./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/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_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/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_5dbfe6c2-7499-4262-824c-22350626c270/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 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:05:12,793 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:05:12,873 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:05:12,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:05:12,884 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:05:12,931 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:05:12,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:05:12,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:05:12,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:05:12,941 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:05:12,943 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:05:12,944 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:05:12,944 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:05:12,946 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:05:12,947 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:05:12,947 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:05:12,948 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:05:12,948 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:05:12,949 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:05:12,949 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:05:12,950 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:05:12,950 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:05:12,951 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:05:12,951 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:05:12,952 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:05:12,953 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:05:12,953 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:05:12,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:05:12,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:05:12,955 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:05:12,956 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:05:12,956 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:05:12,957 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:05:12,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:05:12,957 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:05:12,957 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:05:12,958 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:05:12,958 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:05:12,958 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:05:12,959 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_5dbfe6c2-7499-4262-824c-22350626c270/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2023-11-06 23:05:13,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:05:13,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:05:13,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:05:13,328 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:05:13,329 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:05:13,330 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2023-11-06 23:05:16,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:05:16,708 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:05:16,709 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2023-11-06 23:05:16,718 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/data/57c33b44b/48153fe24b3343d2a14969510bc89f7b/FLAG90b6234ef [2023-11-06 23:05:16,732 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/data/57c33b44b/48153fe24b3343d2a14969510bc89f7b [2023-11-06 23:05:16,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:05:16,737 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:05:16,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:05:16,740 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:05:16,745 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:05:16,746 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:05:16" (1/1) ... [2023-11-06 23:05:16,747 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@475d7c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:16, skipping insertion in model container [2023-11-06 23:05:16,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:05:16" (1/1) ... [2023-11-06 23:05:16,776 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:05:17,000 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_5dbfe6c2-7499-4262-824c-22350626c270/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2023-11-06 23:05:17,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:05:17,023 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:05:17,055 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_5dbfe6c2-7499-4262-824c-22350626c270/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2023-11-06 23:05:17,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:05:17,068 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:05:17,068 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:05:17,076 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:05:17,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17 WrapperNode [2023-11-06 23:05:17,077 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:05:17,078 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:05:17,078 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:05:17,079 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:05:17,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17" (1/1) ... [2023-11-06 23:05:17,095 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17" (1/1) ... [2023-11-06 23:05:17,122 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 206 [2023-11-06 23:05:17,128 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:05:17,129 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:05:17,129 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:05:17,129 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:05:17,140 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17" (1/1) ... [2023-11-06 23:05:17,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17" (1/1) ... [2023-11-06 23:05:17,145 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17" (1/1) ... [2023-11-06 23:05:17,145 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17" (1/1) ... [2023-11-06 23:05:17,154 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17" (1/1) ... [2023-11-06 23:05:17,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17" (1/1) ... [2023-11-06 23:05:17,161 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17" (1/1) ... [2023-11-06 23:05:17,163 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17" (1/1) ... [2023-11-06 23:05:17,167 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:05:17,168 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:05:17,168 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:05:17,168 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:05:17,169 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17" (1/1) ... [2023-11-06 23:05:17,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:05:17,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:17,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:05:17,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:05:17,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:05:17,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:05:17,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:05:17,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:05:17,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:05:17,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:05:17,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:05:17,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:05:17,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 23:05:17,268 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 23:05:17,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:05:17,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:05:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:05:17,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:05:17,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:05:17,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:05:17,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:05:17,274 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 23:05:17,477 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:05:17,479 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:05:17,977 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:05:18,154 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:05:18,155 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 23:05:18,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:05:18 BoogieIcfgContainer [2023-11-06 23:05:18,158 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:05:18,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:05:18,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:05:18,165 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:05:18,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:05:16" (1/3) ... [2023-11-06 23:05:18,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16405932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:05:18, skipping insertion in model container [2023-11-06 23:05:18,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:17" (2/3) ... [2023-11-06 23:05:18,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16405932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:05:18, skipping insertion in model container [2023-11-06 23:05:18,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:05:18" (3/3) ... [2023-11-06 23:05:18,168 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2023-11-06 23:05:18,185 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:05:18,196 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:05:18,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:05:18,196 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:05:18,302 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:05:18,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 159 transitions, 339 flow [2023-11-06 23:05:18,462 INFO L124 PetriNetUnfolderBase]: 12/156 cut-off events. [2023-11-06 23:05:18,463 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:05:18,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 156 events. 12/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 107 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2023-11-06 23:05:18,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 159 transitions, 339 flow [2023-11-06 23:05:18,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 145 transitions, 308 flow [2023-11-06 23:05:18,480 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:05:18,491 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 145 transitions, 308 flow [2023-11-06 23:05:18,494 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 145 transitions, 308 flow [2023-11-06 23:05:18,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 145 transitions, 308 flow [2023-11-06 23:05:18,535 INFO L124 PetriNetUnfolderBase]: 12/145 cut-off events. [2023-11-06 23:05:18,535 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:05:18,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 12/145 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 108 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2023-11-06 23:05:18,539 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2023-11-06 23:05:24,541 INFO L134 LiptonReduction]: Checked pairs total: 2169 [2023-11-06 23:05:24,541 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-11-06 23:05:24,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:05:24,564 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;@597af1c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:05:24,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 23:05:24,574 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:05:24,574 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-11-06 23:05:24,574 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:05:24,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:24,575 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 23:05:24,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:24,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash 100390464, now seen corresponding path program 1 times [2023-11-06 23:05:24,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:24,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115944275] [2023-11-06 23:05:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:24,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:25,064 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 23:05:25,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:25,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115944275] [2023-11-06 23:05:25,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115944275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:25,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:25,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:05:25,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255355659] [2023-11-06 23:05:25,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:25,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:25,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:25,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:25,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 301 [2023-11-06 23:05:25,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:25,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:25,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 301 [2023-11-06 23:05:25,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:25,404 INFO L124 PetriNetUnfolderBase]: 619/869 cut-off events. [2023-11-06 23:05:25,405 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-11-06 23:05:25,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 869 events. 619/869 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3378 event pairs, 95 based on Foata normal form. 1/584 useless extension candidates. Maximal degree in co-relation 1365. Up to 688 conditions per place. [2023-11-06 23:05:25,416 INFO L140 encePairwiseOnDemand]: 296/301 looper letters, 36 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2023-11-06 23:05:25,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 203 flow [2023-11-06 23:05:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:25,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:05:25,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-11-06 23:05:25,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4983388704318937 [2023-11-06 23:05:25,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-11-06 23:05:25,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-11-06 23:05:25,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:25,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-11-06 23:05:25,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:25,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:25,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:25,455 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 70 flow. Second operand 3 states and 450 transitions. [2023-11-06 23:05:25,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 203 flow [2023-11-06 23:05:25,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 44 transitions, 181 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 23:05:25,463 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 84 flow [2023-11-06 23:05:25,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-11-06 23:05:25,471 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-11-06 23:05:25,471 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 84 flow [2023-11-06 23:05:25,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:25,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:25,472 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, 1] [2023-11-06 23:05:25,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:05:25,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:25,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:25,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1792748457, now seen corresponding path program 1 times [2023-11-06 23:05:25,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:25,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609112952] [2023-11-06 23:05:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:25,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:25,662 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 23:05:25,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:25,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609112952] [2023-11-06 23:05:25,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609112952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:25,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:25,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:05:25,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199899655] [2023-11-06 23:05:25,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:25,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:05:25,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:05:25,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:25,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 301 [2023-11-06 23:05:25,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:25,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:25,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 301 [2023-11-06 23:05:25,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:26,164 INFO L124 PetriNetUnfolderBase]: 1150/1689 cut-off events. [2023-11-06 23:05:26,165 INFO L125 PetriNetUnfolderBase]: For 281/281 co-relation queries the response was YES. [2023-11-06 23:05:26,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3862 conditions, 1689 events. 1150/1689 cut-off events. For 281/281 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 7823 event pairs, 500 based on Foata normal form. 62/1383 useless extension candidates. Maximal degree in co-relation 1017. Up to 880 conditions per place. [2023-11-06 23:05:26,181 INFO L140 encePairwiseOnDemand]: 295/301 looper letters, 59 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2023-11-06 23:05:26,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 66 transitions, 316 flow [2023-11-06 23:05:26,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:05:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:05:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 693 transitions. [2023-11-06 23:05:26,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2023-11-06 23:05:26,189 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 693 transitions. [2023-11-06 23:05:26,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 693 transitions. [2023-11-06 23:05:26,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:26,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 693 transitions. [2023-11-06 23:05:26,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:26,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:26,203 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:26,203 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 84 flow. Second operand 5 states and 693 transitions. [2023-11-06 23:05:26,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 66 transitions, 316 flow [2023-11-06 23:05:26,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 66 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:05:26,209 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 118 flow [2023-11-06 23:05:26,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-11-06 23:05:26,215 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-11-06 23:05:26,215 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 118 flow [2023-11-06 23:05:26,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:26,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:26,216 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, 1, 1] [2023-11-06 23:05:26,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:05:26,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:26,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash 64082056, now seen corresponding path program 1 times [2023-11-06 23:05:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:26,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409298668] [2023-11-06 23:05:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:26,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:26,449 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 23:05:26,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:26,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409298668] [2023-11-06 23:05:26,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409298668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:26,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779660058] [2023-11-06 23:05:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:26,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:26,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:26,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:26,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:05:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:26,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:05:26,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:26,758 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 23:05:26,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:26,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779660058] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:26,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:26,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-06 23:05:26,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449380303] [2023-11-06 23:05:26,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:26,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:05:26,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:26,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:05:26,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:05:26,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 301 [2023-11-06 23:05:26,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:26,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:26,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 301 [2023-11-06 23:05:26,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:27,618 INFO L124 PetriNetUnfolderBase]: 1377/2035 cut-off events. [2023-11-06 23:05:27,619 INFO L125 PetriNetUnfolderBase]: For 1052/1206 co-relation queries the response was YES. [2023-11-06 23:05:27,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5102 conditions, 2035 events. 1377/2035 cut-off events. For 1052/1206 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9587 event pairs, 437 based on Foata normal form. 154/1894 useless extension candidates. Maximal degree in co-relation 3458. Up to 520 conditions per place. [2023-11-06 23:05:27,644 INFO L140 encePairwiseOnDemand]: 291/301 looper letters, 104 selfloop transitions, 24 changer transitions 0/130 dead transitions. [2023-11-06 23:05:27,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 130 transitions, 673 flow [2023-11-06 23:05:27,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:05:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:05:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1305 transitions. [2023-11-06 23:05:27,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335548172757475 [2023-11-06 23:05:27,653 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1305 transitions. [2023-11-06 23:05:27,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1305 transitions. [2023-11-06 23:05:27,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:27,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1305 transitions. [2023-11-06 23:05:27,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 130.5) internal successors, (1305), 10 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:27,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 301.0) internal successors, (3311), 11 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:27,669 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 301.0) internal successors, (3311), 11 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:27,669 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 118 flow. Second operand 10 states and 1305 transitions. [2023-11-06 23:05:27,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 130 transitions, 673 flow [2023-11-06 23:05:27,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 130 transitions, 669 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:05:27,674 INFO L231 Difference]: Finished difference. Result has 49 places, 52 transitions, 279 flow [2023-11-06 23:05:27,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=114, 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=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=279, PETRI_PLACES=49, PETRI_TRANSITIONS=52} [2023-11-06 23:05:27,675 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-11-06 23:05:27,676 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 52 transitions, 279 flow [2023-11-06 23:05:27,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:27,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:27,677 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, 1, 1] [2023-11-06 23:05:27,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:27,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 23:05:27,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:27,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:27,883 INFO L85 PathProgramCache]: Analyzing trace with hash 286593470, now seen corresponding path program 2 times [2023-11-06 23:05:27,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:27,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669360542] [2023-11-06 23:05:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:27,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:28,135 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 23:05:28,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:28,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669360542] [2023-11-06 23:05:28,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669360542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:28,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876835296] [2023-11-06 23:05:28,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:05:28,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:28,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:28,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:28,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:05:28,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:05:28,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:28,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:05:28,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:28,384 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 23:05:28,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:28,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876835296] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:28,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:28,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-06 23:05:28,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179264663] [2023-11-06 23:05:28,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:28,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:05:28,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:28,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:05:28,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:05:28,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 301 [2023-11-06 23:05:28,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 52 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:28,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:28,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 301 [2023-11-06 23:05:28,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:29,304 INFO L124 PetriNetUnfolderBase]: 1639/2417 cut-off events. [2023-11-06 23:05:29,304 INFO L125 PetriNetUnfolderBase]: For 3153/3307 co-relation queries the response was YES. [2023-11-06 23:05:29,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7909 conditions, 2417 events. 1639/2417 cut-off events. For 3153/3307 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 11672 event pairs, 394 based on Foata normal form. 166/2582 useless extension candidates. Maximal degree in co-relation 5734. Up to 594 conditions per place. [2023-11-06 23:05:29,329 INFO L140 encePairwiseOnDemand]: 290/301 looper letters, 111 selfloop transitions, 49 changer transitions 0/162 dead transitions. [2023-11-06 23:05:29,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 162 transitions, 1067 flow [2023-11-06 23:05:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:05:29,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 23:05:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1551 transitions. [2023-11-06 23:05:29,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42940199335548174 [2023-11-06 23:05:29,341 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1551 transitions. [2023-11-06 23:05:29,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1551 transitions. [2023-11-06 23:05:29,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:29,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1551 transitions. [2023-11-06 23:05:29,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 129.25) internal successors, (1551), 12 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:29,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 301.0) internal successors, (3913), 13 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:29,360 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 301.0) internal successors, (3913), 13 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:29,360 INFO L175 Difference]: Start difference. First operand has 49 places, 52 transitions, 279 flow. Second operand 12 states and 1551 transitions. [2023-11-06 23:05:29,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 162 transitions, 1067 flow [2023-11-06 23:05:29,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 162 transitions, 1064 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:05:29,387 INFO L231 Difference]: Finished difference. Result has 65 places, 82 transitions, 641 flow [2023-11-06 23:05:29,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=641, PETRI_PLACES=65, PETRI_TRANSITIONS=82} [2023-11-06 23:05:29,389 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 33 predicate places. [2023-11-06 23:05:29,389 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 82 transitions, 641 flow [2023-11-06 23:05:29,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:29,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:29,390 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, 1, 1] [2023-11-06 23:05:29,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 23:05:29,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:29,601 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:29,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:29,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1237083469, now seen corresponding path program 1 times [2023-11-06 23:05:29,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:29,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487445293] [2023-11-06 23:05:29,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:29,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:29,766 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 23:05:29,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:29,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487445293] [2023-11-06 23:05:29,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487445293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:29,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:29,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:05:29,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850567342] [2023-11-06 23:05:29,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:29,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:05:29,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:29,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:05:29,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:29,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 301 [2023-11-06 23:05:29,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 82 transitions, 641 flow. Second operand has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:29,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:29,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 301 [2023-11-06 23:05:29,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:30,245 INFO L124 PetriNetUnfolderBase]: 1353/2006 cut-off events. [2023-11-06 23:05:30,246 INFO L125 PetriNetUnfolderBase]: For 7190/7360 co-relation queries the response was YES. [2023-11-06 23:05:30,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8323 conditions, 2006 events. 1353/2006 cut-off events. For 7190/7360 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 9671 event pairs, 659 based on Foata normal form. 210/2159 useless extension candidates. Maximal degree in co-relation 6989. Up to 1627 conditions per place. [2023-11-06 23:05:30,270 INFO L140 encePairwiseOnDemand]: 295/301 looper letters, 86 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-11-06 23:05:30,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 97 transitions, 847 flow [2023-11-06 23:05:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:05:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:05:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 694 transitions. [2023-11-06 23:05:30,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611295681063123 [2023-11-06 23:05:30,274 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 694 transitions. [2023-11-06 23:05:30,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 694 transitions. [2023-11-06 23:05:30,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:30,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 694 transitions. [2023-11-06 23:05:30,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:30,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:30,281 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:30,281 INFO L175 Difference]: Start difference. First operand has 65 places, 82 transitions, 641 flow. Second operand 5 states and 694 transitions. [2023-11-06 23:05:30,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 97 transitions, 847 flow [2023-11-06 23:05:30,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 97 transitions, 822 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 23:05:30,307 INFO L231 Difference]: Finished difference. Result has 65 places, 74 transitions, 572 flow [2023-11-06 23:05:30,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=572, PETRI_PLACES=65, PETRI_TRANSITIONS=74} [2023-11-06 23:05:30,308 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 33 predicate places. [2023-11-06 23:05:30,308 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 74 transitions, 572 flow [2023-11-06 23:05:30,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:30,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:30,309 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, 1, 1] [2023-11-06 23:05:30,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:05:30,309 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:30,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:30,309 INFO L85 PathProgramCache]: Analyzing trace with hash -314437488, now seen corresponding path program 3 times [2023-11-06 23:05:30,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:30,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051733402] [2023-11-06 23:05:30,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:30,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:30,468 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 23:05:30,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051733402] [2023-11-06 23:05:30,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051733402] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092557344] [2023-11-06 23:05:30,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:05:30,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:30,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:30,470 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:30,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:05:30,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:05:30,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:30,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:05:30,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:30,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:30,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:30,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092557344] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:30,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:30,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-11-06 23:05:30,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737921593] [2023-11-06 23:05:30,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:30,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:05:30,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:30,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:05:30,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:05:30,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 301 [2023-11-06 23:05:30,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 74 transitions, 572 flow. Second operand has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:30,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:30,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 301 [2023-11-06 23:05:30,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:31,624 INFO L124 PetriNetUnfolderBase]: 1726/2553 cut-off events. [2023-11-06 23:05:31,625 INFO L125 PetriNetUnfolderBase]: For 6827/6925 co-relation queries the response was YES. [2023-11-06 23:05:31,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10525 conditions, 2553 events. 1726/2553 cut-off events. For 6827/6925 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12420 event pairs, 476 based on Foata normal form. 114/2666 useless extension candidates. Maximal degree in co-relation 8953. Up to 979 conditions per place. [2023-11-06 23:05:31,660 INFO L140 encePairwiseOnDemand]: 289/301 looper letters, 104 selfloop transitions, 59 changer transitions 0/165 dead transitions. [2023-11-06 23:05:31,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 165 transitions, 1362 flow [2023-11-06 23:05:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:05:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:05:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1305 transitions. [2023-11-06 23:05:31,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335548172757475 [2023-11-06 23:05:31,667 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1305 transitions. [2023-11-06 23:05:31,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1305 transitions. [2023-11-06 23:05:31,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:31,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1305 transitions. [2023-11-06 23:05:31,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 130.5) internal successors, (1305), 10 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:31,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 301.0) internal successors, (3311), 11 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:31,680 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 301.0) internal successors, (3311), 11 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:31,680 INFO L175 Difference]: Start difference. First operand has 65 places, 74 transitions, 572 flow. Second operand 10 states and 1305 transitions. [2023-11-06 23:05:31,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 165 transitions, 1362 flow [2023-11-06 23:05:31,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 165 transitions, 1301 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-06 23:05:31,726 INFO L231 Difference]: Finished difference. Result has 75 places, 95 transitions, 933 flow [2023-11-06 23:05:31,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=933, PETRI_PLACES=75, PETRI_TRANSITIONS=95} [2023-11-06 23:05:31,729 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 43 predicate places. [2023-11-06 23:05:31,729 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 95 transitions, 933 flow [2023-11-06 23:05:31,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:31,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:31,730 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, 1, 1] [2023-11-06 23:05:31,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:31,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:05:31,946 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:31,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1938453612, now seen corresponding path program 1 times [2023-11-06 23:05:31,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:31,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134450807] [2023-11-06 23:05:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:32,077 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 23:05:32,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:32,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134450807] [2023-11-06 23:05:32,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134450807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:32,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:32,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:05:32,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806118335] [2023-11-06 23:05:32,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:32,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:05:32,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:32,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:05:32,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:32,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 301 [2023-11-06 23:05:32,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 95 transitions, 933 flow. Second operand has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:32,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:32,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 301 [2023-11-06 23:05:32,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:32,610 INFO L124 PetriNetUnfolderBase]: 1450/2141 cut-off events. [2023-11-06 23:05:32,610 INFO L125 PetriNetUnfolderBase]: For 10888/11034 co-relation queries the response was YES. [2023-11-06 23:05:32,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10382 conditions, 2141 events. 1450/2141 cut-off events. For 10888/11034 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10081 event pairs, 677 based on Foata normal form. 160/2292 useless extension candidates. Maximal degree in co-relation 9939. Up to 1992 conditions per place. [2023-11-06 23:05:32,645 INFO L140 encePairwiseOnDemand]: 295/301 looper letters, 80 selfloop transitions, 2 changer transitions 25/111 dead transitions. [2023-11-06 23:05:32,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 111 transitions, 1182 flow [2023-11-06 23:05:32,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:05:32,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:05:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2023-11-06 23:05:32,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2023-11-06 23:05:32,649 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2023-11-06 23:05:32,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2023-11-06 23:05:32,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:32,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2023-11-06 23:05:32,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:32,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:32,659 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:32,659 INFO L175 Difference]: Start difference. First operand has 75 places, 95 transitions, 933 flow. Second operand 5 states and 679 transitions. [2023-11-06 23:05:32,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 111 transitions, 1182 flow [2023-11-06 23:05:32,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 111 transitions, 1127 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-06 23:05:32,704 INFO L231 Difference]: Finished difference. Result has 73 places, 86 transitions, 825 flow [2023-11-06 23:05:32,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=825, PETRI_PLACES=73, PETRI_TRANSITIONS=86} [2023-11-06 23:05:32,705 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 41 predicate places. [2023-11-06 23:05:32,706 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 86 transitions, 825 flow [2023-11-06 23:05:32,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:32,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:32,707 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, 1, 1] [2023-11-06 23:05:32,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:05:32,707 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:32,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:32,708 INFO L85 PathProgramCache]: Analyzing trace with hash 463011134, now seen corresponding path program 4 times [2023-11-06 23:05:32,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:32,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690172151] [2023-11-06 23:05:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:32,871 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 23:05:32,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:32,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690172151] [2023-11-06 23:05:32,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690172151] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:32,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148801674] [2023-11-06 23:05:32,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:05:32,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:32,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:32,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:32,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:05:33,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:05:33,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:33,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:05:33,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:33,109 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 23:05:33,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:33,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148801674] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:33,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:33,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-11-06 23:05:33,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933498826] [2023-11-06 23:05:33,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:33,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:05:33,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:33,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:05:33,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:05:33,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 301 [2023-11-06 23:05:33,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 86 transitions, 825 flow. Second operand has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:33,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:33,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 301 [2023-11-06 23:05:33,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:33,826 INFO L124 PetriNetUnfolderBase]: 1525/2215 cut-off events. [2023-11-06 23:05:33,826 INFO L125 PetriNetUnfolderBase]: For 8364/8364 co-relation queries the response was YES. [2023-11-06 23:05:33,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10624 conditions, 2215 events. 1525/2215 cut-off events. For 8364/8364 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10300 event pairs, 249 based on Foata normal form. 16/2230 useless extension candidates. Maximal degree in co-relation 10589. Up to 772 conditions per place. [2023-11-06 23:05:33,880 INFO L140 encePairwiseOnDemand]: 290/301 looper letters, 81 selfloop transitions, 52 changer transitions 0/134 dead transitions. [2023-11-06 23:05:33,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 134 transitions, 1369 flow [2023-11-06 23:05:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:05:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:05:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1029 transitions. [2023-11-06 23:05:33,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2023-11-06 23:05:33,889 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1029 transitions. [2023-11-06 23:05:33,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1029 transitions. [2023-11-06 23:05:33,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:33,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1029 transitions. [2023-11-06 23:05:33,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 128.625) internal successors, (1029), 8 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:33,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 301.0) internal successors, (2709), 9 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:33,900 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 301.0) internal successors, (2709), 9 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:33,900 INFO L175 Difference]: Start difference. First operand has 73 places, 86 transitions, 825 flow. Second operand 8 states and 1029 transitions. [2023-11-06 23:05:33,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 134 transitions, 1369 flow [2023-11-06 23:05:33,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 134 transitions, 1323 flow, removed 21 selfloop flow, removed 6 redundant places. [2023-11-06 23:05:33,944 INFO L231 Difference]: Finished difference. Result has 71 places, 95 transitions, 1098 flow [2023-11-06 23:05:33,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=71, PETRI_TRANSITIONS=95} [2023-11-06 23:05:33,946 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 39 predicate places. [2023-11-06 23:05:33,946 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 95 transitions, 1098 flow [2023-11-06 23:05:33,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:33,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:33,947 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, 1, 1] [2023-11-06 23:05:33,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:34,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:34,154 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:34,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:34,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1388943588, now seen corresponding path program 5 times [2023-11-06 23:05:34,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:34,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663539704] [2023-11-06 23:05:34,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:34,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:34,327 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 23:05:34,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:34,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663539704] [2023-11-06 23:05:34,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663539704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:34,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525566178] [2023-11-06 23:05:34,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:05:34,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:34,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:34,329 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:34,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:05:34,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:05:34,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:34,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:05:34,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:34,538 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 23:05:34,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:34,629 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 23:05:34,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525566178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:34,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:34,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 23:05:34,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379323482] [2023-11-06 23:05:34,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:34,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:05:34,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:05:34,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:05:34,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 301 [2023-11-06 23:05:34,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 95 transitions, 1098 flow. Second operand has 15 states, 15 states have (on average 117.06666666666666) internal successors, (1756), 15 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:34,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:34,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 301 [2023-11-06 23:05:34,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:36,032 INFO L124 PetriNetUnfolderBase]: 1846/2686 cut-off events. [2023-11-06 23:05:36,032 INFO L125 PetriNetUnfolderBase]: For 14079/14079 co-relation queries the response was YES. [2023-11-06 23:05:36,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13967 conditions, 2686 events. 1846/2686 cut-off events. For 14079/14079 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 11935 event pairs, 250 based on Foata normal form. 14/2699 useless extension candidates. Maximal degree in co-relation 13927. Up to 740 conditions per place. [2023-11-06 23:05:36,059 INFO L140 encePairwiseOnDemand]: 288/301 looper letters, 143 selfloop transitions, 173 changer transitions 0/316 dead transitions. [2023-11-06 23:05:36,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 316 transitions, 3840 flow [2023-11-06 23:05:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 23:05:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 23:05:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2690 transitions. [2023-11-06 23:05:36,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40622168529145275 [2023-11-06 23:05:36,072 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2690 transitions. [2023-11-06 23:05:36,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2690 transitions. [2023-11-06 23:05:36,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:36,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2690 transitions. [2023-11-06 23:05:36,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 122.27272727272727) internal successors, (2690), 22 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:36,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 301.0) internal successors, (6923), 23 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:36,097 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 301.0) internal successors, (6923), 23 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:36,097 INFO L175 Difference]: Start difference. First operand has 71 places, 95 transitions, 1098 flow. Second operand 22 states and 2690 transitions. [2023-11-06 23:05:36,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 316 transitions, 3840 flow [2023-11-06 23:05:36,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 316 transitions, 3659 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-11-06 23:05:36,189 INFO L231 Difference]: Finished difference. Result has 98 places, 218 transitions, 3117 flow [2023-11-06 23:05:36,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3117, PETRI_PLACES=98, PETRI_TRANSITIONS=218} [2023-11-06 23:05:36,190 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 66 predicate places. [2023-11-06 23:05:36,190 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 218 transitions, 3117 flow [2023-11-06 23:05:36,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 117.06666666666666) internal successors, (1756), 15 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:36,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:36,192 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, 1, 1] [2023-11-06 23:05:36,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:36,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:36,397 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:36,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:36,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1906750036, now seen corresponding path program 6 times [2023-11-06 23:05:36,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:36,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998141983] [2023-11-06 23:05:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:36,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:36,556 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 23:05:36,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:36,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998141983] [2023-11-06 23:05:36,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998141983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:36,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875452610] [2023-11-06 23:05:36,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:05:36,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:36,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:36,559 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:36,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:05:36,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 23:05:36,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:36,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:05:36,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:36,785 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 23:05:36,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:36,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875452610] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:36,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:36,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-11-06 23:05:36,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705093282] [2023-11-06 23:05:36,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:36,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:05:36,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:36,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:05:36,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:05:37,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 301 [2023-11-06 23:05:37,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 218 transitions, 3117 flow. Second operand has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:37,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:37,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 301 [2023-11-06 23:05:37,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:37,731 INFO L124 PetriNetUnfolderBase]: 1758/2568 cut-off events. [2023-11-06 23:05:37,732 INFO L125 PetriNetUnfolderBase]: For 18876/18878 co-relation queries the response was YES. [2023-11-06 23:05:37,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15369 conditions, 2568 events. 1758/2568 cut-off events. For 18876/18878 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11406 event pairs, 163 based on Foata normal form. 16/2582 useless extension candidates. Maximal degree in co-relation 15318. Up to 688 conditions per place. [2023-11-06 23:05:37,767 INFO L140 encePairwiseOnDemand]: 291/301 looper letters, 102 selfloop transitions, 148 changer transitions 0/259 dead transitions. [2023-11-06 23:05:37,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 259 transitions, 3788 flow [2023-11-06 23:05:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:05:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:05:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1026 transitions. [2023-11-06 23:05:37,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260797342192691 [2023-11-06 23:05:37,773 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1026 transitions. [2023-11-06 23:05:37,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1026 transitions. [2023-11-06 23:05:37,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:37,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1026 transitions. [2023-11-06 23:05:37,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 128.25) internal successors, (1026), 8 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:37,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 301.0) internal successors, (2709), 9 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:37,784 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 301.0) internal successors, (2709), 9 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:37,784 INFO L175 Difference]: Start difference. First operand has 98 places, 218 transitions, 3117 flow. Second operand 8 states and 1026 transitions. [2023-11-06 23:05:37,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 259 transitions, 3788 flow [2023-11-06 23:05:37,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 259 transitions, 3713 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-11-06 23:05:37,961 INFO L231 Difference]: Finished difference. Result has 106 places, 220 transitions, 3576 flow [2023-11-06 23:05:37,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=3044, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3576, PETRI_PLACES=106, PETRI_TRANSITIONS=220} [2023-11-06 23:05:37,963 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 74 predicate places. [2023-11-06 23:05:37,963 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 220 transitions, 3576 flow [2023-11-06 23:05:37,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:37,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:37,964 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, 1, 1, 1] [2023-11-06 23:05:37,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:38,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:05:38,175 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:38,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:38,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1312493751, now seen corresponding path program 1 times [2023-11-06 23:05:38,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:38,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917991936] [2023-11-06 23:05:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:38,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:38,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:38,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917991936] [2023-11-06 23:05:38,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917991936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:38,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24588640] [2023-11-06 23:05:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:38,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:38,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:38,267 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:38,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:05:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:38,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:05:38,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:38,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:38,511 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 23:05:38,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24588640] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:38,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:38,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-06 23:05:38,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858927278] [2023-11-06 23:05:38,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:38,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:05:38,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:38,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:05:38,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:05:38,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 301 [2023-11-06 23:05:38,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 220 transitions, 3576 flow. Second operand has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:38,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:38,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 301 [2023-11-06 23:05:38,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:39,109 INFO L124 PetriNetUnfolderBase]: 1676/2404 cut-off events. [2023-11-06 23:05:39,110 INFO L125 PetriNetUnfolderBase]: For 30439/30737 co-relation queries the response was YES. [2023-11-06 23:05:39,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15889 conditions, 2404 events. 1676/2404 cut-off events. For 30439/30737 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 10804 event pairs, 366 based on Foata normal form. 312/2636 useless extension candidates. Maximal degree in co-relation 15834. Up to 1836 conditions per place. [2023-11-06 23:05:39,141 INFO L140 encePairwiseOnDemand]: 296/301 looper letters, 262 selfloop transitions, 13 changer transitions 0/293 dead transitions. [2023-11-06 23:05:39,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 293 transitions, 5262 flow [2023-11-06 23:05:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:05:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:05:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 668 transitions. [2023-11-06 23:05:39,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44385382059800665 [2023-11-06 23:05:39,145 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 668 transitions. [2023-11-06 23:05:39,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 668 transitions. [2023-11-06 23:05:39,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:39,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 668 transitions. [2023-11-06 23:05:39,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,153 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,153 INFO L175 Difference]: Start difference. First operand has 106 places, 220 transitions, 3576 flow. Second operand 5 states and 668 transitions. [2023-11-06 23:05:39,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 293 transitions, 5262 flow [2023-11-06 23:05:39,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 293 transitions, 5121 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-06 23:05:39,287 INFO L231 Difference]: Finished difference. Result has 107 places, 221 transitions, 3531 flow [2023-11-06 23:05:39,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=3470, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3531, PETRI_PLACES=107, PETRI_TRANSITIONS=221} [2023-11-06 23:05:39,288 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 75 predicate places. [2023-11-06 23:05:39,288 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 221 transitions, 3531 flow [2023-11-06 23:05:39,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:39,289 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, 1, 1, 1, 1] [2023-11-06 23:05:39,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:39,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:05:39,495 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:39,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:39,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1514958570, now seen corresponding path program 1 times [2023-11-06 23:05:39,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:39,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63034582] [2023-11-06 23:05:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:39,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:40,759 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 23:05:40,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:40,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63034582] [2023-11-06 23:05:40,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63034582] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:40,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014665007] [2023-11-06 23:05:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:40,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:40,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:40,761 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:40,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:05:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:40,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 23:05:40,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:40,957 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 88 treesize of output 84 [2023-11-06 23:05:41,289 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 23:05:41,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 23:05:41,420 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 23:05:41,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:41,697 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:41,697 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 54 treesize of output 38 [2023-11-06 23:05:41,705 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 17 treesize of output 11 [2023-11-06 23:05:42,033 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 23:05:42,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014665007] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:42,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:42,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-11-06 23:05:42,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090069908] [2023-11-06 23:05:42,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:42,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:05:42,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:05:42,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=552, Unknown=1, NotChecked=0, Total=650 [2023-11-06 23:05:43,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 301 [2023-11-06 23:05:43,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 221 transitions, 3531 flow. Second operand has 26 states, 26 states have (on average 80.88461538461539) internal successors, (2103), 26 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:43,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:43,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 301 [2023-11-06 23:05:43,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:45,961 INFO L124 PetriNetUnfolderBase]: 3488/5020 cut-off events. [2023-11-06 23:05:45,961 INFO L125 PetriNetUnfolderBase]: For 49861/50077 co-relation queries the response was YES. [2023-11-06 23:05:46,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33671 conditions, 5020 events. 3488/5020 cut-off events. For 49861/50077 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 24358 event pairs, 297 based on Foata normal form. 159/5160 useless extension candidates. Maximal degree in co-relation 30256. Up to 2732 conditions per place. [2023-11-06 23:05:46,038 INFO L140 encePairwiseOnDemand]: 289/301 looper letters, 547 selfloop transitions, 292 changer transitions 7/854 dead transitions. [2023-11-06 23:05:46,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 854 transitions, 13979 flow [2023-11-06 23:05:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:05:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 23:05:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1545 transitions. [2023-11-06 23:05:46,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3019347273793238 [2023-11-06 23:05:46,045 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1545 transitions. [2023-11-06 23:05:46,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1545 transitions. [2023-11-06 23:05:46,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:46,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1545 transitions. [2023-11-06 23:05:46,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 90.88235294117646) internal successors, (1545), 17 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:46,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 301.0) internal successors, (5418), 18 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:46,061 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 301.0) internal successors, (5418), 18 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:46,061 INFO L175 Difference]: Start difference. First operand has 107 places, 221 transitions, 3531 flow. Second operand 17 states and 1545 transitions. [2023-11-06 23:05:46,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 854 transitions, 13979 flow [2023-11-06 23:05:46,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 854 transitions, 13943 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 23:05:46,583 INFO L231 Difference]: Finished difference. Result has 129 places, 473 transitions, 9121 flow [2023-11-06 23:05:46,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=3512, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9121, PETRI_PLACES=129, PETRI_TRANSITIONS=473} [2023-11-06 23:05:46,584 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 97 predicate places. [2023-11-06 23:05:46,584 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 473 transitions, 9121 flow [2023-11-06 23:05:46,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 80.88461538461539) internal successors, (2103), 26 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:46,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:46,586 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, 1, 1, 1, 1] [2023-11-06 23:05:46,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:46,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:05:46,786 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:46,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:46,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1597521734, now seen corresponding path program 2 times [2023-11-06 23:05:46,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:46,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699443749] [2023-11-06 23:05:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:46,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:48,013 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 23:05:48,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:48,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699443749] [2023-11-06 23:05:48,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699443749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:48,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005963768] [2023-11-06 23:05:48,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:05:48,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:48,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:48,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:48,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:05:48,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:05:48,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:48,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 23:05:48,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:48,471 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 23:05:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:48,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:48,530 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:48,531 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 23 treesize of output 16 [2023-11-06 23:05:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:48,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005963768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:48,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:48,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 23 [2023-11-06 23:05:48,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502776788] [2023-11-06 23:05:48,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:05:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:05:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:05:50,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 301 [2023-11-06 23:05:50,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 473 transitions, 9121 flow. Second operand has 25 states, 25 states have (on average 98.4) internal successors, (2460), 25 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:50,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:50,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 301 [2023-11-06 23:05:50,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:54,717 INFO L124 PetriNetUnfolderBase]: 6220/8856 cut-off events. [2023-11-06 23:05:54,717 INFO L125 PetriNetUnfolderBase]: For 105098/105098 co-relation queries the response was YES. [2023-11-06 23:05:54,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65083 conditions, 8856 events. 6220/8856 cut-off events. For 105098/105098 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 45124 event pairs, 432 based on Foata normal form. 2/8858 useless extension candidates. Maximal degree in co-relation 64183. Up to 5106 conditions per place. [2023-11-06 23:05:54,838 INFO L140 encePairwiseOnDemand]: 287/301 looper letters, 681 selfloop transitions, 698 changer transitions 1/1380 dead transitions. [2023-11-06 23:05:54,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 1380 transitions, 24999 flow [2023-11-06 23:05:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 23:05:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-06 23:05:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4785 transitions. [2023-11-06 23:05:54,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3455871731908132 [2023-11-06 23:05:54,848 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4785 transitions. [2023-11-06 23:05:54,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4785 transitions. [2023-11-06 23:05:54,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:54,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4785 transitions. [2023-11-06 23:05:54,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 104.02173913043478) internal successors, (4785), 46 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:54,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 301.0) internal successors, (14147), 47 states have internal predecessors, (14147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:54,881 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 301.0) internal successors, (14147), 47 states have internal predecessors, (14147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:54,881 INFO L175 Difference]: Start difference. First operand has 129 places, 473 transitions, 9121 flow. Second operand 46 states and 4785 transitions. [2023-11-06 23:05:54,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 1380 transitions, 24999 flow [2023-11-06 23:05:56,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 1380 transitions, 24445 flow, removed 276 selfloop flow, removed 1 redundant places. [2023-11-06 23:05:56,159 INFO L231 Difference]: Finished difference. Result has 200 places, 1073 transitions, 22279 flow [2023-11-06 23:05:56,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=8831, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=22279, PETRI_PLACES=200, PETRI_TRANSITIONS=1073} [2023-11-06 23:05:56,160 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 168 predicate places. [2023-11-06 23:05:56,160 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 1073 transitions, 22279 flow [2023-11-06 23:05:56,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.4) internal successors, (2460), 25 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:56,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:56,161 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, 1, 1, 1, 1] [2023-11-06 23:05:56,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:56,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:05:56,361 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:05:56,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:56,362 INFO L85 PathProgramCache]: Analyzing trace with hash 85405805, now seen corresponding path program 1 times [2023-11-06 23:05:56,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:56,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076033980] [2023-11-06 23:05:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:56,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:57,115 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 23:05:57,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:57,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076033980] [2023-11-06 23:05:57,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076033980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:57,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398260667] [2023-11-06 23:05:57,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:57,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:57,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:57,118 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:57,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:05:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:57,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 23:05:57,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:57,305 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 23:05:57,351 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 23:05:57,443 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 23:05:57,491 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 23:05:57,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 23:05:57,554 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 23:05:57,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:57,644 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_385 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_385) c_~A~0.base))) (= (+ c_~res1~0 (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) (+ c_~res2~0 (select .cse0 c_~A~0.offset))))) is different from false [2023-11-06 23:05:57,667 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int)) (v_ArrVal_385 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_385) c_~A~0.base))) (= (+ c_~res2~0 (select .cse0 c_~A~0.offset)) (+ c_~res1~0 (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)))))) is different from false [2023-11-06 23:05:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:57,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398260667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:57,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:57,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 21 [2023-11-06 23:05:57,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516056262] [2023-11-06 23:05:57,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:57,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 23:05:57,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:57,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 23:05:57,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=344, Unknown=2, NotChecked=78, Total=506 [2023-11-06 23:05:57,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 301 [2023-11-06 23:05:57,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 1073 transitions, 22279 flow. Second operand has 23 states, 23 states have (on average 93.0) internal successors, (2139), 23 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:57,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:57,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 301 [2023-11-06 23:05:57,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:03,126 INFO L124 PetriNetUnfolderBase]: 8908/12649 cut-off events. [2023-11-06 23:06:03,126 INFO L125 PetriNetUnfolderBase]: For 213437/213862 co-relation queries the response was YES. [2023-11-06 23:06:03,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106103 conditions, 12649 events. 8908/12649 cut-off events. For 213437/213862 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 69451 event pairs, 635 based on Foata normal form. 290/12831 useless extension candidates. Maximal degree in co-relation 105543. Up to 7953 conditions per place. [2023-11-06 23:06:03,350 INFO L140 encePairwiseOnDemand]: 288/301 looper letters, 1045 selfloop transitions, 670 changer transitions 1/1743 dead transitions. [2023-11-06 23:06:03,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 1743 transitions, 38517 flow [2023-11-06 23:06:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:06:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:06:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1323 transitions. [2023-11-06 23:06:03,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33810375670840787 [2023-11-06 23:06:03,355 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1323 transitions. [2023-11-06 23:06:03,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1323 transitions. [2023-11-06 23:06:03,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:03,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1323 transitions. [2023-11-06 23:06:03,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 101.76923076923077) internal successors, (1323), 13 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:03,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 301.0) internal successors, (4214), 14 states have internal predecessors, (4214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:03,365 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 301.0) internal successors, (4214), 14 states have internal predecessors, (4214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:03,366 INFO L175 Difference]: Start difference. First operand has 200 places, 1073 transitions, 22279 flow. Second operand 13 states and 1323 transitions. [2023-11-06 23:06:03,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 1743 transitions, 38517 flow [2023-11-06 23:06:07,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 1743 transitions, 37074 flow, removed 660 selfloop flow, removed 4 redundant places. [2023-11-06 23:06:07,171 INFO L231 Difference]: Finished difference. Result has 216 places, 1469 transitions, 32258 flow [2023-11-06 23:06:07,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=21217, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=32258, PETRI_PLACES=216, PETRI_TRANSITIONS=1469} [2023-11-06 23:06:07,172 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 184 predicate places. [2023-11-06 23:06:07,173 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 1469 transitions, 32258 flow [2023-11-06 23:06:07,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 93.0) internal successors, (2139), 23 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:07,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:07,173 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, 1, 1, 1, 1] [2023-11-06 23:06:07,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-06 23:06:07,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:06:07,376 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:06:07,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1256789785, now seen corresponding path program 2 times [2023-11-06 23:06:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530429066] [2023-11-06 23:06:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:07,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:08,321 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 23:06:08,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:08,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530429066] [2023-11-06 23:06:08,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530429066] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:08,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963008681] [2023-11-06 23:06:08,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:06:08,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:08,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:08,324 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:08,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:06:08,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:06:08,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:08,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 23:06:08,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:08,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:08,652 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 23:06:08,701 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 23:06:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:08,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:08,869 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:08,870 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 46 treesize of output 34 [2023-11-06 23:06:08,875 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 13 treesize of output 11 [2023-11-06 23:06:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:08,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963008681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:08,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:08,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2023-11-06 23:06:08,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901308739] [2023-11-06 23:06:08,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:08,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 23:06:08,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:08,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 23:06:08,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=418, Unknown=4, NotChecked=0, Total=506 [2023-11-06 23:06:09,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 301 [2023-11-06 23:06:09,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 1469 transitions, 32258 flow. Second operand has 23 states, 23 states have (on average 93.17391304347827) internal successors, (2143), 23 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:09,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:09,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 301 [2023-11-06 23:06:09,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:18,239 INFO L124 PetriNetUnfolderBase]: 10650/15134 cut-off events. [2023-11-06 23:06:18,239 INFO L125 PetriNetUnfolderBase]: For 280865/281394 co-relation queries the response was YES. [2023-11-06 23:06:18,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132632 conditions, 15134 events. 10650/15134 cut-off events. For 280865/281394 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 85613 event pairs, 686 based on Foata normal form. 361/15360 useless extension candidates. Maximal degree in co-relation 131725. Up to 8127 conditions per place. [2023-11-06 23:06:18,527 INFO L140 encePairwiseOnDemand]: 289/301 looper letters, 975 selfloop transitions, 980 changer transitions 2/1984 dead transitions. [2023-11-06 23:06:18,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 1984 transitions, 45702 flow [2023-11-06 23:06:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:06:18,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 23:06:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1527 transitions. [2023-11-06 23:06:18,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3382059800664452 [2023-11-06 23:06:18,531 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1527 transitions. [2023-11-06 23:06:18,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1527 transitions. [2023-11-06 23:06:18,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:18,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1527 transitions. [2023-11-06 23:06:18,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 101.8) internal successors, (1527), 15 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:18,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 301.0) internal successors, (4816), 16 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:18,542 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 301.0) internal successors, (4816), 16 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:18,542 INFO L175 Difference]: Start difference. First operand has 216 places, 1469 transitions, 32258 flow. Second operand 15 states and 1527 transitions. [2023-11-06 23:06:18,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 1984 transitions, 45702 flow [2023-11-06 23:06:23,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 1984 transitions, 45383 flow, removed 157 selfloop flow, removed 2 redundant places. [2023-11-06 23:06:23,800 INFO L231 Difference]: Finished difference. Result has 236 places, 1729 transitions, 41217 flow [2023-11-06 23:06:23,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=31997, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=763, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=41217, PETRI_PLACES=236, PETRI_TRANSITIONS=1729} [2023-11-06 23:06:23,802 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 204 predicate places. [2023-11-06 23:06:23,802 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 1729 transitions, 41217 flow [2023-11-06 23:06:23,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 93.17391304347827) internal successors, (2143), 23 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:23,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:23,803 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, 1, 1, 1, 1] [2023-11-06 23:06:23,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:24,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:24,003 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:06:24,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash -257021878, now seen corresponding path program 3 times [2023-11-06 23:06:24,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:24,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799115101] [2023-11-06 23:06:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:24,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:25,003 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 23:06:25,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:25,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799115101] [2023-11-06 23:06:25,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799115101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:25,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206219474] [2023-11-06 23:06:25,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:06:25,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:25,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:25,005 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:25,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:06:25,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:06:25,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:25,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 23:06:25,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:25,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 23:06:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:25,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:25,525 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:25,526 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 23 treesize of output 16 [2023-11-06 23:06:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:25,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206219474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:25,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:25,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 23 [2023-11-06 23:06:25,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021480013] [2023-11-06 23:06:25,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:25,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:06:25,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:25,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:06:25,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:06:27,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 301 [2023-11-06 23:06:27,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 1729 transitions, 41217 flow. Second operand has 25 states, 25 states have (on average 98.4) internal successors, (2460), 25 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:27,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:27,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 301 [2023-11-06 23:06:27,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:41,906 INFO L124 PetriNetUnfolderBase]: 14524/20797 cut-off events. [2023-11-06 23:06:41,907 INFO L125 PetriNetUnfolderBase]: For 467323/467323 co-relation queries the response was YES. [2023-11-06 23:06:42,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194703 conditions, 20797 events. 14524/20797 cut-off events. For 467323/467323 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 123677 event pairs, 1345 based on Foata normal form. 2/20799 useless extension candidates. Maximal degree in co-relation 193833. Up to 14733 conditions per place. [2023-11-06 23:06:42,369 INFO L140 encePairwiseOnDemand]: 286/301 looper letters, 1462 selfloop transitions, 1478 changer transitions 2/2942 dead transitions. [2023-11-06 23:06:42,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 2942 transitions, 72004 flow [2023-11-06 23:06:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-06 23:06:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-06 23:06:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4704 transitions. [2023-11-06 23:06:42,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34728682170542635 [2023-11-06 23:06:42,377 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4704 transitions. [2023-11-06 23:06:42,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4704 transitions. [2023-11-06 23:06:42,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:42,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4704 transitions. [2023-11-06 23:06:42,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 104.53333333333333) internal successors, (4704), 45 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:42,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 301.0) internal successors, (13846), 46 states have internal predecessors, (13846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:42,408 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 301.0) internal successors, (13846), 46 states have internal predecessors, (13846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:42,408 INFO L175 Difference]: Start difference. First operand has 236 places, 1729 transitions, 41217 flow. Second operand 45 states and 4704 transitions. [2023-11-06 23:06:42,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 2942 transitions, 72004 flow [2023-11-06 23:06:52,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 2942 transitions, 71694 flow, removed 116 selfloop flow, removed 3 redundant places. [2023-11-06 23:06:52,459 INFO L231 Difference]: Finished difference. Result has 301 places, 2604 transitions, 67247 flow [2023-11-06 23:06:52,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=40929, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=705, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=67247, PETRI_PLACES=301, PETRI_TRANSITIONS=2604} [2023-11-06 23:06:52,462 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 269 predicate places. [2023-11-06 23:06:52,462 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 2604 transitions, 67247 flow [2023-11-06 23:06:52,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.4) internal successors, (2460), 25 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:52,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:52,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:52,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:52,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:06:52,670 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:06:52,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:52,670 INFO L85 PathProgramCache]: Analyzing trace with hash -314088423, now seen corresponding path program 3 times [2023-11-06 23:06:52,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:52,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72116786] [2023-11-06 23:06:52,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:52,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:53,402 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 23:06:53,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:53,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72116786] [2023-11-06 23:06:53,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72116786] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:53,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999010915] [2023-11-06 23:06:53,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:06:53,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:53,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:53,409 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:53,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dbfe6c2-7499-4262-824c-22350626c270/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:06:53,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:06:53,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:53,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:06:53,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:53,676 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 23:06:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:53,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:53,751 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:53,751 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 23 treesize of output 16 [2023-11-06 23:06:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:53,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999010915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:53,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:53,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 16 [2023-11-06 23:06:53,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749517119] [2023-11-06 23:06:53,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:53,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:06:53,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:53,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:06:53,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:06:54,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 301 [2023-11-06 23:06:54,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 2604 transitions, 67247 flow. Second operand has 18 states, 18 states have (on average 112.55555555555556) internal successors, (2026), 18 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:54,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:54,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 301 [2023-11-06 23:06:54,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:17,091 INFO L124 PetriNetUnfolderBase]: 16278/23211 cut-off events. [2023-11-06 23:07:17,092 INFO L125 PetriNetUnfolderBase]: For 642804/643680 co-relation queries the response was YES. [2023-11-06 23:07:17,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235315 conditions, 23211 events. 16278/23211 cut-off events. For 642804/643680 co-relation queries the response was YES. Maximal size of possible extension queue 1216. Compared 141633 event pairs, 1936 based on Foata normal form. 630/23631 useless extension candidates. Maximal degree in co-relation 234514. Up to 19729 conditions per place. [2023-11-06 23:07:17,714 INFO L140 encePairwiseOnDemand]: 289/301 looper letters, 2547 selfloop transitions, 583 changer transitions 1/3167 dead transitions. [2023-11-06 23:07:17,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 3167 transitions, 85424 flow [2023-11-06 23:07:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:07:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 23:07:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1674 transitions. [2023-11-06 23:07:17,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972472710014238 [2023-11-06 23:07:17,718 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1674 transitions. [2023-11-06 23:07:17,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1674 transitions. [2023-11-06 23:07:17,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:17,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1674 transitions. [2023-11-06 23:07:17,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 119.57142857142857) internal successors, (1674), 14 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:17,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 301.0) internal successors, (4515), 15 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:17,727 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 301.0) internal successors, (4515), 15 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:17,727 INFO L175 Difference]: Start difference. First operand has 301 places, 2604 transitions, 67247 flow. Second operand 14 states and 1674 transitions. [2023-11-06 23:07:17,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 3167 transitions, 85424 flow