./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c --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_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/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_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/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_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/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 2c579ed20cf5b381709dcc4ef9fbcf839f80c68ac017a29b947b11bd3a57dd56 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:36:05,162 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:36:05,231 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:36:05,236 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:36:05,237 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:36:05,261 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:36:05,262 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:36:05,262 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:36:05,263 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:36:05,264 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:36:05,264 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:36:05,265 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:36:05,266 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:36:05,266 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:36:05,267 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:36:05,267 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:36:05,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:36:05,268 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:36:05,269 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:36:05,269 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:36:05,270 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:36:05,270 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:36:05,271 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:36:05,271 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:36:05,272 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:36:05,272 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:36:05,273 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:36:05,273 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:36:05,274 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:36:05,274 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:36:05,274 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:36:05,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:36:05,275 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:36:05,275 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:36:05,276 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:36:05,276 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:36:05,276 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:36:05,276 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:36:05,277 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:36:05,277 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:36:05,277 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:36:05,277 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:36:05,278 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_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c579ed20cf5b381709dcc4ef9fbcf839f80c68ac017a29b947b11bd3a57dd56 [2023-11-29 00:36:05,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:36:05,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:36:05,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:36:05,545 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:36:05,545 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:36:05,546 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2023-11-29 00:36:08,244 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:36:08,410 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:36:08,410 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2023-11-29 00:36:08,419 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/data/14777c9bd/5f350a5ecfa84d44abcedab59cac71db/FLAG2dff2ea14 [2023-11-29 00:36:08,434 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/data/14777c9bd/5f350a5ecfa84d44abcedab59cac71db [2023-11-29 00:36:08,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:36:08,438 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:36:08,440 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:36:08,440 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:36:08,446 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:36:08,446 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,448 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72bca06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08, skipping insertion in model container [2023-11-29 00:36:08,448 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,475 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:36:08,658 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_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2644,2657] [2023-11-29 00:36:08,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:36:08,678 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:36:08,701 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_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2644,2657] [2023-11-29 00:36:08,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:36:08,720 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:36:08,720 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08 WrapperNode [2023-11-29 00:36:08,720 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:36:08,721 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:36:08,721 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:36:08,721 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:36:08,726 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,735 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,759 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 196 [2023-11-29 00:36:08,759 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:36:08,760 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:36:08,760 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:36:08,760 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:36:08,769 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,770 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,774 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,794 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 2, 9, 2, 3]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 1, 5, 1, 1]. [2023-11-29 00:36:08,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,795 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,808 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,817 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,819 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,825 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:36:08,826 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:36:08,826 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:36:08,826 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:36:08,827 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (1/1) ... [2023-11-29 00:36:08,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:36:08,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:36:08,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:36:08,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:36:08,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:36:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 00:36:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 00:36:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 00:36:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-29 00:36:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-29 00:36:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:36:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:36:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:36:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:36:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:36:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 00:36:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:36:08,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:36:08,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:36:08,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:36:08,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 00:36:08,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 00:36:08,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 00:36:08,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 00:36:08,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-29 00:36:08,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-29 00:36:08,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:36:08,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:36:08,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:36:08,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:36:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:36:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:36:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:36:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:36:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 00:36:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:36:08,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:36:08,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:36:08,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:36:08,907 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 00:36:09,047 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:36:09,049 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:36:09,399 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:36:09,703 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:36:09,703 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-29 00:36:09,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:36:09 BoogieIcfgContainer [2023-11-29 00:36:09,703 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:36:09,705 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:36:09,706 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:36:09,709 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:36:09,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:36:08" (1/3) ... [2023-11-29 00:36:09,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675534e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:36:09, skipping insertion in model container [2023-11-29 00:36:09,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:36:08" (2/3) ... [2023-11-29 00:36:09,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675534e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:36:09, skipping insertion in model container [2023-11-29 00:36:09,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:36:09" (3/3) ... [2023-11-29 00:36:09,711 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2023-11-29 00:36:09,719 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:36:09,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:36:09,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:36:09,728 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:36:09,764 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:36:09,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 29 transitions, 72 flow [2023-11-29 00:36:09,817 INFO L124 PetriNetUnfolderBase]: 7/27 cut-off events. [2023-11-29 00:36:09,818 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:36:09,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 7/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 16. Up to 2 conditions per place. [2023-11-29 00:36:09,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 29 transitions, 72 flow [2023-11-29 00:36:09,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 26 transitions, 64 flow [2023-11-29 00:36:09,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:36:09,841 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;@59b1e80a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:36:09,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 00:36:09,853 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:36:09,853 INFO L124 PetriNetUnfolderBase]: 7/25 cut-off events. [2023-11-29 00:36:09,853 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:36:09,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:09,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:09,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:36:09,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:09,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1276081678, now seen corresponding path program 1 times [2023-11-29 00:36:09,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:36:09,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902463778] [2023-11-29 00:36:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:09,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:36:09,950 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:36:09,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966863726] [2023-11-29 00:36:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:09,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:09,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:36:09,954 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:36:09,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:36:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:10,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:36:10,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:10,180 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 00:36:10,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:36:10,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:36:10,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902463778] [2023-11-29 00:36:10,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:36:10,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966863726] [2023-11-29 00:36:10,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966863726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:36:10,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:36:10,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:36:10,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105685232] [2023-11-29 00:36:10,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:36:10,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:36:10,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:36:10,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:36:10,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:36:10,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-29 00:36:10,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 00:36:10,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:10,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-29 00:36:10,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:10,385 INFO L124 PetriNetUnfolderBase]: 123/211 cut-off events. [2023-11-29 00:36:10,385 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-29 00:36:10,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 211 events. 123/211 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 537 event pairs, 66 based on Foata normal form. 1/154 useless extension candidates. Maximal degree in co-relation 162. Up to 109 conditions per place. [2023-11-29 00:36:10,389 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 26 selfloop transitions, 2 changer transitions 16/45 dead transitions. [2023-11-29 00:36:10,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 45 transitions, 202 flow [2023-11-29 00:36:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:36:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:36:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2023-11-29 00:36:10,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49137931034482757 [2023-11-29 00:36:10,404 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 57 transitions. [2023-11-29 00:36:10,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 57 transitions. [2023-11-29 00:36:10,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:10,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 57 transitions. [2023-11-29 00:36:10,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 00:36:10,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 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 00:36:10,414 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 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 00:36:10,416 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 64 flow. Second operand 4 states and 57 transitions. [2023-11-29 00:36:10,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 45 transitions, 202 flow [2023-11-29 00:36:10,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 45 transitions, 186 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:36:10,422 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 70 flow [2023-11-29 00:36:10,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-29 00:36:10,428 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-11-29 00:36:10,428 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 70 flow [2023-11-29 00:36:10,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 00:36:10,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:10,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:10,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:36:10,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:36:10,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:36:10,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:10,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1836501080, now seen corresponding path program 1 times [2023-11-29 00:36:10,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:36:10,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497782969] [2023-11-29 00:36:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:10,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:36:10,661 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:36:10,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592101135] [2023-11-29 00:36:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:10,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:10,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:36:10,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:36:10,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:36:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:10,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:36:10,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:10,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:10,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:36:10,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497782969] [2023-11-29 00:36:10,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:36:10,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592101135] [2023-11-29 00:36:10,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592101135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:36:10,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:36:10,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-11-29 00:36:10,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113522590] [2023-11-29 00:36:10,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:36:10,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:36:10,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:36:10,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:36:10,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:36:10,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-29 00:36:10,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 70 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 00:36:10,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:10,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-29 00:36:10,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:11,096 INFO L124 PetriNetUnfolderBase]: 94/158 cut-off events. [2023-11-29 00:36:11,096 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-29 00:36:11,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 158 events. 94/158 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 335 event pairs, 24 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 321. Up to 73 conditions per place. [2023-11-29 00:36:11,099 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 35 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2023-11-29 00:36:11,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 188 flow [2023-11-29 00:36:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:36:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 00:36:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 63 transitions. [2023-11-29 00:36:11,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3103448275862069 [2023-11-29 00:36:11,101 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 63 transitions. [2023-11-29 00:36:11,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 63 transitions. [2023-11-29 00:36:11,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:11,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 63 transitions. [2023-11-29 00:36:11,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 00:36:11,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 00:36:11,104 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 00:36:11,104 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 70 flow. Second operand 7 states and 63 transitions. [2023-11-29 00:36:11,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 188 flow [2023-11-29 00:36:11,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 184 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 00:36:11,107 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 101 flow [2023-11-29 00:36:11,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=101, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-29 00:36:11,108 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-11-29 00:36:11,108 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 101 flow [2023-11-29 00:36:11,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 00:36:11,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:11,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:11,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:36:11,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:11,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:36:11,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1598898183, now seen corresponding path program 1 times [2023-11-29 00:36:11,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:36:11,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978707520] [2023-11-29 00:36:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:36:11,335 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:36:11,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475747272] [2023-11-29 00:36:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:11,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:11,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:36:11,337 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:36:11,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:36:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:11,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:36:11,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:36:11,528 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:36:11,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:36:11,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978707520] [2023-11-29 00:36:11,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:36:11,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475747272] [2023-11-29 00:36:11,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475747272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:36:11,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:36:11,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:36:11,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628450508] [2023-11-29 00:36:11,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:36:11,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:36:11,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:36:11,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:36:11,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:36:11,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-29 00:36:11,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 00:36:11,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:11,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-29 00:36:11,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:11,689 INFO L124 PetriNetUnfolderBase]: 187/312 cut-off events. [2023-11-29 00:36:11,689 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-11-29 00:36:11,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 312 events. 187/312 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 851 event pairs, 102 based on Foata normal form. 1/284 useless extension candidates. Maximal degree in co-relation 749. Up to 158 conditions per place. [2023-11-29 00:36:11,693 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 3 changer transitions 25/56 dead transitions. [2023-11-29 00:36:11,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 56 transitions, 300 flow [2023-11-29 00:36:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:36:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:36:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2023-11-29 00:36:11,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413793103448276 [2023-11-29 00:36:11,694 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 64 transitions. [2023-11-29 00:36:11,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 64 transitions. [2023-11-29 00:36:11,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:11,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 64 transitions. [2023-11-29 00:36:11,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 00:36:11,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 00:36:11,697 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 00:36:11,697 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 101 flow. Second operand 5 states and 64 transitions. [2023-11-29 00:36:11,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 56 transitions, 300 flow [2023-11-29 00:36:11,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 56 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:36:11,701 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 123 flow [2023-11-29 00:36:11,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-11-29 00:36:11,702 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 13 predicate places. [2023-11-29 00:36:11,702 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 123 flow [2023-11-29 00:36:11,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 00:36:11,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:11,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:11,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 00:36:11,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:11,903 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:36:11,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash 746347914, now seen corresponding path program 1 times [2023-11-29 00:36:11,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:36:11,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507300849] [2023-11-29 00:36:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:11,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:36:11,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:36:11,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235824050] [2023-11-29 00:36:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:11,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:11,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:36:11,926 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:36:11,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:36:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:12,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:36:12,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:12,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:12,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:36:12,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507300849] [2023-11-29 00:36:12,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:36:12,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235824050] [2023-11-29 00:36:12,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235824050] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:36:12,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:36:12,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 00:36:12,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254313752] [2023-11-29 00:36:12,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:36:12,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:36:12,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:36:12,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:36:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:36:12,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-29 00:36:12,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 00:36:12,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:12,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-29 00:36:12,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:12,320 INFO L124 PetriNetUnfolderBase]: 118/204 cut-off events. [2023-11-29 00:36:12,320 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-29 00:36:12,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 204 events. 118/204 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 451 event pairs, 51 based on Foata normal form. 16/200 useless extension candidates. Maximal degree in co-relation 509. Up to 160 conditions per place. [2023-11-29 00:36:12,323 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2023-11-29 00:36:12,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 249 flow [2023-11-29 00:36:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:36:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:36:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2023-11-29 00:36:12,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724137931034483 [2023-11-29 00:36:12,324 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 54 transitions. [2023-11-29 00:36:12,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 54 transitions. [2023-11-29 00:36:12,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:12,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 54 transitions. [2023-11-29 00:36:12,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 00:36:12,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 00:36:12,327 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 00:36:12,327 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 123 flow. Second operand 5 states and 54 transitions. [2023-11-29 00:36:12,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 249 flow [2023-11-29 00:36:12,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 234 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-29 00:36:12,330 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 168 flow [2023-11-29 00:36:12,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-11-29 00:36:12,331 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 15 predicate places. [2023-11-29 00:36:12,331 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 168 flow [2023-11-29 00:36:12,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 00:36:12,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:12,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:12,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:36:12,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:12,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:36:12,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash -23822860, now seen corresponding path program 1 times [2023-11-29 00:36:12,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:36:12,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769315165] [2023-11-29 00:36:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:12,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:36:12,559 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:36:12,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415842734] [2023-11-29 00:36:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:36:12,561 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:36:12,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:36:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:12,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:36:12,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:36:12,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:36:12,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:36:12,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769315165] [2023-11-29 00:36:12,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:36:12,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415842734] [2023-11-29 00:36:12,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415842734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:36:12,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:36:12,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:36:12,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521192017] [2023-11-29 00:36:12,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:36:12,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:36:12,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:36:12,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:36:12,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:36:12,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-29 00:36:12,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 00:36:12,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:12,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-29 00:36:12,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:13,072 INFO L124 PetriNetUnfolderBase]: 118/205 cut-off events. [2023-11-29 00:36:13,073 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-11-29 00:36:13,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 205 events. 118/205 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 449 event pairs, 69 based on Foata normal form. 1/187 useless extension candidates. Maximal degree in co-relation 551. Up to 198 conditions per place. [2023-11-29 00:36:13,075 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 30 selfloop transitions, 2 changer transitions 6/39 dead transitions. [2023-11-29 00:36:13,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 255 flow [2023-11-29 00:36:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:36:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 00:36:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 54 transitions. [2023-11-29 00:36:13,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2660098522167488 [2023-11-29 00:36:13,077 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 54 transitions. [2023-11-29 00:36:13,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 54 transitions. [2023-11-29 00:36:13,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:13,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 54 transitions. [2023-11-29 00:36:13,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 00:36:13,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 00:36:13,079 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 00:36:13,079 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 168 flow. Second operand 7 states and 54 transitions. [2023-11-29 00:36:13,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 255 flow [2023-11-29 00:36:13,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 249 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 00:36:13,082 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 150 flow [2023-11-29 00:36:13,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2023-11-29 00:36:13,083 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2023-11-29 00:36:13,083 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 150 flow [2023-11-29 00:36:13,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 00:36:13,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:13,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:13,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:36:13,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:13,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:36:13,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:13,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1610094435, now seen corresponding path program 1 times [2023-11-29 00:36:13,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:36:13,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038723995] [2023-11-29 00:36:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:13,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:36:13,310 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:36:13,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234911583] [2023-11-29 00:36:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:13,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:36:13,312 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:36:13,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:36:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:13,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:36:13,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:36:13,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:36:13,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:36:13,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038723995] [2023-11-29 00:36:13,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:36:13,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234911583] [2023-11-29 00:36:13,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234911583] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:36:13,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:36:13,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 00:36:13,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633039177] [2023-11-29 00:36:13,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:36:13,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:36:13,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:36:13,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:36:13,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:36:13,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-29 00:36:13,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 00:36:13,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:13,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-29 00:36:13,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:13,684 INFO L124 PetriNetUnfolderBase]: 116/200 cut-off events. [2023-11-29 00:36:13,684 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-29 00:36:13,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 200 events. 116/200 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 438 event pairs, 69 based on Foata normal form. 1/182 useless extension candidates. Maximal degree in co-relation 543. Up to 197 conditions per place. [2023-11-29 00:36:13,687 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 29 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2023-11-29 00:36:13,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 34 transitions, 220 flow [2023-11-29 00:36:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:36:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:36:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2023-11-29 00:36:13,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.296551724137931 [2023-11-29 00:36:13,688 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 43 transitions. [2023-11-29 00:36:13,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 43 transitions. [2023-11-29 00:36:13,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:13,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 43 transitions. [2023-11-29 00:36:13,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 00:36:13,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 00:36:13,690 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 00:36:13,690 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 150 flow. Second operand 5 states and 43 transitions. [2023-11-29 00:36:13,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 34 transitions, 220 flow [2023-11-29 00:36:13,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 200 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-11-29 00:36:13,693 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 148 flow [2023-11-29 00:36:13,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-11-29 00:36:13,694 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-11-29 00:36:13,694 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 148 flow [2023-11-29 00:36:13,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 00:36:13,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:13,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:13,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:36:13,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:13,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:36:13,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:13,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2109425069, now seen corresponding path program 1 times [2023-11-29 00:36:13,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:36:13,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819311511] [2023-11-29 00:36:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:13,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:36:13,925 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:36:13,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183564804] [2023-11-29 00:36:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:13,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:13,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:36:13,927 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:36:13,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:36:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:14,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:36:14,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:36:14,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:36:14,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:36:14,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819311511] [2023-11-29 00:36:14,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:36:14,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183564804] [2023-11-29 00:36:14,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183564804] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:36:14,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:36:14,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 00:36:14,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069144962] [2023-11-29 00:36:14,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:36:14,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:36:14,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:36:14,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:36:14,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:36:14,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2023-11-29 00:36:14,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 00:36:14,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:14,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2023-11-29 00:36:14,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:14,313 INFO L124 PetriNetUnfolderBase]: 146/248 cut-off events. [2023-11-29 00:36:14,314 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2023-11-29 00:36:14,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 248 events. 146/248 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 627 event pairs, 69 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 661. Up to 198 conditions per place. [2023-11-29 00:36:14,316 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 41 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-11-29 00:36:14,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 291 flow [2023-11-29 00:36:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:36:14,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:36:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2023-11-29 00:36:14,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35172413793103446 [2023-11-29 00:36:14,317 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 51 transitions. [2023-11-29 00:36:14,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 51 transitions. [2023-11-29 00:36:14,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:14,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 51 transitions. [2023-11-29 00:36:14,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 00:36:14,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 00:36:14,319 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 00:36:14,319 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 148 flow. Second operand 5 states and 51 transitions. [2023-11-29 00:36:14,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 291 flow [2023-11-29 00:36:14,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 286 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 00:36:14,322 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 159 flow [2023-11-29 00:36:14,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2023-11-29 00:36:14,323 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2023-11-29 00:36:14,323 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 159 flow [2023-11-29 00:36:14,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 00:36:14,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:14,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:14,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:36:14,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:14,524 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:36:14,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:14,524 INFO L85 PathProgramCache]: Analyzing trace with hash 465864510, now seen corresponding path program 1 times [2023-11-29 00:36:14,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:36:14,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646681427] [2023-11-29 00:36:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:14,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:36:14,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:36:14,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152768353] [2023-11-29 00:36:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:14,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:36:14,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:36:14,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:36:14,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e33c293-64b1-4f1b-a28e-3f3e47217cfe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:36:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:14,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 00:36:14,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:14,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 00:36:14,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:14,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:14,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:14,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:14,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:36:14,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:14,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:14,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:14,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:14,979 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 00:36:14,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 00:36:15,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:36:15,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:36:15,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 00:36:15,650 INFO L349 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2023-11-29 00:36:15,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 29 [2023-11-29 00:36:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:36:15,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:31,426 INFO L349 Elim1Store]: treesize reduction 4, result has 97.4 percent of original size [2023-11-29 00:36:31,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1287 treesize of output 1100 [2023-11-29 00:37:11,714 WARN L293 SmtUtils]: Spent 5.44s on a formula simplification that was a NOOP. DAG size: 630 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:37:35,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2945 treesize of output 2821 [2023-11-29 00:37:35,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2821 treesize of output 2709 [2023-11-29 00:39:40,618 WARN L293 SmtUtils]: Spent 2.08m on a formula simplification that was a NOOP. DAG size: 1353 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-29 00:39:40,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:39:40,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 26 select indices, 26 select index equivalence classes, 0 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 325 case distinctions, treesize of input 3526 treesize of output 5795 [2023-11-29 00:41:50,058 WARN L293 SmtUtils]: Spent 2.10m on a formula simplification that was a NOOP. DAG size: 1459 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-29 00:41:50,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:41:50,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 27 select indices, 27 select index equivalence classes, 0 disjoint index pairs (out of 351 index pairs), introduced 27 new quantified variables, introduced 351 case distinctions, treesize of input 3647 treesize of output 6084 [2023-11-29 00:41:59,847 WARN L293 SmtUtils]: Spent 9.77s on a formula simplification. DAG size of input: 3587 DAG size of output: 3578 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:42:02,647 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:42:03,121 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-29 00:42:03,663 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:42:09,002 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:42:09,575 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:42:10,620 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-29 00:42:11,210 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:42:11,341 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-11-29 00:42:11,995 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-29 00:42:12,571 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-29 00:42:13,132 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:42:13,815 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:42:20,414 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:42:32,575 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:42:57,319 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:43:04,078 WARN L293 SmtUtils]: Spent 6.32s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-11-29 00:43:11,910 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:43:12,061 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-29 00:43:12,310 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-29 00:43:13,894 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-11-29 00:43:15,398 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:43:16,545 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-29 00:43:18,677 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:43:18,758 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-29 00:43:18,859 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:43:20,318 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:43:25,393 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:43:35,632 WARN L293 SmtUtils]: Spent 6.90s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-11-29 00:44:02,829 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:44:25,494 WARN L293 SmtUtils]: Spent 9.96s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-11-29 00:45:34,028 WARN L293 SmtUtils]: Spent 10.64s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-11-29 00:46:21,239 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:46:38,151 WARN L293 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 40 DAG size of output: 30 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-11-29 00:48:12,474 WARN L293 SmtUtils]: Spent 7.58s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:48:24,928 WARN L293 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:48:32,869 WARN L293 SmtUtils]: Spent 5.64s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:48:45,206 WARN L293 SmtUtils]: Spent 6.71s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:48:54,567 WARN L293 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:49:08,438 WARN L293 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:49:31,035 WARN L293 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:49:48,762 WARN L293 SmtUtils]: Spent 5.57s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:49:58,766 WARN L293 SmtUtils]: Spent 6.74s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:50:26,565 WARN L293 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 00:50:54,329 WARN L293 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)