023-11-06 22:31:39,603 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 130 predicate places. [2023-11-06 22:31:39,603 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 180 transitions, 2828 flow [2023-11-06 22:31:39,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 226.8) internal successors, (1134), 5 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:39,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:39,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:39,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 22:31:39,604 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 22:31:39,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:39,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1758063585, now seen corresponding path program 10 times [2023-11-06 22:31:39,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:39,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809232315] [2023-11-06 22:31:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:39,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:40,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:40,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809232315] [2023-11-06 22:31:40,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809232315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:40,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641263927] [2023-11-06 22:31:40,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:31:40,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:40,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:40,153 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:40,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:31:40,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:31:40,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:40,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:31:40,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:40,371 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 22:31:40,420 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 22:31:40,461 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 22:31:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:31:40,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:31:41,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641263927] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:41,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:41,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 24 [2023-11-06 22:31:41,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227758268] [2023-11-06 22:31:41,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:41,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:31:41,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:41,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:31:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:31:41,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 547 [2023-11-06 22:31:41,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 180 transitions, 2828 flow. Second operand has 6 states, 6 states have (on average 222.16666666666666) internal successors, (1333), 6 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:41,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:41,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 547 [2023-11-06 22:31:41,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:42,665 INFO L124 PetriNetUnfolderBase]: 876/1599 cut-off events. [2023-11-06 22:31:42,665 INFO L125 PetriNetUnfolderBase]: For 18158/18158 co-relation queries the response was YES. [2023-11-06 22:31:42,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10750 conditions, 1599 events. 876/1599 cut-off events. For 18158/18158 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8969 event pairs, 132 based on Foata normal form. 2/1601 useless extension candidates. Maximal degree in co-relation 10669. Up to 591 conditions per place. [2023-11-06 22:31:42,678 INFO L140 encePairwiseOnDemand]: 537/547 looper letters, 111 selfloop transitions, 135 changer transitions 0/246 dead transitions. [2023-11-06 22:31:42,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 246 transitions, 3915 flow [2023-11-06 22:31:42,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:31:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:31:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2502 transitions. [2023-11-06 22:31:42,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158218381253116 [2023-11-06 22:31:42,683 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2502 transitions. [2023-11-06 22:31:42,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2502 transitions. [2023-11-06 22:31:42,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:42,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2502 transitions. [2023-11-06 22:31:42,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 227.45454545454547) internal successors, (2502), 11 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:42,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 547.0) internal successors, (6564), 12 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:42,694 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 547.0) internal successors, (6564), 12 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:42,694 INFO L175 Difference]: Start difference. First operand has 155 places, 180 transitions, 2828 flow. Second operand 11 states and 2502 transitions. [2023-11-06 22:31:42,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 246 transitions, 3915 flow [2023-11-06 22:31:42,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 246 transitions, 3769 flow, removed 38 selfloop flow, removed 7 redundant places. [2023-11-06 22:31:42,803 INFO L231 Difference]: Finished difference. Result has 148 places, 201 transitions, 3370 flow [2023-11-06 22:31:42,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=2747, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3370, PETRI_PLACES=148, PETRI_TRANSITIONS=201} [2023-11-06 22:31:42,803 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 123 predicate places. [2023-11-06 22:31:42,804 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 201 transitions, 3370 flow [2023-11-06 22:31:42,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 222.16666666666666) internal successors, (1333), 6 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:42,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:42,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:42,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-06 22:31:43,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:31:43,005 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 22:31:43,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash 2019196647, now seen corresponding path program 11 times [2023-11-06 22:31:43,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:43,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596185094] [2023-11-06 22:31:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:43,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:43,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:43,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596185094] [2023-11-06 22:31:43,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596185094] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:43,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257433571] [2023-11-06 22:31:43,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:31:43,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:43,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:43,495 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:43,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:31:43,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:31:43,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:43,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:31:43,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:31:43,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:31:43,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257433571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:43,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:31:43,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2023-11-06 22:31:43,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392832464] [2023-11-06 22:31:43,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:43,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:31:43,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:43,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:31:43,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:31:44,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 547 [2023-11-06 22:31:44,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 201 transitions, 3370 flow. Second operand has 9 states, 9 states have (on average 215.11111111111111) internal successors, (1936), 9 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:44,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:44,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 547 [2023-11-06 22:31:44,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:44,719 INFO L124 PetriNetUnfolderBase]: 867/1564 cut-off events. [2023-11-06 22:31:44,719 INFO L125 PetriNetUnfolderBase]: For 17525/17525 co-relation queries the response was YES. [2023-11-06 22:31:44,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10717 conditions, 1564 events. 867/1564 cut-off events. For 17525/17525 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8598 event pairs, 222 based on Foata normal form. 2/1566 useless extension candidates. Maximal degree in co-relation 10638. Up to 881 conditions per place. [2023-11-06 22:31:44,732 INFO L140 encePairwiseOnDemand]: 538/547 looper letters, 147 selfloop transitions, 75 changer transitions 0/222 dead transitions. [2023-11-06 22:31:44,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 222 transitions, 3913 flow [2023-11-06 22:31:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:31:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:31:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1760 transitions. [2023-11-06 22:31:44,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40219378427787933 [2023-11-06 22:31:44,736 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1760 transitions. [2023-11-06 22:31:44,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1760 transitions. [2023-11-06 22:31:44,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:44,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1760 transitions. [2023-11-06 22:31:44,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 220.0) internal successors, (1760), 8 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:44,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 547.0) internal successors, (4923), 9 states have internal predecessors, (4923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:44,744 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 547.0) internal successors, (4923), 9 states have internal predecessors, (4923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:44,745 INFO L175 Difference]: Start difference. First operand has 148 places, 201 transitions, 3370 flow. Second operand 8 states and 1760 transitions. [2023-11-06 22:31:44,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 222 transitions, 3913 flow [2023-11-06 22:31:44,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 222 transitions, 3810 flow, removed 32 selfloop flow, removed 1 redundant places. [2023-11-06 22:31:44,847 INFO L231 Difference]: Finished difference. Result has 155 places, 202 transitions, 3450 flow [2023-11-06 22:31:44,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=3250, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3450, PETRI_PLACES=155, PETRI_TRANSITIONS=202} [2023-11-06 22:31:44,847 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 130 predicate places. [2023-11-06 22:31:44,848 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 202 transitions, 3450 flow [2023-11-06 22:31:44,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 215.11111111111111) internal successors, (1936), 9 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:44,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:44,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:44,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 22:31:45,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:45,049 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 22:31:45,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:45,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1890257031, now seen corresponding path program 12 times [2023-11-06 22:31:45,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:45,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119272171] [2023-11-06 22:31:45,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:45,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:45,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:45,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119272171] [2023-11-06 22:31:45,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119272171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:45,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214834866] [2023-11-06 22:31:45,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:31:45,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:45,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:45,602 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:45,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:31:45,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:31:45,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:45,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:31:45,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:45,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:46,086 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 22:31:46,087 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 20 treesize of output 4 [2023-11-06 22:31:46,152 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-06 22:31:46,153 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 82 treesize of output 66 [2023-11-06 22:31:46,187 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 22:31:46,187 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 20 treesize of output 4 [2023-11-06 22:31:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:46,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214834866] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:46,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:46,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 20 [2023-11-06 22:31:46,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996932563] [2023-11-06 22:31:46,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:46,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:31:46,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:46,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:31:46,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:31:47,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 547 [2023-11-06 22:31:47,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 202 transitions, 3450 flow. Second operand has 10 states, 10 states have (on average 204.9) internal successors, (2049), 10 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:47,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:47,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 547 [2023-11-06 22:31:47,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:47,801 INFO L124 PetriNetUnfolderBase]: 837/1506 cut-off events. [2023-11-06 22:31:47,802 INFO L125 PetriNetUnfolderBase]: For 18615/18615 co-relation queries the response was YES. [2023-11-06 22:31:47,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10501 conditions, 1506 events. 837/1506 cut-off events. For 18615/18615 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8168 event pairs, 259 based on Foata normal form. 22/1528 useless extension candidates. Maximal degree in co-relation 10419. Up to 846 conditions per place. [2023-11-06 22:31:47,813 INFO L140 encePairwiseOnDemand]: 536/547 looper letters, 181 selfloop transitions, 54 changer transitions 0/235 dead transitions. [2023-11-06 22:31:47,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 235 transitions, 4153 flow [2023-11-06 22:31:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:31:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:31:47,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2099 transitions. [2023-11-06 22:31:47,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3837294332723949 [2023-11-06 22:31:47,817 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2099 transitions. [2023-11-06 22:31:47,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2099 transitions. [2023-11-06 22:31:47,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:47,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2099 transitions. [2023-11-06 22:31:47,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 209.9) internal successors, (2099), 10 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:47,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:47,827 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:47,827 INFO L175 Difference]: Start difference. First operand has 155 places, 202 transitions, 3450 flow. Second operand 10 states and 2099 transitions. [2023-11-06 22:31:47,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 235 transitions, 4153 flow [2023-11-06 22:31:47,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 235 transitions, 4001 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:31:47,947 INFO L231 Difference]: Finished difference. Result has 159 places, 203 transitions, 3439 flow [2023-11-06 22:31:47,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3439, PETRI_PLACES=159, PETRI_TRANSITIONS=203} [2023-11-06 22:31:47,948 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 134 predicate places. [2023-11-06 22:31:47,948 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 203 transitions, 3439 flow [2023-11-06 22:31:47,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 204.9) internal successors, (2049), 10 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:47,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:47,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:47,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:48,157 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 22:31:48,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:48,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2107935661, now seen corresponding path program 13 times [2023-11-06 22:31:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:48,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500925093] [2023-11-06 22:31:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:48,915 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 22:31:48,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:48,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500925093] [2023-11-06 22:31:48,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500925093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:48,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484821163] [2023-11-06 22:31:48,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:31:48,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:48,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:48,917 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:48,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:31:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:49,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-06 22:31:49,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:49,237 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 22:31:49,320 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 22:31:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:31:49,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:31:49,592 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:31:49,593 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2023-11-06 22:31:49,665 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 22:31:49,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:50,352 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:50,353 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 42 treesize of output 31 [2023-11-06 22:31:50,364 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:50,365 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 70 treesize of output 66 [2023-11-06 22:31:50,377 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:50,378 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-11-06 22:31:50,416 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:50,416 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 42 treesize of output 31 [2023-11-06 22:31:50,427 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:50,427 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 70 treesize of output 66 [2023-11-06 22:31:50,440 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:50,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-11-06 22:31:50,487 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:50,487 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 104 [2023-11-06 22:31:50,504 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 22:31:50,504 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 966 treesize of output 854 [2023-11-06 22:31:50,555 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:50,556 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 854 treesize of output 806 [2023-11-06 22:31:50,593 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:50,593 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 752 treesize of output 664 [2023-11-06 22:31:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:52,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484821163] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:31:52,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:31:52,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-11-06 22:31:52,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111117587] [2023-11-06 22:31:52,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:31:52,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:31:52,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:52,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:31:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=746, Unknown=8, NotChecked=0, Total=870 [2023-11-06 22:31:54,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 547 [2023-11-06 22:31:54,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 203 transitions, 3439 flow. Second operand has 30 states, 30 states have (on average 162.46666666666667) internal successors, (4874), 30 states have internal predecessors, (4874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:54,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:54,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 547 [2023-11-06 22:31:54,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:55,557 INFO L124 PetriNetUnfolderBase]: 850/1525 cut-off events. [2023-11-06 22:31:55,557 INFO L125 PetriNetUnfolderBase]: For 18060/18060 co-relation queries the response was YES. [2023-11-06 22:31:55,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10592 conditions, 1525 events. 850/1525 cut-off events. For 18060/18060 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8290 event pairs, 131 based on Foata normal form. 24/1549 useless extension candidates. Maximal degree in co-relation 10506. Up to 781 conditions per place. [2023-11-06 22:31:55,570 INFO L140 encePairwiseOnDemand]: 535/547 looper letters, 164 selfloop transitions, 81 changer transitions 0/245 dead transitions. [2023-11-06 22:31:55,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 245 transitions, 4387 flow [2023-11-06 22:31:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:31:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:31:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1834 transitions. [2023-11-06 22:31:55,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30480305800232677 [2023-11-06 22:31:55,573 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1834 transitions. [2023-11-06 22:31:55,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1834 transitions. [2023-11-06 22:31:55,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:55,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1834 transitions. [2023-11-06 22:31:55,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 166.72727272727272) internal successors, (1834), 11 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:55,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 547.0) internal successors, (6564), 12 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:55,584 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 547.0) internal successors, (6564), 12 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:55,585 INFO L175 Difference]: Start difference. First operand has 159 places, 203 transitions, 3439 flow. Second operand 11 states and 1834 transitions. [2023-11-06 22:31:55,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 245 transitions, 4387 flow [2023-11-06 22:31:55,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 245 transitions, 4265 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-11-06 22:31:55,684 INFO L231 Difference]: Finished difference. Result has 162 places, 205 transitions, 3552 flow [2023-11-06 22:31:55,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3552, PETRI_PLACES=162, PETRI_TRANSITIONS=205} [2023-11-06 22:31:55,685 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 137 predicate places. [2023-11-06 22:31:55,685 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 205 transitions, 3552 flow [2023-11-06 22:31:55,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 162.46666666666667) internal successors, (4874), 30 states have internal predecessors, (4874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:55,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:55,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:55,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:31:55,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:55,886 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 22:31:55,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:55,887 INFO L85 PathProgramCache]: Analyzing trace with hash 765142503, now seen corresponding path program 14 times [2023-11-06 22:31:55,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:55,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981175428] [2023-11-06 22:31:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:55,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:56,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:56,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981175428] [2023-11-06 22:31:56,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981175428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:56,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777109113] [2023-11-06 22:31:56,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:31:56,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:56,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:56,541 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:56,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:31:56,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:31:56,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:31:56,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:31:56,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:57,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:31:57,091 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 22:31:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:57,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:31:57,662 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) c_~a2~0.offset))) (let ((.cse5 (forall ((v_ArrVal_651 (Array Int Int)) (~a2~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651) ~a2~0.base) .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|))))) (and (forall ((v_ArrVal_651 (Array Int Int)) (~a2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651))) (let ((.cse2 (select .cse4 ~a2~0.base))) (let ((.cse0 (select (select .cse4 c_~a1~0.base) c_~a1~0.offset)) (.cse1 (select .cse2 c_~a2~0.offset))) (or (= .cse0 .cse1) (< (+ 2147483648 .cse1) .cse0) (< (+ 2147483647 .cse0) .cse1) (not (= (select .cse2 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|))))))) (or (< 0 c_~n1~0) .cse5) (or (< 0 c_~n2~0) .cse5)))) is different from false [2023-11-06 22:31:57,763 INFO L322 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-11-06 22:31:57,764 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 260 treesize of output 241 [2023-11-06 22:31:57,808 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:31:57,808 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 188 treesize of output 186 [2023-11-06 22:31:58,253 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 22:31:58,254 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 32 treesize of output 20 [2023-11-06 22:31:58,264 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 22:31:58,264 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 32 treesize of output 20 [2023-11-06 22:31:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:58,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777109113] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:58,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:31:58,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 11] total 28 [2023-11-06 22:31:58,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543004653] [2023-11-06 22:31:58,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:58,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:31:58,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:31:58,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=650, Unknown=1, NotChecked=52, Total=812 [2023-11-06 22:31:58,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 547 [2023-11-06 22:31:58,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 205 transitions, 3552 flow. Second operand has 11 states, 11 states have (on average 166.72727272727272) internal successors, (1834), 11 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:58,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:31:58,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 547 [2023-11-06 22:31:58,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:31:59,765 INFO L124 PetriNetUnfolderBase]: 887/1581 cut-off events. [2023-11-06 22:31:59,765 INFO L125 PetriNetUnfolderBase]: For 20570/20570 co-relation queries the response was YES. [2023-11-06 22:31:59,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11245 conditions, 1581 events. 887/1581 cut-off events. For 20570/20570 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8529 event pairs, 252 based on Foata normal form. 2/1583 useless extension candidates. Maximal degree in co-relation 11158. Up to 843 conditions per place. [2023-11-06 22:31:59,778 INFO L140 encePairwiseOnDemand]: 532/547 looper letters, 128 selfloop transitions, 131 changer transitions 0/259 dead transitions. [2023-11-06 22:31:59,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 259 transitions, 4793 flow [2023-11-06 22:31:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:31:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:31:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2223 transitions. [2023-11-06 22:31:59,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3126142595978062 [2023-11-06 22:31:59,784 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2223 transitions. [2023-11-06 22:31:59,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2223 transitions. [2023-11-06 22:31:59,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:31:59,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2223 transitions. [2023-11-06 22:31:59,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 171.0) internal successors, (2223), 13 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:59,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 547.0) internal successors, (7658), 14 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:59,797 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 547.0) internal successors, (7658), 14 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:59,797 INFO L175 Difference]: Start difference. First operand has 162 places, 205 transitions, 3552 flow. Second operand 13 states and 2223 transitions. [2023-11-06 22:31:59,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 259 transitions, 4793 flow [2023-11-06 22:31:59,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 259 transitions, 4664 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-11-06 22:31:59,920 INFO L231 Difference]: Finished difference. Result has 169 places, 233 transitions, 4294 flow [2023-11-06 22:31:59,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=3427, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4294, PETRI_PLACES=169, PETRI_TRANSITIONS=233} [2023-11-06 22:31:59,921 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 144 predicate places. [2023-11-06 22:31:59,921 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 233 transitions, 4294 flow [2023-11-06 22:31:59,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 166.72727272727272) internal successors, (1834), 11 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:59,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:31:59,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:59,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:00,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:00,123 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 22:32:00,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:00,123 INFO L85 PathProgramCache]: Analyzing trace with hash -439105535, now seen corresponding path program 15 times [2023-11-06 22:32:00,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:00,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657465880] [2023-11-06 22:32:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:00,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:00,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:00,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657465880] [2023-11-06 22:32:00,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657465880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:00,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87497969] [2023-11-06 22:32:00,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:32:00,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:00,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:00,820 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:00,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:32:00,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:32:00,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:00,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:32:00,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:01,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:32:01,272 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 22:32:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:01,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:01,693 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) c_~a2~0.offset))) (let ((.cse0 (forall ((v_ArrVal_684 (Array Int Int)) (~a2~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) ~a2~0.base) .cse4) |c_thread1Thread1of1ForFork0_#t~mem1#1|))))) (and (or (< 0 c_~n1~0) .cse0) (forall ((v_ArrVal_684 (Array Int Int)) (~a2~0.base Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684))) (let ((.cse3 (select .cse5 ~a2~0.base))) (let ((.cse2 (select (select .cse5 c_~a1~0.base) c_~a1~0.offset)) (.cse1 (select .cse3 c_~a2~0.offset))) (or (< (+ .cse1 2147483648) .cse2) (not (= (select .cse3 .cse4) |c_thread1Thread1of1ForFork0_#t~mem1#1|)) (< (+ 2147483647 .cse2) .cse1) (= .cse2 .cse1)))))) (or (< 0 c_~n2~0) .cse0)))) is different from false [2023-11-06 22:32:01,713 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:01,714 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 48 treesize of output 36 [2023-11-06 22:32:01,718 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 24 treesize of output 18 [2023-11-06 22:32:01,734 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:01,735 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 48 treesize of output 36 [2023-11-06 22:32:01,739 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 24 treesize of output 18 [2023-11-06 22:32:01,821 INFO L322 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-11-06 22:32:01,822 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 260 treesize of output 241 [2023-11-06 22:32:01,858 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:01,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 188 treesize of output 186 [2023-11-06 22:32:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:02,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87497969] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:02,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:32:02,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 11] total 27 [2023-11-06 22:32:02,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23993192] [2023-11-06 22:32:02,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:02,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:32:02,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:32:02,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=600, Unknown=1, NotChecked=50, Total=756 [2023-11-06 22:32:02,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 547 [2023-11-06 22:32:02,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 233 transitions, 4294 flow. Second operand has 11 states, 11 states have (on average 166.72727272727272) internal successors, (1834), 11 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:02,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:02,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 547 [2023-11-06 22:32:02,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:03,889 INFO L124 PetriNetUnfolderBase]: 865/1539 cut-off events. [2023-11-06 22:32:03,889 INFO L125 PetriNetUnfolderBase]: For 22349/22349 co-relation queries the response was YES. [2023-11-06 22:32:03,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11703 conditions, 1539 events. 865/1539 cut-off events. For 22349/22349 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8223 event pairs, 253 based on Foata normal form. 16/1555 useless extension candidates. Maximal degree in co-relation 11615. Up to 834 conditions per place. [2023-11-06 22:32:03,903 INFO L140 encePairwiseOnDemand]: 532/547 looper letters, 156 selfloop transitions, 106 changer transitions 0/262 dead transitions. [2023-11-06 22:32:03,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 262 transitions, 5079 flow [2023-11-06 22:32:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:32:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:32:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1887 transitions. [2023-11-06 22:32:03,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31361143426956956 [2023-11-06 22:32:03,907 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1887 transitions. [2023-11-06 22:32:03,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1887 transitions. [2023-11-06 22:32:03,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:03,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1887 transitions. [2023-11-06 22:32:03,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 171.54545454545453) internal successors, (1887), 11 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:03,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 547.0) internal successors, (6564), 12 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:03,917 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 547.0) internal successors, (6564), 12 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:03,917 INFO L175 Difference]: Start difference. First operand has 169 places, 233 transitions, 4294 flow. Second operand 11 states and 1887 transitions. [2023-11-06 22:32:03,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 262 transitions, 5079 flow [2023-11-06 22:32:04,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 262 transitions, 4806 flow, removed 19 selfloop flow, removed 11 redundant places. [2023-11-06 22:32:04,026 INFO L231 Difference]: Finished difference. Result has 169 places, 231 transitions, 4212 flow [2023-11-06 22:32:04,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=3964, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4212, PETRI_PLACES=169, PETRI_TRANSITIONS=231} [2023-11-06 22:32:04,027 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 144 predicate places. [2023-11-06 22:32:04,027 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 231 transitions, 4212 flow [2023-11-06 22:32:04,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 166.72727272727272) internal successors, (1834), 11 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:04,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:04,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:04,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:04,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:04,228 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 22:32:04,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:04,228 INFO L85 PathProgramCache]: Analyzing trace with hash -241893372, now seen corresponding path program 1 times [2023-11-06 22:32:04,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:04,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232862862] [2023-11-06 22:32:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:04,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:32:04,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:04,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232862862] [2023-11-06 22:32:04,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232862862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:04,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400192828] [2023-11-06 22:32:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:04,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:04,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:04,584 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:04,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:32:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:04,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:32:04,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:05,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:05,208 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:05,208 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 145 treesize of output 125 [2023-11-06 22:32:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:05,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400192828] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:05,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:05,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2023-11-06 22:32:05,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615360177] [2023-11-06 22:32:05,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:05,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:32:05,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:32:05,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:32:08,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 547 [2023-11-06 22:32:08,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 231 transitions, 4212 flow. Second operand has 29 states, 29 states have (on average 207.79310344827587) internal successors, (6026), 29 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:08,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:08,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 547 [2023-11-06 22:32:08,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:10,413 INFO L124 PetriNetUnfolderBase]: 2486/4491 cut-off events. [2023-11-06 22:32:10,413 INFO L125 PetriNetUnfolderBase]: For 62282/62282 co-relation queries the response was YES. [2023-11-06 22:32:10,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33929 conditions, 4491 events. 2486/4491 cut-off events. For 62282/62282 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 30582 event pairs, 480 based on Foata normal form. 101/4592 useless extension candidates. Maximal degree in co-relation 32751. Up to 1526 conditions per place. [2023-11-06 22:32:10,456 INFO L140 encePairwiseOnDemand]: 532/547 looper letters, 621 selfloop transitions, 125 changer transitions 45/791 dead transitions. [2023-11-06 22:32:10,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 791 transitions, 15440 flow [2023-11-06 22:32:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:32:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:32:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5099 transitions. [2023-11-06 22:32:10,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38840645947592933 [2023-11-06 22:32:10,466 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5099 transitions. [2023-11-06 22:32:10,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5099 transitions. [2023-11-06 22:32:10,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:10,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5099 transitions. [2023-11-06 22:32:10,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 212.45833333333334) internal successors, (5099), 24 states have internal predecessors, (5099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:10,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 547.0) internal successors, (13675), 25 states have internal predecessors, (13675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:10,497 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 547.0) internal successors, (13675), 25 states have internal predecessors, (13675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:10,497 INFO L175 Difference]: Start difference. First operand has 169 places, 231 transitions, 4212 flow. Second operand 24 states and 5099 transitions. [2023-11-06 22:32:10,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 791 transitions, 15440 flow [2023-11-06 22:32:10,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 791 transitions, 14781 flow, removed 29 selfloop flow, removed 9 redundant places. [2023-11-06 22:32:10,874 INFO L231 Difference]: Finished difference. Result has 192 places, 348 transitions, 6714 flow [2023-11-06 22:32:10,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=3991, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=6714, PETRI_PLACES=192, PETRI_TRANSITIONS=348} [2023-11-06 22:32:10,875 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 167 predicate places. [2023-11-06 22:32:10,875 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 348 transitions, 6714 flow [2023-11-06 22:32:10,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 207.79310344827587) internal successors, (6026), 29 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:10,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:10,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:10,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:11,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:32:11,080 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 22:32:11,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:11,081 INFO L85 PathProgramCache]: Analyzing trace with hash 934340654, now seen corresponding path program 1 times [2023-11-06 22:32:11,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:11,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695374778] [2023-11-06 22:32:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:11,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:12,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:12,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695374778] [2023-11-06 22:32:12,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695374778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:12,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212356448] [2023-11-06 22:32:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:12,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:12,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:12,104 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:12,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:32:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:12,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:32:12,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:12,394 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 22:32:12,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:32:12,489 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 22:32:12,830 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:32:12,831 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 39 treesize of output 19 [2023-11-06 22:32:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:12,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:20,006 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:20,007 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 47 treesize of output 36 [2023-11-06 22:32:20,022 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-06 22:32:20,023 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 566 treesize of output 509 [2023-11-06 22:32:20,041 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:20,041 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-11-06 22:32:20,057 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:20,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-11-06 22:32:20,375 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:20,376 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 47 treesize of output 36 [2023-11-06 22:32:20,392 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-06 22:32:20,393 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 566 treesize of output 509 [2023-11-06 22:32:20,410 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:20,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 222 [2023-11-06 22:32:20,428 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:20,428 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 206 [2023-11-06 22:32:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:20,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212356448] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:20,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:20,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2023-11-06 22:32:20,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646243766] [2023-11-06 22:32:20,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:20,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:32:20,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:20,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:32:20,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1023, Unknown=14, NotChecked=0, Total=1260 [2023-11-06 22:32:25,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 547 [2023-11-06 22:32:25,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 348 transitions, 6714 flow. Second operand has 36 states, 36 states have (on average 153.58333333333334) internal successors, (5529), 36 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:25,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:25,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 547 [2023-11-06 22:32:25,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:28,715 INFO L124 PetriNetUnfolderBase]: 2902/5350 cut-off events. [2023-11-06 22:32:28,715 INFO L125 PetriNetUnfolderBase]: For 83335/83335 co-relation queries the response was YES. [2023-11-06 22:32:28,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42017 conditions, 5350 events. 2902/5350 cut-off events. For 83335/83335 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 38415 event pairs, 603 based on Foata normal form. 18/5368 useless extension candidates. Maximal degree in co-relation 41468. Up to 1888 conditions per place. [2023-11-06 22:32:28,777 INFO L140 encePairwiseOnDemand]: 531/547 looper letters, 346 selfloop transitions, 186 changer transitions 12/544 dead transitions. [2023-11-06 22:32:28,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 544 transitions, 10326 flow [2023-11-06 22:32:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:32:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:32:28,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3169 transitions. [2023-11-06 22:32:28,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2896709323583181 [2023-11-06 22:32:28,783 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3169 transitions. [2023-11-06 22:32:28,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3169 transitions. [2023-11-06 22:32:28,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:28,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3169 transitions. [2023-11-06 22:32:28,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 158.45) internal successors, (3169), 20 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:28,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 547.0) internal successors, (11487), 21 states have internal predecessors, (11487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:28,806 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 547.0) internal successors, (11487), 21 states have internal predecessors, (11487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:28,806 INFO L175 Difference]: Start difference. First operand has 192 places, 348 transitions, 6714 flow. Second operand 20 states and 3169 transitions. [2023-11-06 22:32:28,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 544 transitions, 10326 flow [2023-11-06 22:32:29,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 544 transitions, 10101 flow, removed 97 selfloop flow, removed 8 redundant places. [2023-11-06 22:32:29,436 INFO L231 Difference]: Finished difference. Result has 210 places, 413 transitions, 7990 flow [2023-11-06 22:32:29,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=6545, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7990, PETRI_PLACES=210, PETRI_TRANSITIONS=413} [2023-11-06 22:32:29,437 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 185 predicate places. [2023-11-06 22:32:29,437 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 413 transitions, 7990 flow [2023-11-06 22:32:29,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 153.58333333333334) internal successors, (5529), 36 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:29,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:29,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:29,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:29,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:29,638 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 22:32:29,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:29,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1205489236, now seen corresponding path program 2 times [2023-11-06 22:32:29,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:29,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740194349] [2023-11-06 22:32:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:29,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:30,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:30,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740194349] [2023-11-06 22:32:30,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740194349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:30,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375978129] [2023-11-06 22:32:30,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:32:30,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:30,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:30,457 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:30,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:32:30,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:32:30,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:30,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:32:30,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:30,878 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:32:30,879 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 39 treesize of output 19 [2023-11-06 22:32:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:32:30,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:30,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375978129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:30,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:32:30,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 17 [2023-11-06 22:32:30,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604281179] [2023-11-06 22:32:30,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:30,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:32:30,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:32:30,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:32:31,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 547 [2023-11-06 22:32:31,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 413 transitions, 7990 flow. Second operand has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:31,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:31,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 547 [2023-11-06 22:32:31,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:33,647 INFO L124 PetriNetUnfolderBase]: 2896/5356 cut-off events. [2023-11-06 22:32:33,647 INFO L125 PetriNetUnfolderBase]: For 96870/96870 co-relation queries the response was YES. [2023-11-06 22:32:33,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44156 conditions, 5356 events. 2896/5356 cut-off events. For 96870/96870 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 38559 event pairs, 862 based on Foata normal form. 30/5386 useless extension candidates. Maximal degree in co-relation 43907. Up to 3100 conditions per place. [2023-11-06 22:32:33,699 INFO L140 encePairwiseOnDemand]: 534/547 looper letters, 354 selfloop transitions, 109 changer transitions 11/474 dead transitions. [2023-11-06 22:32:33,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 474 transitions, 9749 flow [2023-11-06 22:32:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:32:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:32:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2335 transitions. [2023-11-06 22:32:33,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880671430945654 [2023-11-06 22:32:33,703 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2335 transitions. [2023-11-06 22:32:33,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2335 transitions. [2023-11-06 22:32:33,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:33,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2335 transitions. [2023-11-06 22:32:33,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 212.27272727272728) internal successors, (2335), 11 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:33,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 547.0) internal successors, (6564), 12 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:33,714 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 547.0) internal successors, (6564), 12 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:33,714 INFO L175 Difference]: Start difference. First operand has 210 places, 413 transitions, 7990 flow. Second operand 11 states and 2335 transitions. [2023-11-06 22:32:33,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 474 transitions, 9749 flow [2023-11-06 22:32:34,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 474 transitions, 9637 flow, removed 48 selfloop flow, removed 6 redundant places. [2023-11-06 22:32:34,379 INFO L231 Difference]: Finished difference. Result has 215 places, 413 transitions, 8122 flow [2023-11-06 22:32:34,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=7882, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8122, PETRI_PLACES=215, PETRI_TRANSITIONS=413} [2023-11-06 22:32:34,381 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 190 predicate places. [2023-11-06 22:32:34,381 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 413 transitions, 8122 flow [2023-11-06 22:32:34,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:34,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:34,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:34,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:34,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:34,582 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 22:32:34,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash 372184484, now seen corresponding path program 3 times [2023-11-06 22:32:34,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:34,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781339597] [2023-11-06 22:32:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:34,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:35,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:35,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781339597] [2023-11-06 22:32:35,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781339597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:35,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776796326] [2023-11-06 22:32:35,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:32:35,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:35,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:35,617 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:35,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:32:35,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:32:35,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:35,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:32:35,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:36,259 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:32:36,260 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 39 treesize of output 19 [2023-11-06 22:32:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:32:36,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:36,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776796326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:36,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:32:36,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2023-11-06 22:32:36,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144745441] [2023-11-06 22:32:36,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:36,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:32:36,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:36,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:32:36,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:32:36,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 547 [2023-11-06 22:32:36,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 413 transitions, 8122 flow. Second operand has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:36,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:36,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 547 [2023-11-06 22:32:36,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:39,031 INFO L124 PetriNetUnfolderBase]: 2872/5332 cut-off events. [2023-11-06 22:32:39,031 INFO L125 PetriNetUnfolderBase]: For 100881/100881 co-relation queries the response was YES. [2023-11-06 22:32:39,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44472 conditions, 5332 events. 2872/5332 cut-off events. For 100881/100881 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 38541 event pairs, 848 based on Foata normal form. 30/5362 useless extension candidates. Maximal degree in co-relation 44221. Up to 3100 conditions per place. [2023-11-06 22:32:39,096 INFO L140 encePairwiseOnDemand]: 534/547 looper letters, 349 selfloop transitions, 106 changer transitions 18/473 dead transitions. [2023-11-06 22:32:39,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 473 transitions, 9843 flow [2023-11-06 22:32:39,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:32:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:32:39,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2541 transitions. [2023-11-06 22:32:39,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38711151736745886 [2023-11-06 22:32:39,105 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2541 transitions. [2023-11-06 22:32:39,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2541 transitions. [2023-11-06 22:32:39,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:39,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2541 transitions. [2023-11-06 22:32:39,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 211.75) internal successors, (2541), 12 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:39,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 547.0) internal successors, (7111), 13 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:39,118 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 547.0) internal successors, (7111), 13 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:39,118 INFO L175 Difference]: Start difference. First operand has 215 places, 413 transitions, 8122 flow. Second operand 12 states and 2541 transitions. [2023-11-06 22:32:39,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 473 transitions, 9843 flow [2023-11-06 22:32:39,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 473 transitions, 9597 flow, removed 14 selfloop flow, removed 10 redundant places. [2023-11-06 22:32:39,968 INFO L231 Difference]: Finished difference. Result has 216 places, 406 transitions, 7993 flow [2023-11-06 22:32:39,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=7894, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7993, PETRI_PLACES=216, PETRI_TRANSITIONS=406} [2023-11-06 22:32:39,969 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 191 predicate places. [2023-11-06 22:32:39,969 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 406 transitions, 7993 flow [2023-11-06 22:32:39,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:39,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:39,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:39,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:40,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:32:40,176 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 22:32:40,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1215608212, now seen corresponding path program 4 times [2023-11-06 22:32:40,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:40,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513404336] [2023-11-06 22:32:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:40,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:40,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:40,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513404336] [2023-11-06 22:32:40,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513404336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:40,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042191294] [2023-11-06 22:32:40,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:32:40,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:40,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:40,824 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:40,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:32:40,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:32:40,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:40,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:32:40,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:41,317 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:32:41,318 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 39 treesize of output 19 [2023-11-06 22:32:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:32:41,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:41,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042191294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:41,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:32:41,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-11-06 22:32:41,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065433370] [2023-11-06 22:32:41,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:41,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:32:41,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:41,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:32:41,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:32:42,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 547 [2023-11-06 22:32:42,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 406 transitions, 7993 flow. Second operand has 12 states, 12 states have (on average 205.66666666666666) internal successors, (2468), 12 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:42,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:42,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 547 [2023-11-06 22:32:42,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:44,310 INFO L124 PetriNetUnfolderBase]: 2878/5398 cut-off events. [2023-11-06 22:32:44,310 INFO L125 PetriNetUnfolderBase]: For 101373/101373 co-relation queries the response was YES. [2023-11-06 22:32:44,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44728 conditions, 5398 events. 2878/5398 cut-off events. For 101373/101373 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 39581 event pairs, 874 based on Foata normal form. 42/5440 useless extension candidates. Maximal degree in co-relation 44453. Up to 3100 conditions per place. [2023-11-06 22:32:44,364 INFO L140 encePairwiseOnDemand]: 534/547 looper letters, 353 selfloop transitions, 108 changer transitions 14/475 dead transitions. [2023-11-06 22:32:44,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 475 transitions, 9712 flow [2023-11-06 22:32:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:32:44,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:32:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2943 transitions. [2023-11-06 22:32:44,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38430399582136326 [2023-11-06 22:32:44,369 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2943 transitions. [2023-11-06 22:32:44,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2943 transitions. [2023-11-06 22:32:44,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:44,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2943 transitions. [2023-11-06 22:32:44,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 210.21428571428572) internal successors, (2943), 14 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:44,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 547.0) internal successors, (8205), 15 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:44,380 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 547.0) internal successors, (8205), 15 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:44,380 INFO L175 Difference]: Start difference. First operand has 216 places, 406 transitions, 7993 flow. Second operand 14 states and 2943 transitions. [2023-11-06 22:32:44,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 475 transitions, 9712 flow [2023-11-06 22:32:45,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 475 transitions, 9432 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-11-06 22:32:45,017 INFO L231 Difference]: Finished difference. Result has 218 places, 406 transitions, 8001 flow [2023-11-06 22:32:45,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8001, PETRI_PLACES=218, PETRI_TRANSITIONS=406} [2023-11-06 22:32:45,018 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 193 predicate places. [2023-11-06 22:32:45,018 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 406 transitions, 8001 flow [2023-11-06 22:32:45,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.66666666666666) internal successors, (2468), 12 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:45,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:45,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:45,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:45,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:32:45,225 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 22:32:45,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash -194145564, now seen corresponding path program 5 times [2023-11-06 22:32:45,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:45,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566121613] [2023-11-06 22:32:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:45,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:46,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566121613] [2023-11-06 22:32:46,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566121613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:46,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800112474] [2023-11-06 22:32:46,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:32:46,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:46,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:46,044 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:46,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:32:46,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:32:46,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:46,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:32:46,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:46,339 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:32:46,389 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 22:32:46,445 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 22:32:46,837 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:32:46,837 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 39 treesize of output 19 [2023-11-06 22:32:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:46,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:52,209 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:52,210 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-11-06 22:32:52,230 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-06 22:32:52,230 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 566 treesize of output 509 [2023-11-06 22:32:52,256 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:52,256 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 222 [2023-11-06 22:32:52,277 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:52,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 206 [2023-11-06 22:32:52,800 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:52,800 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 47 treesize of output 36 [2023-11-06 22:32:52,817 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-06 22:32:52,818 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 566 treesize of output 509 [2023-11-06 22:32:52,841 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:52,841 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-11-06 22:32:52,860 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:52,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-11-06 22:32:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:53,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800112474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:53,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:32:53,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 34 [2023-11-06 22:32:53,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338308950] [2023-11-06 22:32:53,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:53,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:32:53,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:53,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:32:53,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1016, Unknown=15, NotChecked=0, Total=1260 [2023-11-06 22:32:54,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 547 [2023-11-06 22:32:54,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 406 transitions, 8001 flow. Second operand has 36 states, 36 states have (on average 153.58333333333334) internal successors, (5529), 36 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:54,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:32:54,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 547 [2023-11-06 22:32:54,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:32:58,611 INFO L124 PetriNetUnfolderBase]: 2820/5399 cut-off events. [2023-11-06 22:32:58,612 INFO L125 PetriNetUnfolderBase]: For 97388/97388 co-relation queries the response was YES. [2023-11-06 22:32:58,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44190 conditions, 5399 events. 2820/5399 cut-off events. For 97388/97388 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40555 event pairs, 285 based on Foata normal form. 63/5462 useless extension candidates. Maximal degree in co-relation 43902. Up to 1790 conditions per place. [2023-11-06 22:32:58,685 INFO L140 encePairwiseOnDemand]: 531/547 looper letters, 295 selfloop transitions, 264 changer transitions 9/568 dead transitions. [2023-11-06 22:32:58,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 568 transitions, 10877 flow [2023-11-06 22:32:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:32:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:32:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4281 transitions. [2023-11-06 22:32:58,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28986390412350194 [2023-11-06 22:32:58,694 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4281 transitions. [2023-11-06 22:32:58,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4281 transitions. [2023-11-06 22:32:58,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:32:58,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4281 transitions. [2023-11-06 22:32:58,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 158.55555555555554) internal successors, (4281), 27 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:58,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 547.0) internal successors, (15316), 28 states have internal predecessors, (15316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:58,717 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 547.0) internal successors, (15316), 28 states have internal predecessors, (15316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:58,718 INFO L175 Difference]: Start difference. First operand has 218 places, 406 transitions, 8001 flow. Second operand 27 states and 4281 transitions. [2023-11-06 22:32:58,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 568 transitions, 10877 flow [2023-11-06 22:32:59,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 568 transitions, 10655 flow, removed 23 selfloop flow, removed 8 redundant places. [2023-11-06 22:32:59,480 INFO L231 Difference]: Finished difference. Result has 240 places, 446 transitions, 9094 flow [2023-11-06 22:32:59,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=7733, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=9094, PETRI_PLACES=240, PETRI_TRANSITIONS=446} [2023-11-06 22:32:59,481 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 215 predicate places. [2023-11-06 22:32:59,481 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 446 transitions, 9094 flow [2023-11-06 22:32:59,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 153.58333333333334) internal successors, (5529), 36 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:59,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:32:59,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:59,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:59,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:32:59,684 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 22:32:59,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:59,685 INFO L85 PathProgramCache]: Analyzing trace with hash 373978416, now seen corresponding path program 6 times [2023-11-06 22:32:59,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:59,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533996780] [2023-11-06 22:32:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:59,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:00,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:00,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533996780] [2023-11-06 22:33:00,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533996780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:00,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725190188] [2023-11-06 22:33:00,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:33:00,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:00,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:00,640 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:00,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:33:00,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-06 22:33:00,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:00,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:33:00,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:01,018 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:33:01,018 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 39 treesize of output 19 [2023-11-06 22:33:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:33:01,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:01,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725190188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:01,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:33:01,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2023-11-06 22:33:01,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846364862] [2023-11-06 22:33:01,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:01,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:33:01,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:01,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:33:01,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:33:01,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 547 [2023-11-06 22:33:01,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 446 transitions, 9094 flow. Second operand has 11 states, 11 states have (on average 208.8181818181818) internal successors, (2297), 11 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:01,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:01,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 547 [2023-11-06 22:33:01,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:03,321 INFO L124 PetriNetUnfolderBase]: 2781/5402 cut-off events. [2023-11-06 22:33:03,321 INFO L125 PetriNetUnfolderBase]: For 103131/103131 co-relation queries the response was YES. [2023-11-06 22:33:03,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45455 conditions, 5402 events. 2781/5402 cut-off events. For 103131/103131 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 41304 event pairs, 786 based on Foata normal form. 15/5417 useless extension candidates. Maximal degree in co-relation 45162. Up to 3121 conditions per place. [2023-11-06 22:33:03,384 INFO L140 encePairwiseOnDemand]: 536/547 looper letters, 362 selfloop transitions, 103 changer transitions 30/495 dead transitions. [2023-11-06 22:33:03,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 495 transitions, 10677 flow [2023-11-06 22:33:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:33:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:33:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2136 transitions. [2023-11-06 22:33:03,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904936014625229 [2023-11-06 22:33:03,388 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2136 transitions. [2023-11-06 22:33:03,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2136 transitions. [2023-11-06 22:33:03,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:03,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2136 transitions. [2023-11-06 22:33:03,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 213.6) internal successors, (2136), 10 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:03,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:03,396 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:03,396 INFO L175 Difference]: Start difference. First operand has 240 places, 446 transitions, 9094 flow. Second operand 10 states and 2136 transitions. [2023-11-06 22:33:03,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 495 transitions, 10677 flow [2023-11-06 22:33:04,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 495 transitions, 10100 flow, removed 120 selfloop flow, removed 16 redundant places. [2023-11-06 22:33:04,224 INFO L231 Difference]: Finished difference. Result has 237 places, 436 transitions, 8683 flow [2023-11-06 22:33:04,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=8573, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8683, PETRI_PLACES=237, PETRI_TRANSITIONS=436} [2023-11-06 22:33:04,224 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 212 predicate places. [2023-11-06 22:33:04,225 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 436 transitions, 8683 flow [2023-11-06 22:33:04,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 208.8181818181818) internal successors, (2297), 11 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:04,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:04,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:04,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-06 22:33:04,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:04,431 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 22:33:04,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:04,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2007949806, now seen corresponding path program 7 times [2023-11-06 22:33:04,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:04,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100891416] [2023-11-06 22:33:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:04,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:05,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:05,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100891416] [2023-11-06 22:33:05,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100891416] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:05,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620374367] [2023-11-06 22:33:05,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:33:05,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:05,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:05,279 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:05,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:33:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:05,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 22:33:05,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:05,550 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 22:33:05,601 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 22:33:05,650 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 22:33:05,861 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:33:05,861 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 39 treesize of output 19 [2023-11-06 22:33:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:05,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:06,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620374367] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:06,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:33:06,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11] total 27 [2023-11-06 22:33:06,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047854842] [2023-11-06 22:33:06,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:06,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:33:06,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:06,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:33:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:33:07,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 547 [2023-11-06 22:33:07,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 436 transitions, 8683 flow. Second operand has 11 states, 11 states have (on average 200.8181818181818) internal successors, (2209), 11 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:07,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:07,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 547 [2023-11-06 22:33:07,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:10,349 INFO L124 PetriNetUnfolderBase]: 2707/5167 cut-off events. [2023-11-06 22:33:10,350 INFO L125 PetriNetUnfolderBase]: For 95814/95814 co-relation queries the response was YES. [2023-11-06 22:33:10,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42943 conditions, 5167 events. 2707/5167 cut-off events. For 95814/95814 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 38213 event pairs, 996 based on Foata normal form. 6/5173 useless extension candidates. Maximal degree in co-relation 42666. Up to 4311 conditions per place. [2023-11-06 22:33:10,407 INFO L140 encePairwiseOnDemand]: 534/547 looper letters, 401 selfloop transitions, 50 changer transitions 37/488 dead transitions. [2023-11-06 22:33:10,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 488 transitions, 10180 flow [2023-11-06 22:33:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:33:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:33:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2255 transitions. [2023-11-06 22:33:10,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37477148080438755 [2023-11-06 22:33:10,411 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2255 transitions. [2023-11-06 22:33:10,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2255 transitions. [2023-11-06 22:33:10,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:10,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2255 transitions. [2023-11-06 22:33:10,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 205.0) internal successors, (2255), 11 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:10,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 547.0) internal successors, (6564), 12 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:10,416 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 547.0) internal successors, (6564), 12 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:10,416 INFO L175 Difference]: Start difference. First operand has 237 places, 436 transitions, 8683 flow. Second operand 11 states and 2255 transitions. [2023-11-06 22:33:10,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 488 transitions, 10180 flow [2023-11-06 22:33:11,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 488 transitions, 9989 flow, removed 24 selfloop flow, removed 10 redundant places. [2023-11-06 22:33:11,038 INFO L231 Difference]: Finished difference. Result has 235 places, 428 transitions, 8514 flow [2023-11-06 22:33:11,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=8539, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8514, PETRI_PLACES=235, PETRI_TRANSITIONS=428} [2023-11-06 22:33:11,039 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 210 predicate places. [2023-11-06 22:33:11,039 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 428 transitions, 8514 flow [2023-11-06 22:33:11,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.8181818181818) internal successors, (2209), 11 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:11,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:11,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:11,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:11,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-06 22:33:11,244 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 22:33:11,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:11,244 INFO L85 PathProgramCache]: Analyzing trace with hash -233433464, now seen corresponding path program 8 times [2023-11-06 22:33:11,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:11,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770158030] [2023-11-06 22:33:11,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:11,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:12,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:12,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770158030] [2023-11-06 22:33:12,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770158030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:12,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741980478] [2023-11-06 22:33:12,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:33:12,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:12,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:12,057 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:12,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:33:12,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:33:12,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:12,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:33:12,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:12,585 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:33:12,586 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 39 treesize of output 19 [2023-11-06 22:33:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:33:12,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:12,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741980478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:12,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:33:12,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2023-11-06 22:33:12,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732928456] [2023-11-06 22:33:12,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:12,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:33:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:12,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:33:12,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:33:13,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 547 [2023-11-06 22:33:13,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 428 transitions, 8514 flow. Second operand has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:13,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:13,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 547 [2023-11-06 22:33:13,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:14,972 INFO L124 PetriNetUnfolderBase]: 2653/5044 cut-off events. [2023-11-06 22:33:14,972 INFO L125 PetriNetUnfolderBase]: For 94302/94302 co-relation queries the response was YES. [2023-11-06 22:33:15,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41692 conditions, 5044 events. 2653/5044 cut-off events. For 94302/94302 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 36983 event pairs, 865 based on Foata normal form. 6/5050 useless extension candidates. Maximal degree in co-relation 41430. Up to 3121 conditions per place. [2023-11-06 22:33:15,025 INFO L140 encePairwiseOnDemand]: 535/547 looper letters, 337 selfloop transitions, 108 changer transitions 16/461 dead transitions. [2023-11-06 22:33:15,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 461 transitions, 9655 flow [2023-11-06 22:33:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:33:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:33:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2534 transitions. [2023-11-06 22:33:15,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38604509445460083 [2023-11-06 22:33:15,032 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2534 transitions. [2023-11-06 22:33:15,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2534 transitions. [2023-11-06 22:33:15,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:15,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2534 transitions. [2023-11-06 22:33:15,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 211.16666666666666) internal successors, (2534), 12 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:15,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 547.0) internal successors, (7111), 13 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:15,042 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 547.0) internal successors, (7111), 13 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:15,042 INFO L175 Difference]: Start difference. First operand has 235 places, 428 transitions, 8514 flow. Second operand 12 states and 2534 transitions. [2023-11-06 22:33:15,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 461 transitions, 9655 flow [2023-11-06 22:33:15,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 461 transitions, 9547 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-11-06 22:33:15,625 INFO L231 Difference]: Finished difference. Result has 237 places, 420 transitions, 8461 flow [2023-11-06 22:33:15,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=8418, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8461, PETRI_PLACES=237, PETRI_TRANSITIONS=420} [2023-11-06 22:33:15,626 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 212 predicate places. [2023-11-06 22:33:15,626 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 420 transitions, 8461 flow [2023-11-06 22:33:15,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:15,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:15,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:15,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:15,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:15,827 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 22:33:15,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:15,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1337879442, now seen corresponding path program 9 times [2023-11-06 22:33:15,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:15,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668538370] [2023-11-06 22:33:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:15,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:16,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:16,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668538370] [2023-11-06 22:33:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668538370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465512292] [2023-11-06 22:33:16,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:33:16,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:16,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:16,802 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:16,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:33:16,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:33:16,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:16,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:33:16,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:17,445 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:33:17,445 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 39 treesize of output 19 [2023-11-06 22:33:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:33:17,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:17,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465512292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:17,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:33:17,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2023-11-06 22:33:17,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127605547] [2023-11-06 22:33:17,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:17,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:33:17,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:17,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:33:17,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:33:18,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 547 [2023-11-06 22:33:18,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 420 transitions, 8461 flow. Second operand has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:18,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:18,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 547 [2023-11-06 22:33:18,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:19,958 INFO L124 PetriNetUnfolderBase]: 2625/4937 cut-off events. [2023-11-06 22:33:19,958 INFO L125 PetriNetUnfolderBase]: For 93079/93079 co-relation queries the response was YES. [2023-11-06 22:33:19,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41243 conditions, 4937 events. 2625/4937 cut-off events. For 93079/93079 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 35548 event pairs, 669 based on Foata normal form. 3/4940 useless extension candidates. Maximal degree in co-relation 40994. Up to 3223 conditions per place. [2023-11-06 22:33:20,010 INFO L140 encePairwiseOnDemand]: 537/547 looper letters, 239 selfloop transitions, 201 changer transitions 19/459 dead transitions. [2023-11-06 22:33:20,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 459 transitions, 9646 flow [2023-11-06 22:33:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:33:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:33:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2107 transitions. [2023-11-06 22:33:20,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38519195612431445 [2023-11-06 22:33:20,013 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2107 transitions. [2023-11-06 22:33:20,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2107 transitions. [2023-11-06 22:33:20,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:20,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2107 transitions. [2023-11-06 22:33:20,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 210.7) internal successors, (2107), 10 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:20,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:20,019 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:20,019 INFO L175 Difference]: Start difference. First operand has 237 places, 420 transitions, 8461 flow. Second operand 10 states and 2107 transitions. [2023-11-06 22:33:20,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 459 transitions, 9646 flow [2023-11-06 22:33:20,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 459 transitions, 9383 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-11-06 22:33:20,642 INFO L231 Difference]: Finished difference. Result has 235 places, 412 transitions, 8400 flow [2023-11-06 22:33:20,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=8200, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8400, PETRI_PLACES=235, PETRI_TRANSITIONS=412} [2023-11-06 22:33:20,642 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 210 predicate places. [2023-11-06 22:33:20,643 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 412 transitions, 8400 flow [2023-11-06 22:33:20,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:20,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:20,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:20,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:20,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 22:33:20,844 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 22:33:20,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:20,844 INFO L85 PathProgramCache]: Analyzing trace with hash -477630632, now seen corresponding path program 10 times [2023-11-06 22:33:20,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:20,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151691095] [2023-11-06 22:33:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:20,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:21,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:21,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151691095] [2023-11-06 22:33:21,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151691095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:21,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059291198] [2023-11-06 22:33:21,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:33:21,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:21,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:21,600 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:21,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:33:21,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:33:21,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:21,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:33:21,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:22,108 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:33:22,108 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 39 treesize of output 19 [2023-11-06 22:33:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:33:22,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:22,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059291198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:22,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:33:22,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2023-11-06 22:33:22,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880656459] [2023-11-06 22:33:22,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:22,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:33:22,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:22,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:33:22,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:33:22,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 547 [2023-11-06 22:33:22,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 412 transitions, 8400 flow. Second operand has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:22,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:22,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 547 [2023-11-06 22:33:22,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:24,439 INFO L124 PetriNetUnfolderBase]: 2579/4860 cut-off events. [2023-11-06 22:33:24,439 INFO L125 PetriNetUnfolderBase]: For 95776/95776 co-relation queries the response was YES. [2023-11-06 22:33:24,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41123 conditions, 4860 events. 2579/4860 cut-off events. For 95776/95776 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 34942 event pairs, 671 based on Foata normal form. 27/4887 useless extension candidates. Maximal degree in co-relation 41046. Up to 3191 conditions per place. [2023-11-06 22:33:24,491 INFO L140 encePairwiseOnDemand]: 535/547 looper letters, 242 selfloop transitions, 198 changer transitions 10/450 dead transitions. [2023-11-06 22:33:24,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 450 transitions, 9569 flow [2023-11-06 22:33:24,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:33:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:33:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2529 transitions. [2023-11-06 22:33:24,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852833638025594 [2023-11-06 22:33:24,495 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2529 transitions. [2023-11-06 22:33:24,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2529 transitions. [2023-11-06 22:33:24,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:24,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2529 transitions. [2023-11-06 22:33:24,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 210.75) internal successors, (2529), 12 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:24,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 547.0) internal successors, (7111), 13 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:24,500 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 547.0) internal successors, (7111), 13 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:24,500 INFO L175 Difference]: Start difference. First operand has 235 places, 412 transitions, 8400 flow. Second operand 12 states and 2529 transitions. [2023-11-06 22:33:24,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 450 transitions, 9569 flow [2023-11-06 22:33:25,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 450 transitions, 9077 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-11-06 22:33:25,115 INFO L231 Difference]: Finished difference. Result has 231 places, 412 transitions, 8332 flow [2023-11-06 22:33:25,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=7899, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8332, PETRI_PLACES=231, PETRI_TRANSITIONS=412} [2023-11-06 22:33:25,116 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 206 predicate places. [2023-11-06 22:33:25,116 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 412 transitions, 8332 flow [2023-11-06 22:33:25,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:25,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:25,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:25,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:25,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 22:33:25,323 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 22:33:25,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:25,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1998948302, now seen corresponding path program 11 times [2023-11-06 22:33:25,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:25,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250341490] [2023-11-06 22:33:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:25,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:26,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:26,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250341490] [2023-11-06 22:33:26,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250341490] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:26,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903609523] [2023-11-06 22:33:26,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:33:26,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:26,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:26,003 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:26,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 22:33:26,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:33:26,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:26,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:33:26,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:26,279 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 22:33:26,335 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 22:33:26,433 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 22:33:26,761 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:33:26,762 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 39 treesize of output 19 [2023-11-06 22:33:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:26,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:28,228 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:33:28,228 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 47 treesize of output 36 [2023-11-06 22:33:28,248 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-06 22:33:28,249 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 1142 treesize of output 1021 [2023-11-06 22:33:28,275 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:33:28,275 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-11-06 22:33:28,294 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:33:28,294 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-11-06 22:33:28,623 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:33:28,623 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 47 treesize of output 36 [2023-11-06 22:33:28,639 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-06 22:33:28,640 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 278 treesize of output 253 [2023-11-06 22:33:28,656 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:33:28,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-11-06 22:33:28,674 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:33:28,675 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-11-06 22:33:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:29,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903609523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:29,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:29,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2023-11-06 22:33:29,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042188602] [2023-11-06 22:33:29,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:29,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 22:33:29,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 22:33:29,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1110, Unknown=35, NotChecked=0, Total=1332 [2023-11-06 22:33:33,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 547 [2023-11-06 22:33:33,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 412 transitions, 8332 flow. Second operand has 37 states, 37 states have (on average 153.56756756756758) internal successors, (5682), 37 states have internal predecessors, (5682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:33,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:33,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 547 [2023-11-06 22:33:33,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:37,325 INFO L124 PetriNetUnfolderBase]: 2732/5216 cut-off events. [2023-11-06 22:33:37,325 INFO L125 PetriNetUnfolderBase]: For 100559/100559 co-relation queries the response was YES. [2023-11-06 22:33:37,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43662 conditions, 5216 events. 2732/5216 cut-off events. For 100559/100559 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 38681 event pairs, 354 based on Foata normal form. 15/5231 useless extension candidates. Maximal degree in co-relation 43589. Up to 2435 conditions per place. [2023-11-06 22:33:37,378 INFO L140 encePairwiseOnDemand]: 531/547 looper letters, 295 selfloop transitions, 177 changer transitions 58/530 dead transitions. [2023-11-06 22:33:37,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 530 transitions, 10534 flow [2023-11-06 22:33:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:33:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:33:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4410 transitions. [2023-11-06 22:33:37,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28793418647166363 [2023-11-06 22:33:37,383 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4410 transitions. [2023-11-06 22:33:37,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4410 transitions. [2023-11-06 22:33:37,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:37,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4410 transitions. [2023-11-06 22:33:37,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 157.5) internal successors, (4410), 28 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:37,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 547.0) internal successors, (15863), 29 states have internal predecessors, (15863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:37,397 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 547.0) internal successors, (15863), 29 states have internal predecessors, (15863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:37,397 INFO L175 Difference]: Start difference. First operand has 231 places, 412 transitions, 8332 flow. Second operand 28 states and 4410 transitions. [2023-11-06 22:33:37,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 530 transitions, 10534 flow [2023-11-06 22:33:38,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 530 transitions, 10131 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-11-06 22:33:38,042 INFO L231 Difference]: Finished difference. Result has 255 places, 394 transitions, 8070 flow [2023-11-06 22:33:38,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=7959, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8070, PETRI_PLACES=255, PETRI_TRANSITIONS=394} [2023-11-06 22:33:38,043 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 230 predicate places. [2023-11-06 22:33:38,043 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 394 transitions, 8070 flow [2023-11-06 22:33:38,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 153.56756756756758) internal successors, (5682), 37 states have internal predecessors, (5682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:38,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:38,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:38,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:38,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-06 22:33:38,250 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:33:38,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1761963622, now seen corresponding path program 12 times [2023-11-06 22:33:38,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:38,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346719270] [2023-11-06 22:33:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:38,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:38,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:38,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346719270] [2023-11-06 22:33:39,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346719270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:39,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568036084] [2023-11-06 22:33:39,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:33:39,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:39,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:39,001 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:39,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 22:33:39,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-06 22:33:39,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:39,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:33:39,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:39,552 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:33:39,552 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 39 treesize of output 19 [2023-11-06 22:33:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:33:39,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:39,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568036084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:39,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:33:39,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 22 [2023-11-06 22:33:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896232592] [2023-11-06 22:33:39,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:39,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:33:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:33:39,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:33:40,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 547 [2023-11-06 22:33:40,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 394 transitions, 8070 flow. Second operand has 11 states, 11 states have (on average 208.8181818181818) internal successors, (2297), 11 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:40,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:40,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 547 [2023-11-06 22:33:40,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:41,582 INFO L124 PetriNetUnfolderBase]: 2687/5093 cut-off events. [2023-11-06 22:33:41,582 INFO L125 PetriNetUnfolderBase]: For 114102/114102 co-relation queries the response was YES. [2023-11-06 22:33:41,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44352 conditions, 5093 events. 2687/5093 cut-off events. For 114102/114102 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 37278 event pairs, 814 based on Foata normal form. 3/5096 useless extension candidates. Maximal degree in co-relation 44275. Up to 3135 conditions per place. [2023-11-06 22:33:41,637 INFO L140 encePairwiseOnDemand]: 535/547 looper letters, 349 selfloop transitions, 85 changer transitions 7/441 dead transitions. [2023-11-06 22:33:41,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 441 transitions, 9619 flow [2023-11-06 22:33:41,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:33:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:33:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2141 transitions. [2023-11-06 22:33:41,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914076782449726 [2023-11-06 22:33:41,640 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2141 transitions. [2023-11-06 22:33:41,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2141 transitions. [2023-11-06 22:33:41,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:41,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2141 transitions. [2023-11-06 22:33:41,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 214.1) internal successors, (2141), 10 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:41,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:41,645 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:41,645 INFO L175 Difference]: Start difference. First operand has 255 places, 394 transitions, 8070 flow. Second operand 10 states and 2141 transitions. [2023-11-06 22:33:41,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 441 transitions, 9619 flow [2023-11-06 22:33:42,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 441 transitions, 8959 flow, removed 73 selfloop flow, removed 26 redundant places. [2023-11-06 22:33:42,281 INFO L231 Difference]: Finished difference. Result has 226 places, 396 transitions, 7730 flow [2023-11-06 22:33:42,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=7475, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7730, PETRI_PLACES=226, PETRI_TRANSITIONS=396} [2023-11-06 22:33:42,283 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 201 predicate places. [2023-11-06 22:33:42,283 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 396 transitions, 7730 flow [2023-11-06 22:33:42,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 208.8181818181818) internal successors, (2297), 11 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:42,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:42,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:42,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:42,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-06 22:33:42,490 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:33:42,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1941379420, now seen corresponding path program 13 times [2023-11-06 22:33:42,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:42,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240138671] [2023-11-06 22:33:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:42,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:43,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:43,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240138671] [2023-11-06 22:33:43,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240138671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:43,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876273875] [2023-11-06 22:33:43,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:33:43,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:43,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:43,035 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:43,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 22:33:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:43,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 22:33:43,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:43,324 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 22:33:43,379 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 22:33:43,426 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 22:33:43,638 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:33:43,639 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 39 treesize of output 19 [2023-11-06 22:33:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:43,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:44,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876273875] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:44,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:33:44,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 11] total 26 [2023-11-06 22:33:44,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174540954] [2023-11-06 22:33:44,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:44,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:33:44,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:44,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:33:44,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:33:46,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 547 [2023-11-06 22:33:46,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 396 transitions, 7730 flow. Second operand has 11 states, 11 states have (on average 200.8181818181818) internal successors, (2209), 11 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:46,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:46,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 547 [2023-11-06 22:33:46,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:48,777 INFO L124 PetriNetUnfolderBase]: 2675/5081 cut-off events. [2023-11-06 22:33:48,778 INFO L125 PetriNetUnfolderBase]: For 104901/104901 co-relation queries the response was YES. [2023-11-06 22:33:48,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42663 conditions, 5081 events. 2675/5081 cut-off events. For 104901/104901 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 37182 event pairs, 783 based on Foata normal form. 3/5084 useless extension candidates. Maximal degree in co-relation 42589. Up to 3601 conditions per place. [2023-11-06 22:33:48,827 INFO L140 encePairwiseOnDemand]: 535/547 looper letters, 221 selfloop transitions, 187 changer transitions 22/430 dead transitions. [2023-11-06 22:33:48,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 430 transitions, 8807 flow [2023-11-06 22:33:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:33:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:33:48,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2253 transitions. [2023-11-06 22:33:48,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37443908924713315 [2023-11-06 22:33:48,831 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2253 transitions. [2023-11-06 22:33:48,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2253 transitions. [2023-11-06 22:33:48,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:48,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2253 transitions. [2023-11-06 22:33:48,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 204.8181818181818) internal successors, (2253), 11 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:48,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 547.0) internal successors, (6564), 12 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:48,840 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 547.0) internal successors, (6564), 12 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:48,840 INFO L175 Difference]: Start difference. First operand has 226 places, 396 transitions, 7730 flow. Second operand 11 states and 2253 transitions. [2023-11-06 22:33:48,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 430 transitions, 8807 flow [2023-11-06 22:33:49,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 430 transitions, 8645 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-11-06 22:33:49,529 INFO L231 Difference]: Finished difference. Result has 231 places, 382 transitions, 7704 flow [2023-11-06 22:33:49,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=7574, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7704, PETRI_PLACES=231, PETRI_TRANSITIONS=382} [2023-11-06 22:33:49,531 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 206 predicate places. [2023-11-06 22:33:49,531 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 382 transitions, 7704 flow [2023-11-06 22:33:49,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.8181818181818) internal successors, (2209), 11 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:49,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:49,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:49,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:49,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-06 22:33:49,737 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:33:49,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:49,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1045754612, now seen corresponding path program 14 times [2023-11-06 22:33:49,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:49,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584453334] [2023-11-06 22:33:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:49,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:50,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:50,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584453334] [2023-11-06 22:33:50,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584453334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:50,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182821439] [2023-11-06 22:33:50,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:33:50,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:50,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:50,495 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:50,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 22:33:50,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:33:50,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:50,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:33:50,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:50,896 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:33:50,896 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 39 treesize of output 19 [2023-11-06 22:33:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:33:50,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:50,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182821439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:50,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:33:50,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2023-11-06 22:33:50,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003361493] [2023-11-06 22:33:50,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:50,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:33:50,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:50,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:33:50,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:33:51,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 547 [2023-11-06 22:33:51,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 382 transitions, 7704 flow. Second operand has 11 states, 11 states have (on average 207.8181818181818) internal successors, (2286), 11 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:51,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:51,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 547 [2023-11-06 22:33:51,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:52,923 INFO L124 PetriNetUnfolderBase]: 2641/4994 cut-off events. [2023-11-06 22:33:52,923 INFO L125 PetriNetUnfolderBase]: For 106995/106995 co-relation queries the response was YES. [2023-11-06 22:33:52,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42468 conditions, 4994 events. 2641/4994 cut-off events. For 106995/106995 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 36268 event pairs, 785 based on Foata normal form. 3/4997 useless extension candidates. Maximal degree in co-relation 42393. Up to 3595 conditions per place. [2023-11-06 22:33:52,978 INFO L140 encePairwiseOnDemand]: 536/547 looper letters, 208 selfloop transitions, 186 changer transitions 17/411 dead transitions. [2023-11-06 22:33:52,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 411 transitions, 8720 flow [2023-11-06 22:33:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:33:52,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:33:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2117 transitions. [2023-11-06 22:33:52,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870201096892139 [2023-11-06 22:33:52,981 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2117 transitions. [2023-11-06 22:33:52,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2117 transitions. [2023-11-06 22:33:52,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:52,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2117 transitions. [2023-11-06 22:33:52,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 211.7) internal successors, (2117), 10 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:52,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:52,986 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:52,986 INFO L175 Difference]: Start difference. First operand has 231 places, 382 transitions, 7704 flow. Second operand 10 states and 2117 transitions. [2023-11-06 22:33:52,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 411 transitions, 8720 flow [2023-11-06 22:33:53,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 411 transitions, 8326 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-11-06 22:33:53,614 INFO L231 Difference]: Finished difference. Result has 227 places, 375 transitions, 7573 flow [2023-11-06 22:33:53,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=7313, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7573, PETRI_PLACES=227, PETRI_TRANSITIONS=375} [2023-11-06 22:33:53,615 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 202 predicate places. [2023-11-06 22:33:53,615 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 375 transitions, 7573 flow [2023-11-06 22:33:53,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 207.8181818181818) internal successors, (2286), 11 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:53,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:53,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:53,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:53,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 22:33:53,816 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:33:53,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:53,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1430777546, now seen corresponding path program 15 times [2023-11-06 22:33:53,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:53,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574735786] [2023-11-06 22:33:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:53,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:54,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:54,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574735786] [2023-11-06 22:33:54,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574735786] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:54,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057325002] [2023-11-06 22:33:54,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:33:54,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:54,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:54,650 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:54,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 22:33:54,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:33:54,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:54,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:33:54,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:55,028 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:33:55,029 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 39 treesize of output 19 [2023-11-06 22:33:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:33:55,085 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:55,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057325002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:55,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:33:55,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 16 [2023-11-06 22:33:55,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771373420] [2023-11-06 22:33:55,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:55,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:33:55,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:33:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:33:55,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 547 [2023-11-06 22:33:55,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 375 transitions, 7573 flow. Second operand has 11 states, 11 states have (on average 208.8181818181818) internal successors, (2297), 11 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:55,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:55,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 547 [2023-11-06 22:33:55,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:57,261 INFO L124 PetriNetUnfolderBase]: 2618/4925 cut-off events. [2023-11-06 22:33:57,261 INFO L125 PetriNetUnfolderBase]: For 109903/109903 co-relation queries the response was YES. [2023-11-06 22:33:57,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42001 conditions, 4925 events. 2618/4925 cut-off events. For 109903/109903 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 35451 event pairs, 840 based on Foata normal form. 3/4928 useless extension candidates. Maximal degree in co-relation 41927. Up to 3135 conditions per place. [2023-11-06 22:33:57,322 INFO L140 encePairwiseOnDemand]: 535/547 looper letters, 324 selfloop transitions, 79 changer transitions 7/410 dead transitions. [2023-11-06 22:33:57,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 410 transitions, 8821 flow [2023-11-06 22:33:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:33:57,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:33:57,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2134 transitions. [2023-11-06 22:33:57,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390127970749543 [2023-11-06 22:33:57,325 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2134 transitions. [2023-11-06 22:33:57,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2134 transitions. [2023-11-06 22:33:57,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:57,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2134 transitions. [2023-11-06 22:33:57,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 213.4) internal successors, (2134), 10 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:57,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:57,331 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 547.0) internal successors, (6017), 11 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:57,331 INFO L175 Difference]: Start difference. First operand has 227 places, 375 transitions, 7573 flow. Second operand 10 states and 2134 transitions. [2023-11-06 22:33:57,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 410 transitions, 8821 flow [2023-11-06 22:33:58,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 410 transitions, 8416 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-11-06 22:33:58,093 INFO L231 Difference]: Finished difference. Result has 219 places, 376 transitions, 7367 flow [2023-11-06 22:33:58,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=547, PETRI_DIFFERENCE_MINUEND_FLOW=7172, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7367, PETRI_PLACES=219, PETRI_TRANSITIONS=376} [2023-11-06 22:33:58,094 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 194 predicate places. [2023-11-06 22:33:58,094 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 376 transitions, 7367 flow [2023-11-06 22:33:58,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 208.8181818181818) internal successors, (2297), 11 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:33:58,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:58,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:58,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:58,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 22:33:58,301 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:33:58,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:58,301 INFO L85 PathProgramCache]: Analyzing trace with hash 627771682, now seen corresponding path program 16 times [2023-11-06 22:33:58,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:58,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623510988] [2023-11-06 22:33:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:58,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:59,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:59,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623510988] [2023-11-06 22:33:59,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623510988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:59,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527824077] [2023-11-06 22:33:59,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:33:59,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:59,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:59,256 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:59,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c365cebb-38ce-4767-910b-5b7788e34d5d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 22:33:59,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:33:59,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:59,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 22:33:59,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:59,569 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 15 treesize of output 1 [2023-11-06 22:33:59,632 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 22:34:00,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:00,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:34:00,084 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:34:00,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 28 [2023-11-06 22:34:00,261 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:34:00,262 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 39 treesize of output 19 [2023-11-06 22:34:00,320 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 22:34:00,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:00,999 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (select (select |c_#memory_int| c_~a2~0.base) (+ (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) c_~a2~0.offset)))) (let ((.cse0 (< |c_thread1Thread1of1ForFork0_#t~mem3#1| .cse4))) (and (or .cse0 (forall ((v_ArrVal_1248 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1248))) (let ((.cse1 (select (select .cse3 c_~a2~0.base) c_~a2~0.offset)) (.cse2 (select (select .cse3 c_~a1~0.base) c_~a1~0.offset))) (or (= .cse1 .cse2) (< (+ 2147483647 .cse2) .cse1) (< .cse1 .cse2)))))) (<= 1 c_~n2~0) (<= 1 c_~n1~0) (or (< .cse4 |c_thread1Thread1of1ForFork0_#t~mem3#1|) (and (forall ((v_ArrVal_1248 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1248))) (let ((.cse6 (select (select .cse7 c_~a1~0.base) c_~a1~0.offset)) (.cse5 (select (select .cse7 c_~a2~0.base) c_~a2~0.offset))) (or (= .cse5 .cse6) (< (+ .cse5 2147483648) .cse6) (< .cse6 .cse5))))) (or .cse0 (forall ((v_ArrVal_1248 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1248))) (let ((.cse9 (select (select .cse10 c_~a1~0.base) c_~a1~0.offset)) (.cse8 (select (select .cse10 c_~a2~0.base) c_~a2~0.offset))) (or (= .cse8 .cse9) (< (+ .cse8 2147483648) .cse9) (< (+ 2147483647 .cse9) .cse8))))))))))) is different from false [2023-11-06 22:34:02,033 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:34:02,034 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 226 treesize of output 118 [2023-11-06 22:34:02,049 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-06 22:34:02,050 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 1890 treesize of output 1666 [2023-11-06 22:34:02,101 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:34:02,101 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 800 treesize of output 712 [2023-11-06 22:34:02,137 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:34:02,137 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 810 treesize of output 754 [2023-11-06 22:34:07,629 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-06 22:34:07,629 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 226 treesize of output 1 [2023-11-06 22:34:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:34:07,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527824077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:07,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:34:07,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-11-06 22:34:07,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567611088] [2023-11-06 22:34:07,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:07,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 22:34:07,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:07,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 22:34:07,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1088, Unknown=25, NotChecked=68, Total=1332 [2023-11-06 22:34:08,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 547 [2023-11-06 22:34:08,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 376 transitions, 7367 flow. Second operand has 37 states, 37 states have (on average 153.6216216216216) internal successors, (5684), 37 states have internal predecessors, (5684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:34:08,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:34:08,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 547 [2023-11-06 22:34:08,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand