./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --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 389f5b7d6579b5ac06564f3c82f3f69fea502868b761df6187d49f96e1a317cd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:59:09,925 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:59:09,983 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:59:09,988 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:59:09,988 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:59:10,010 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:59:10,011 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:59:10,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:59:10,012 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:59:10,013 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:59:10,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:59:10,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:59:10,015 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:59:10,015 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:59:10,016 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:59:10,017 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:59:10,017 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:59:10,018 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:59:10,018 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:59:10,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:59:10,019 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:59:10,020 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:59:10,020 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:59:10,021 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:59:10,021 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:59:10,021 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:59:10,022 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:59:10,022 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:59:10,023 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:59:10,023 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:59:10,024 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:59:10,024 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:59:10,025 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:59:10,025 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:59:10,025 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:59:10,025 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:59:10,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:59:10,026 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:59:10,026 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:59:10,026 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:59:10,027 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:59:10,027 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:59:10,027 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_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f5b7d6579b5ac06564f3c82f3f69fea502868b761df6187d49f96e1a317cd [2023-11-29 01:59:10,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:59:10,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:59:10,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:59:10,252 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:59:10,253 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:59:10,254 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i [2023-11-29 01:59:12,917 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:59:13,178 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:59:13,178 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i [2023-11-29 01:59:13,193 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/data/8acf47a17/4851487ac72445398547dcccc3428628/FLAGa667cbda7 [2023-11-29 01:59:13,205 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/data/8acf47a17/4851487ac72445398547dcccc3428628 [2023-11-29 01:59:13,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:59:13,209 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:59:13,210 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:59:13,211 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:59:13,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:59:13,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,221 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc4b070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13, skipping insertion in model container [2023-11-29 01:59:13,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,267 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:59:13,532 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_84b1878e-e2e4-4745-871c-fafd7badfcf9/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] [2023-11-29 01:59:13,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:59:13,553 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:59:13,589 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_84b1878e-e2e4-4745-871c-fafd7badfcf9/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] [2023-11-29 01:59:13,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:59:13,631 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:59:13,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13 WrapperNode [2023-11-29 01:59:13,632 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:59:13,633 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:59:13,633 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:59:13,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:59:13,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,674 INFO L138 Inliner]: procedures = 163, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2023-11-29 01:59:13,674 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:59:13,675 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:59:13,675 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:59:13,675 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:59:13,686 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,689 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,703 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2023-11-29 01:59:13,703 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,703 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,709 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,712 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,714 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,715 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,718 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:59:13,719 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:59:13,719 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:59:13,719 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:59:13,720 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (1/1) ... [2023-11-29 01:59:13,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:59:13,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:13,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:59:13,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b1878e-e2e4-4745-871c-fafd7badfcf9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:59:13,791 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-29 01:59:13,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-29 01:59:13,792 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-29 01:59:13,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-29 01:59:13,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:59:13,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:59:13,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:59:13,792 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 01:59:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:59:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:59:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:59:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:59:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:59:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:59:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 01:59:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:59:13,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:59:13,796 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 01:59:13,926 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:59:13,927 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:59:14,047 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:59:14,152 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:59:14,152 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 01:59:14,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:59:14 BoogieIcfgContainer [2023-11-29 01:59:14,153 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:59:14,155 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:59:14,155 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:59:14,158 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:59:14,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:59:13" (1/3) ... [2023-11-29 01:59:14,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386db2c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:59:14, skipping insertion in model container [2023-11-29 01:59:14,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:13" (2/3) ... [2023-11-29 01:59:14,160 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386db2c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:59:14, skipping insertion in model container [2023-11-29 01:59:14,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:59:14" (3/3) ... [2023-11-29 01:59:14,161 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs-pthread.i [2023-11-29 01:59:14,168 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 01:59:14,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:59:14,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:59:14,176 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 01:59:14,209 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:59:14,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 62 flow [2023-11-29 01:59:14,262 INFO L124 PetriNetUnfolderBase]: 3/28 cut-off events. [2023-11-29 01:59:14,262 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:59:14,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 3/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 59 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2023-11-29 01:59:14,266 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 62 flow [2023-11-29 01:59:14,269 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 59 flow [2023-11-29 01:59:14,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:59:14,284 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@abb4f39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:59:14,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 01:59:14,292 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:59:14,292 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-11-29 01:59:14,292 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:59:14,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:14,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:14,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 01:59:14,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:14,299 INFO L85 PathProgramCache]: Analyzing trace with hash 696116038, now seen corresponding path program 1 times [2023-11-29 01:59:14,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:14,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323489006] [2023-11-29 01:59:14,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:14,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:59:14,412 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:59:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:59:14,470 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:59:14,472 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:59:14,473 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-29 01:59:14,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-29 01:59:14,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-29 01:59:14,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-29 01:59:14,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:59:14,476 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-29 01:59:14,480 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:59:14,480 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 01:59:14,503 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:59:14,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 47 transitions, 114 flow [2023-11-29 01:59:14,517 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2023-11-29 01:59:14,517 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 01:59:14,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 39 events. 4/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 46. Up to 3 conditions per place. [2023-11-29 01:59:14,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 47 transitions, 114 flow [2023-11-29 01:59:14,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 81 flow [2023-11-29 01:59:14,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:59:14,522 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@abb4f39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:59:14,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-29 01:59:14,529 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:59:14,529 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-29 01:59:14,530 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 01:59:14,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:14,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:14,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 01:59:14,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:14,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1929670610, now seen corresponding path program 1 times [2023-11-29 01:59:14,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:14,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995609455] [2023-11-29 01:59:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:14,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:14,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:14,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995609455] [2023-11-29 01:59:14,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995609455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:14,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:14,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:59:14,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624530237] [2023-11-29 01:59:14,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:14,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:14,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:14,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:14,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:14,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2023-11-29 01:59:14,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:14,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:14,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2023-11-29 01:59:14,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:15,057 INFO L124 PetriNetUnfolderBase]: 1203/2092 cut-off events. [2023-11-29 01:59:15,057 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-29 01:59:15,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3877 conditions, 2092 events. 1203/2092 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12180 event pairs, 303 based on Foata normal form. 637/2623 useless extension candidates. Maximal degree in co-relation 3866. Up to 1003 conditions per place. [2023-11-29 01:59:15,077 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 25 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2023-11-29 01:59:15,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 158 flow [2023-11-29 01:59:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2023-11-29 01:59:15,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2023-11-29 01:59:15,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 93 transitions. [2023-11-29 01:59:15,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 93 transitions. [2023-11-29 01:59:15,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:15,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 93 transitions. [2023-11-29 01:59:15,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:15,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:15,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:15,097 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 81 flow. Second operand 3 states and 93 transitions. [2023-11-29 01:59:15,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 158 flow [2023-11-29 01:59:15,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:15,102 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 100 flow [2023-11-29 01:59:15,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-29 01:59:15,107 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-29 01:59:15,107 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 100 flow [2023-11-29 01:59:15,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:15,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:15,108 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:15,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:59:15,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 01:59:15,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:15,109 INFO L85 PathProgramCache]: Analyzing trace with hash -840457477, now seen corresponding path program 1 times [2023-11-29 01:59:15,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:15,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057849859] [2023-11-29 01:59:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:15,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:59:15,134 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:59:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:59:15,154 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:59:15,155 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:59:15,155 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-29 01:59:15,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-29 01:59:15,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-11-29 01:59:15,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-29 01:59:15,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-29 01:59:15,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:59:15,157 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-29 01:59:15,157 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:59:15,157 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 01:59:15,184 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:59:15,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 67 transitions, 170 flow [2023-11-29 01:59:15,192 INFO L124 PetriNetUnfolderBase]: 5/50 cut-off events. [2023-11-29 01:59:15,193 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 01:59:15,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 50 events. 5/50 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 117 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 61. Up to 4 conditions per place. [2023-11-29 01:59:15,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 67 transitions, 170 flow [2023-11-29 01:59:15,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 42 transitions, 105 flow [2023-11-29 01:59:15,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:59:15,196 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@abb4f39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:59:15,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-29 01:59:15,199 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:59:15,200 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-29 01:59:15,200 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 01:59:15,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:15,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:15,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-29 01:59:15,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:15,201 INFO L85 PathProgramCache]: Analyzing trace with hash -30622235, now seen corresponding path program 1 times [2023-11-29 01:59:15,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:15,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066507809] [2023-11-29 01:59:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:15,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:15,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:15,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066507809] [2023-11-29 01:59:15,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066507809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:15,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:15,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:59:15,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981620831] [2023-11-29 01:59:15,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:15,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:15,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:15,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:15,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-29 01:59:15,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:15,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:15,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-29 01:59:15,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:16,524 INFO L124 PetriNetUnfolderBase]: 6995/10829 cut-off events. [2023-11-29 01:59:16,524 INFO L125 PetriNetUnfolderBase]: For 1042/1042 co-relation queries the response was YES. [2023-11-29 01:59:16,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20460 conditions, 10829 events. 6995/10829 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 71206 event pairs, 1712 based on Foata normal form. 3676/13964 useless extension candidates. Maximal degree in co-relation 20448. Up to 5767 conditions per place. [2023-11-29 01:59:16,652 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 32 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-29 01:59:16,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 211 flow [2023-11-29 01:59:16,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2023-11-29 01:59:16,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318407960199005 [2023-11-29 01:59:16,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 127 transitions. [2023-11-29 01:59:16,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 127 transitions. [2023-11-29 01:59:16,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:16,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 127 transitions. [2023-11-29 01:59:16,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:16,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:16,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:16,658 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 105 flow. Second operand 3 states and 127 transitions. [2023-11-29 01:59:16,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 211 flow [2023-11-29 01:59:16,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 206 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:16,663 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 128 flow [2023-11-29 01:59:16,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-29 01:59:16,664 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-29 01:59:16,665 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 128 flow [2023-11-29 01:59:16,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:16,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:16,665 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:16,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 01:59:16,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-29 01:59:16,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:16,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1206549461, now seen corresponding path program 1 times [2023-11-29 01:59:16,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:16,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952369611] [2023-11-29 01:59:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:16,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:59:16,690 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:59:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:59:16,710 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:59:16,710 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:59:16,711 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-29 01:59:16,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-29 01:59:16,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-29 01:59:16,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-29 01:59:16,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-29 01:59:16,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-29 01:59:16,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 01:59:16,712 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-29 01:59:16,713 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:59:16,713 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 01:59:16,748 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:59:16,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 87 transitions, 230 flow [2023-11-29 01:59:16,759 INFO L124 PetriNetUnfolderBase]: 6/61 cut-off events. [2023-11-29 01:59:16,759 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-29 01:59:16,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 61 events. 6/61 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 77. Up to 5 conditions per place. [2023-11-29 01:59:16,759 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 87 transitions, 230 flow [2023-11-29 01:59:16,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 50 transitions, 131 flow [2023-11-29 01:59:16,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:59:16,763 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@abb4f39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:59:16,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-29 01:59:16,766 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:59:16,766 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-29 01:59:16,766 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 01:59:16,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:16,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:16,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 01:59:16,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:16,767 INFO L85 PathProgramCache]: Analyzing trace with hash -7155176, now seen corresponding path program 1 times [2023-11-29 01:59:16,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:16,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404952974] [2023-11-29 01:59:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:16,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:16,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:16,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404952974] [2023-11-29 01:59:16,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404952974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:16,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:16,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:59:16,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412777159] [2023-11-29 01:59:16,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:16,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:16,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:16,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:16,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:16,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 87 [2023-11-29 01:59:16,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:16,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:16,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 87 [2023-11-29 01:59:16,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:21,266 INFO L124 PetriNetUnfolderBase]: 36336/51943 cut-off events. [2023-11-29 01:59:21,266 INFO L125 PetriNetUnfolderBase]: For 7732/7732 co-relation queries the response was YES. [2023-11-29 01:59:21,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99668 conditions, 51943 events. 36336/51943 cut-off events. For 7732/7732 co-relation queries the response was YES. Maximal size of possible extension queue 2132. Compared 362411 event pairs, 9261 based on Foata normal form. 18923/68409 useless extension candidates. Maximal degree in co-relation 99655. Up to 29392 conditions per place. [2023-11-29 01:59:21,539 INFO L140 encePairwiseOnDemand]: 73/87 looper letters, 39 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2023-11-29 01:59:21,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 268 flow [2023-11-29 01:59:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-29 01:59:21,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168582375478927 [2023-11-29 01:59:21,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-29 01:59:21,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-29 01:59:21,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:21,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-29 01:59:21,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:21,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:21,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:21,545 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 131 flow. Second operand 3 states and 161 transitions. [2023-11-29 01:59:21,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 268 flow [2023-11-29 01:59:21,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 255 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:21,552 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 156 flow [2023-11-29 01:59:21,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-11-29 01:59:21,553 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2023-11-29 01:59:21,553 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 156 flow [2023-11-29 01:59:21,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:21,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:21,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:21,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 01:59:21,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 01:59:21,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash 559767437, now seen corresponding path program 1 times [2023-11-29 01:59:21,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:21,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298303186] [2023-11-29 01:59:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:21,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:21,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:21,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298303186] [2023-11-29 01:59:21,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298303186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:21,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:21,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:59:21,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280777270] [2023-11-29 01:59:21,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:21,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:59:21,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:21,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:59:21,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:59:21,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 87 [2023-11-29 01:59:21,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:21,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:21,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 87 [2023-11-29 01:59:21,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:26,758 INFO L124 PetriNetUnfolderBase]: 43697/64263 cut-off events. [2023-11-29 01:59:26,759 INFO L125 PetriNetUnfolderBase]: For 19140/19140 co-relation queries the response was YES. [2023-11-29 01:59:26,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139006 conditions, 64263 events. 43697/64263 cut-off events. For 19140/19140 co-relation queries the response was YES. Maximal size of possible extension queue 2791. Compared 487035 event pairs, 5040 based on Foata normal form. 372/63195 useless extension candidates. Maximal degree in co-relation 138990. Up to 31321 conditions per place. [2023-11-29 01:59:27,283 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 52 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2023-11-29 01:59:27,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 84 transitions, 420 flow [2023-11-29 01:59:27,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:59:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:59:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 198 transitions. [2023-11-29 01:59:27,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2023-11-29 01:59:27,285 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 198 transitions. [2023-11-29 01:59:27,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 198 transitions. [2023-11-29 01:59:27,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:27,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 198 transitions. [2023-11-29 01:59:27,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:27,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:27,288 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:27,288 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 156 flow. Second operand 4 states and 198 transitions. [2023-11-29 01:59:27,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 84 transitions, 420 flow [2023-11-29 01:59:27,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:59:27,328 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 243 flow [2023-11-29 01:59:27,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2023-11-29 01:59:27,328 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2023-11-29 01:59:27,329 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 243 flow [2023-11-29 01:59:27,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:27,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:27,329 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:27,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 01:59:27,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 01:59:27,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:27,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1704109330, now seen corresponding path program 1 times [2023-11-29 01:59:27,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:27,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543995609] [2023-11-29 01:59:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:27,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:59:27,350 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:59:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:59:27,368 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:59:27,368 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:59:27,369 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-29 01:59:27,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-29 01:59:27,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-29 01:59:27,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-29 01:59:27,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-29 01:59:27,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-29 01:59:27,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-29 01:59:27,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 01:59:27,371 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 01:59:27,371 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:59:27,371 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-29 01:59:27,408 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:59:27,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 107 transitions, 294 flow [2023-11-29 01:59:27,418 INFO L124 PetriNetUnfolderBase]: 7/72 cut-off events. [2023-11-29 01:59:27,418 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-29 01:59:27,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 72 events. 7/72 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2023-11-29 01:59:27,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 107 transitions, 294 flow [2023-11-29 01:59:27,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 58 transitions, 159 flow [2023-11-29 01:59:27,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:59:27,421 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@abb4f39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:59:27,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-29 01:59:27,424 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:59:27,424 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-29 01:59:27,425 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 01:59:27,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:27,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:27,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-29 01:59:27,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:27,426 INFO L85 PathProgramCache]: Analyzing trace with hash 698399723, now seen corresponding path program 1 times [2023-11-29 01:59:27,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:27,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868444193] [2023-11-29 01:59:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:27,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:27,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868444193] [2023-11-29 01:59:27,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868444193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:27,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:27,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:59:27,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705010941] [2023-11-29 01:59:27,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:27,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:27,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:27,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:27,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:27,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 107 [2023-11-29 01:59:27,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:27,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:27,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 107 [2023-11-29 01:59:27,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:46,150 INFO L124 PetriNetUnfolderBase]: 178118/240990 cut-off events. [2023-11-29 01:59:46,150 INFO L125 PetriNetUnfolderBase]: For 49465/49465 co-relation queries the response was YES. [2023-11-29 01:59:46,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467509 conditions, 240990 events. 178118/240990 cut-off events. For 49465/49465 co-relation queries the response was YES. Maximal size of possible extension queue 8148. Compared 1747533 event pairs, 48026 based on Foata normal form. 92130/322535 useless extension candidates. Maximal degree in co-relation 467495. Up to 141658 conditions per place. [2023-11-29 01:59:47,695 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 46 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2023-11-29 01:59:47,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 329 flow [2023-11-29 01:59:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2023-11-29 01:59:47,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074766355140186 [2023-11-29 01:59:47,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 195 transitions. [2023-11-29 01:59:47,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 195 transitions. [2023-11-29 01:59:47,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:47,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 195 transitions. [2023-11-29 01:59:47,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:47,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:47,700 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:47,700 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 159 flow. Second operand 3 states and 195 transitions. [2023-11-29 01:59:47,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 329 flow [2023-11-29 01:59:47,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 304 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:47,719 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 184 flow [2023-11-29 01:59:47,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-11-29 01:59:47,720 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2023-11-29 01:59:47,720 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 184 flow [2023-11-29 01:59:47,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:47,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:47,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:47,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 01:59:47,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-29 01:59:47,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:47,721 INFO L85 PathProgramCache]: Analyzing trace with hash -163880693, now seen corresponding path program 1 times [2023-11-29 01:59:47,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:47,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672569037] [2023-11-29 01:59:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:47,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:47,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:47,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672569037] [2023-11-29 01:59:47,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672569037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:47,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:47,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:59:47,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508037644] [2023-11-29 01:59:47,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:47,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:59:47,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:47,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:59:47,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:59:47,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 107 [2023-11-29 01:59:47,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:47,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:47,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 107 [2023-11-29 01:59:47,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:09,092 INFO L124 PetriNetUnfolderBase]: 200409/280483 cut-off events. [2023-11-29 02:00:09,092 INFO L125 PetriNetUnfolderBase]: For 83332/83332 co-relation queries the response was YES. [2023-11-29 02:00:09,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608905 conditions, 280483 events. 200409/280483 cut-off events. For 83332/83332 co-relation queries the response was YES. Maximal size of possible extension queue 10175. Compared 2228990 event pairs, 25862 based on Foata normal form. 945/274273 useless extension candidates. Maximal degree in co-relation 608888. Up to 148147 conditions per place. [2023-11-29 02:00:11,148 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 61 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2023-11-29 02:00:11,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 99 transitions, 502 flow [2023-11-29 02:00:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:00:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:00:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-11-29 02:00:11,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630841121495327 [2023-11-29 02:00:11,150 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-11-29 02:00:11,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-11-29 02:00:11,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:11,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-11-29 02:00:11,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:11,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:11,153 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:11,153 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 184 flow. Second operand 4 states and 241 transitions. [2023-11-29 02:00:11,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 99 transitions, 502 flow [2023-11-29 02:00:11,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 99 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:00:11,287 INFO L231 Difference]: Finished difference. Result has 64 places, 67 transitions, 290 flow [2023-11-29 02:00:11,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=290, PETRI_PLACES=64, PETRI_TRANSITIONS=67} [2023-11-29 02:00:11,288 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-11-29 02:00:11,288 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 67 transitions, 290 flow [2023-11-29 02:00:11,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:11,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:11,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:11,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 02:00:11,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-29 02:00:11,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:11,290 INFO L85 PathProgramCache]: Analyzing trace with hash -814744272, now seen corresponding path program 1 times [2023-11-29 02:00:11,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:11,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935278177] [2023-11-29 02:00:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:11,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:00:11,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:11,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935278177] [2023-11-29 02:00:11,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935278177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:11,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:11,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:00:11,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884336814] [2023-11-29 02:00:11,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:11,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:00:11,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:11,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:00:11,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:00:11,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2023-11-29 02:00:11,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 67 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:11,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:11,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2023-11-29 02:00:11,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:12,349 INFO L124 PetriNetUnfolderBase]: 4625/9476 cut-off events. [2023-11-29 02:00:12,349 INFO L125 PetriNetUnfolderBase]: For 6314/6314 co-relation queries the response was YES. [2023-11-29 02:00:12,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23907 conditions, 9476 events. 4625/9476 cut-off events. For 6314/6314 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 79631 event pairs, 565 based on Foata normal form. 9072/18260 useless extension candidates. Maximal degree in co-relation 23888. Up to 6257 conditions per place. [2023-11-29 02:00:12,404 INFO L140 encePairwiseOnDemand]: 95/107 looper letters, 38 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2023-11-29 02:00:12,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 75 transitions, 429 flow [2023-11-29 02:00:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:00:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:00:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-11-29 02:00:12,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137071651090342 [2023-11-29 02:00:12,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-11-29 02:00:12,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-11-29 02:00:12,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:12,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-11-29 02:00:12,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:12,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:12,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:12,409 INFO L175 Difference]: Start difference. First operand has 64 places, 67 transitions, 290 flow. Second operand 3 states and 197 transitions. [2023-11-29 02:00:12,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 75 transitions, 429 flow [2023-11-29 02:00:12,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 429 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 02:00:12,419 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 314 flow [2023-11-29 02:00:12,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2023-11-29 02:00:12,420 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-11-29 02:00:12,420 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 314 flow [2023-11-29 02:00:12,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:12,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:12,420 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:12,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 02:00:12,420 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-29 02:00:12,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:12,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1323340944, now seen corresponding path program 1 times [2023-11-29 02:00:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:12,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686588205] [2023-11-29 02:00:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:00:12,439 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:00:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:00:12,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:00:12,457 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:00:12,458 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-29 02:00:12,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-29 02:00:12,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2023-11-29 02:00:12,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-29 02:00:12,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-29 02:00:12,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-29 02:00:12,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-29 02:00:12,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-29 02:00:12,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 02:00:12,460 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 02:00:12,460 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 02:00:12,461 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-29 02:00:12,499 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:00:12,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 127 transitions, 362 flow [2023-11-29 02:00:12,509 INFO L124 PetriNetUnfolderBase]: 8/83 cut-off events. [2023-11-29 02:00:12,510 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-29 02:00:12,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 83 events. 8/83 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 198 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 112. Up to 7 conditions per place. [2023-11-29 02:00:12,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 127 transitions, 362 flow [2023-11-29 02:00:12,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 66 transitions, 189 flow [2023-11-29 02:00:12,512 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:00:12,513 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@abb4f39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:00:12,513 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-29 02:00:12,515 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:00:12,515 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-29 02:00:12,516 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 02:00:12,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:12,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:12,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-29 02:00:12,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:12,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1558088802, now seen corresponding path program 1 times [2023-11-29 02:00:12,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:12,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988908685] [2023-11-29 02:00:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:12,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:12,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:12,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988908685] [2023-11-29 02:00:12,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988908685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:12,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:12,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:00:12,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605694106] [2023-11-29 02:00:12,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:12,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:00:12,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:12,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:00:12,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:00:12,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 127 [2023-11-29 02:00:12,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:12,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:12,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 127 [2023-11-29 02:00:12,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:01:44,464 INFO L124 PetriNetUnfolderBase]: 842877/1094874 cut-off events. [2023-11-29 02:01:44,465 INFO L125 PetriNetUnfolderBase]: For 288764/288764 co-relation queries the response was YES. [2023-11-29 02:01:47,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2142167 conditions, 1094874 events. 842877/1094874 cut-off events. For 288764/288764 co-relation queries the response was YES. Maximal size of possible extension queue 31119. Compared 8169613 event pairs, 239703 based on Foata normal form. 433717/1484558 useless extension candidates. Maximal degree in co-relation 2142152. Up to 661285 conditions per place. [2023-11-29 02:01:52,280 INFO L140 encePairwiseOnDemand]: 109/127 looper letters, 53 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2023-11-29 02:01:52,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 85 transitions, 394 flow [2023-11-29 02:01:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:01:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:01:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2023-11-29 02:01:52,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6010498687664042 [2023-11-29 02:01:52,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2023-11-29 02:01:52,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2023-11-29 02:01:52,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:01:52,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2023-11-29 02:01:52,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:52,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:52,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:52,283 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 189 flow. Second operand 3 states and 229 transitions. [2023-11-29 02:01:52,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 85 transitions, 394 flow [2023-11-29 02:01:52,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 353 flow, removed 20 selfloop flow, removed 1 redundant places. [2023-11-29 02:01:52,343 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 212 flow [2023-11-29 02:01:52,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-11-29 02:01:52,343 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2023-11-29 02:01:52,344 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 212 flow [2023-11-29 02:01:52,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:52,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:01:52,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:52,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 02:01:52,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-29 02:01:52,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:52,345 INFO L85 PathProgramCache]: Analyzing trace with hash -344372537, now seen corresponding path program 1 times [2023-11-29 02:01:52,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:52,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223312883] [2023-11-29 02:01:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:52,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:01:52,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:52,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223312883] [2023-11-29 02:01:52,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223312883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:01:52,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:01:52,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:01:52,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560753370] [2023-11-29 02:01:52,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:01:52,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:01:52,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:52,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:01:52,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:01:52,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 127 [2023-11-29 02:01:52,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:52,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:01:52,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 127 [2023-11-29 02:01:52,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand