./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/test-context1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 13:54:18,725 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 13:54:18,777 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 13:54:18,783 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 13:54:18,784 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 13:54:18,802 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 13:54:18,803 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 13:54:18,803 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 13:54:18,804 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 13:54:18,804 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 13:54:18,804 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 13:54:18,804 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 13:54:18,805 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 13:54:18,808 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 13:54:18,808 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 13:54:18,808 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 13:54:18,808 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 13:54:18,809 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 13:54:18,809 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 13:54:18,809 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 13:54:18,809 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 13:54:18,810 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 13:54:18,810 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 13:54:18,810 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 13:54:18,810 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 13:54:18,810 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 13:54:18,810 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 13:54:18,811 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 13:54:18,811 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 13:54:18,811 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 13:54:18,811 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 13:54:18,811 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 13:54:18,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:54:18,812 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 13:54:18,812 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 13:54:18,812 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 13:54:18,812 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 13:54:18,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 13:54:18,812 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 13:54:18,812 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 13:54:18,813 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 13:54:18,813 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 13:54:18,813 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2024-11-22 13:54:19,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 13:54:19,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 13:54:19,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 13:54:19,088 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 13:54:19,088 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 13:54:19,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-context1.wvr.c [2024-11-22 13:54:20,380 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 13:54:20,521 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 13:54:20,522 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2024-11-22 13:54:20,528 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0af3f22ed/285b74064fc44abf888c04733066b8f2/FLAG28c2abf9e [2024-11-22 13:54:20,541 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0af3f22ed/285b74064fc44abf888c04733066b8f2 [2024-11-22 13:54:20,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 13:54:20,544 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 13:54:20,545 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 13:54:20,545 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 13:54:20,549 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 13:54:20,549 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50062c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20, skipping insertion in model container [2024-11-22 13:54:20,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,569 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 13:54:20,746 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2024-11-22 13:54:20,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:54:20,762 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 13:54:20,776 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2024-11-22 13:54:20,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:54:20,792 INFO L204 MainTranslator]: Completed translation [2024-11-22 13:54:20,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20 WrapperNode [2024-11-22 13:54:20,794 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 13:54:20,795 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 13:54:20,795 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 13:54:20,795 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 13:54:20,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,807 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,824 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 127 [2024-11-22 13:54:20,824 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 13:54:20,825 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 13:54:20,825 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 13:54:20,825 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 13:54:20,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,836 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,847 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-22 13:54:20,850 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,850 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,855 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,860 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,861 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,862 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,863 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 13:54:20,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 13:54:20,864 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 13:54:20,864 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 13:54:20,865 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (1/1) ... [2024-11-22 13:54:20,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:54:20,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:20,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 13:54:20,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 13:54:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 13:54:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 13:54:20,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 13:54:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 13:54:20,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 13:54:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 13:54:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 13:54:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 13:54:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 13:54:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 13:54:20,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 13:54:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 13:54:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 13:54:20,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 13:54:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 13:54:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 13:54:20,946 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 13:54:21,039 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 13:54:21,041 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 13:54:21,200 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 13:54:21,200 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 13:54:21,315 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 13:54:21,317 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 13:54:21,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:54:21 BoogieIcfgContainer [2024-11-22 13:54:21,317 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 13:54:21,320 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 13:54:21,320 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 13:54:21,323 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 13:54:21,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:54:20" (1/3) ... [2024-11-22 13:54:21,324 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6f6c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:54:21, skipping insertion in model container [2024-11-22 13:54:21,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:20" (2/3) ... [2024-11-22 13:54:21,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6f6c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:54:21, skipping insertion in model container [2024-11-22 13:54:21,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:54:21" (3/3) ... [2024-11-22 13:54:21,326 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2024-11-22 13:54:21,338 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 13:54:21,339 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 13:54:21,339 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 13:54:21,374 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 13:54:21,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 70 flow [2024-11-22 13:54:21,425 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2024-11-22 13:54:21,429 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:54:21,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 5/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-11-22 13:54:21,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 70 flow [2024-11-22 13:54:21,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 62 flow [2024-11-22 13:54:21,443 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:54:21,448 INFO L333 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, 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;@439ae8b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:54:21,449 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:54:21,455 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:54:21,455 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2024-11-22 13:54:21,456 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:54:21,456 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:21,457 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:21,457 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:21,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1826755679, now seen corresponding path program 1 times [2024-11-22 13:54:21,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:21,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620416463] [2024-11-22 13:54:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:54:21,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:54:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:21,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:21,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620416463] [2024-11-22 13:54:21,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620416463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:54:21,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:54:21,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:54:21,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384109217] [2024-11-22 13:54:21,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:54:21,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 13:54:21,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:21,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 13:54:21,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 13:54:21,657 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:21,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:21,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:21,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:21,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:21,747 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2024-11-22 13:54:21,747 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-22 13:54:21,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 217 events. 122/217 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 721 event pairs, 94 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 405. Up to 214 conditions per place. [2024-11-22 13:54:21,753 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-11-22 13:54:21,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 98 flow [2024-11-22 13:54:21,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 13:54:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-22 13:54:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2024-11-22 13:54:21,763 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-22 13:54:21,765 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 2 states and 32 transitions. [2024-11-22 13:54:21,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 98 flow [2024-11-22 13:54:21,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 13:54:21,769 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2024-11-22 13:54:21,771 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-11-22 13:54:21,774 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-11-22 13:54:21,776 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2024-11-22 13:54:21,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:21,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:21,776 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:21,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 13:54:21,777 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:21,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:21,778 INFO L85 PathProgramCache]: Analyzing trace with hash 5065408, now seen corresponding path program 1 times [2024-11-22 13:54:21,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:21,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840864802] [2024-11-22 13:54:21,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:54:21,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:54:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:21,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:21,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840864802] [2024-11-22 13:54:21,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840864802] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:54:21,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:54:21,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:54:21,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412741493] [2024-11-22 13:54:21,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:54:21,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:54:21,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:21,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:54:21,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:54:21,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:21,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:21,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:21,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:21,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:22,017 INFO L124 PetriNetUnfolderBase]: 203/353 cut-off events. [2024-11-22 13:54:22,018 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-22 13:54:22,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 353 events. 203/353 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1268 event pairs, 82 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 709. Up to 176 conditions per place. [2024-11-22 13:54:22,022 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 28 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2024-11-22 13:54:22,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 144 flow [2024-11-22 13:54:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:54:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:54:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-11-22 13:54:22,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-22 13:54:22,024 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 49 transitions. [2024-11-22 13:54:22,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 144 flow [2024-11-22 13:54:22,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 13:54:22,026 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2024-11-22 13:54:22,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-11-22 13:54:22,027 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-11-22 13:54:22,027 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2024-11-22 13:54:22,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:22,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:22,027 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:22,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 13:54:22,028 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:22,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:22,029 INFO L85 PathProgramCache]: Analyzing trace with hash -576454128, now seen corresponding path program 1 times [2024-11-22 13:54:22,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:22,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956317031] [2024-11-22 13:54:22,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:54:22,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:54:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:22,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:22,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956317031] [2024-11-22 13:54:22,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956317031] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:54:22,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:54:22,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:54:22,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732859593] [2024-11-22 13:54:22,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:54:22,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:54:22,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:22,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:54:22,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:54:22,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:22,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:22,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:22,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:22,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:22,206 INFO L124 PetriNetUnfolderBase]: 251/446 cut-off events. [2024-11-22 13:54:22,207 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-22 13:54:22,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 446 events. 251/446 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1647 event pairs, 113 based on Foata normal form. 11/386 useless extension candidates. Maximal degree in co-relation 934. Up to 306 conditions per place. [2024-11-22 13:54:22,210 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2024-11-22 13:54:22,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 163 flow [2024-11-22 13:54:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:54:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:54:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-11-22 13:54:22,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-11-22 13:54:22,213 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 3 states and 50 transitions. [2024-11-22 13:54:22,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 163 flow [2024-11-22 13:54:22,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:54:22,214 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2024-11-22 13:54:22,214 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-11-22 13:54:22,215 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-11-22 13:54:22,215 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2024-11-22 13:54:22,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:22,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:22,215 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:22,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 13:54:22,215 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:22,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:22,216 INFO L85 PathProgramCache]: Analyzing trace with hash -685549057, now seen corresponding path program 1 times [2024-11-22 13:54:22,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:22,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665076074] [2024-11-22 13:54:22,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:54:22,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:54:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:22,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:22,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665076074] [2024-11-22 13:54:22,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665076074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:54:22,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:54:22,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:54:22,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270832615] [2024-11-22 13:54:22,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:54:22,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:54:22,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:22,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:54:22,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:54:22,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:22,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:22,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:22,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:22,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:22,491 INFO L124 PetriNetUnfolderBase]: 319/585 cut-off events. [2024-11-22 13:54:22,491 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-22 13:54:22,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 585 events. 319/585 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2472 event pairs, 285 based on Foata normal form. 12/502 useless extension candidates. Maximal degree in co-relation 1262. Up to 443 conditions per place. [2024-11-22 13:54:22,495 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2024-11-22 13:54:22,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 184 flow [2024-11-22 13:54:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:54:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:54:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2024-11-22 13:54:22,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-11-22 13:54:22,497 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 57 transitions. [2024-11-22 13:54:22,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 184 flow [2024-11-22 13:54:22,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 13:54:22,498 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 84 flow [2024-11-22 13:54:22,498 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-11-22 13:54:22,499 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-11-22 13:54:22,501 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 84 flow [2024-11-22 13:54:22,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:22,501 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:22,501 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:22,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 13:54:22,502 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:22,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1526105098, now seen corresponding path program 1 times [2024-11-22 13:54:22,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:22,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236842167] [2024-11-22 13:54:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:54:22,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:54:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:54:22,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:22,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236842167] [2024-11-22 13:54:22,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236842167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:22,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536353521] [2024-11-22 13:54:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:54:22,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:22,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:22,757 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:22,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 13:54:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:54:22,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 13:54:22,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:54:22,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:23,037 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:54:23,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-22 13:54:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:54:23,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536353521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:23,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:23,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-22 13:54:23,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337290119] [2024-11-22 13:54:23,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:23,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 13:54:23,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:23,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 13:54:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-22 13:54:23,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:23,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 84 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:23,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:23,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:23,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:23,247 INFO L124 PetriNetUnfolderBase]: 331/583 cut-off events. [2024-11-22 13:54:23,247 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-22 13:54:23,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 583 events. 331/583 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2148 event pairs, 68 based on Foata normal form. 1/492 useless extension candidates. Maximal degree in co-relation 1281. Up to 157 conditions per place. [2024-11-22 13:54:23,250 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 44 selfloop transitions, 5 changer transitions 12/64 dead transitions. [2024-11-22 13:54:23,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 64 transitions, 295 flow [2024-11-22 13:54:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:54:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:54:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-11-22 13:54:23,251 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-22 13:54:23,251 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 84 flow. Second operand 6 states and 91 transitions. [2024-11-22 13:54:23,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 64 transitions, 295 flow [2024-11-22 13:54:23,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 64 transitions, 289 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-22 13:54:23,253 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 98 flow [2024-11-22 13:54:23,253 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2024-11-22 13:54:23,253 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2024-11-22 13:54:23,253 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 98 flow [2024-11-22 13:54:23,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:23,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:23,254 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:23,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-22 13:54:23,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:23,458 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:23,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:23,458 INFO L85 PathProgramCache]: Analyzing trace with hash -921432716, now seen corresponding path program 2 times [2024-11-22 13:54:23,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:23,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457093145] [2024-11-22 13:54:23,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:54:23,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:23,471 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:54:23,471 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:54:23,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:23,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457093145] [2024-11-22 13:54:23,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457093145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:23,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759907607] [2024-11-22 13:54:23,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:54:23,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:23,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:23,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:23,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 13:54:23,603 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:54:23,603 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:23,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 13:54:23,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:54:23,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:54:23,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759907607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:23,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:23,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-22 13:54:23,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48682338] [2024-11-22 13:54:23,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:23,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 13:54:23,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:23,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 13:54:23,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-22 13:54:23,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:23,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 98 flow. Second operand has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:23,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:23,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:23,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:24,030 INFO L124 PetriNetUnfolderBase]: 570/1015 cut-off events. [2024-11-22 13:54:24,031 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-11-22 13:54:24,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 1015 events. 570/1015 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4589 event pairs, 434 based on Foata normal form. 11/868 useless extension candidates. Maximal degree in co-relation 2280. Up to 579 conditions per place. [2024-11-22 13:54:24,034 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 22 selfloop transitions, 3 changer transitions 30/58 dead transitions. [2024-11-22 13:54:24,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 297 flow [2024-11-22 13:54:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:54:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:54:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-11-22 13:54:24,035 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-11-22 13:54:24,035 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 98 flow. Second operand 6 states and 82 transitions. [2024-11-22 13:54:24,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 297 flow [2024-11-22 13:54:24,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 58 transitions, 284 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-22 13:54:24,039 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 108 flow [2024-11-22 13:54:24,039 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2024-11-22 13:54:24,040 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 13 predicate places. [2024-11-22 13:54:24,041 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 108 flow [2024-11-22 13:54:24,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:24,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:24,042 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:24,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 13:54:24,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-22 13:54:24,246 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:24,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash 2021256789, now seen corresponding path program 3 times [2024-11-22 13:54:24,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:24,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895419860] [2024-11-22 13:54:24,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:54:24,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:24,269 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 13:54:24,269 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:54:24,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:24,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895419860] [2024-11-22 13:54:24,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895419860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:24,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010460646] [2024-11-22 13:54:24,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:54:24,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:24,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:24,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:24,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 13:54:24,361 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 13:54:24,361 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:24,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-22 13:54:24,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 13:54:24,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 13:54:24,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010460646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:24,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:24,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2024-11-22 13:54:24,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883555397] [2024-11-22 13:54:24,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:24,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 13:54:24,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:24,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 13:54:24,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-22 13:54:24,416 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:24,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:24,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:24,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:24,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:24,541 INFO L124 PetriNetUnfolderBase]: 719/1266 cut-off events. [2024-11-22 13:54:24,541 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-11-22 13:54:24,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2854 conditions, 1266 events. 719/1266 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5527 event pairs, 280 based on Foata normal form. 22/1089 useless extension candidates. Maximal degree in co-relation 2843. Up to 462 conditions per place. [2024-11-22 13:54:24,546 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 51 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-11-22 13:54:24,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 324 flow [2024-11-22 13:54:24,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:54:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:54:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-11-22 13:54:24,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-22 13:54:24,548 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 108 flow. Second operand 4 states and 72 transitions. [2024-11-22 13:54:24,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 324 flow [2024-11-22 13:54:24,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 61 transitions, 308 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-22 13:54:24,553 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 160 flow [2024-11-22 13:54:24,553 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-11-22 13:54:24,553 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2024-11-22 13:54:24,553 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 160 flow [2024-11-22 13:54:24,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:24,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:24,554 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:24,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 13:54:24,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:24,755 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:24,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1584792024, now seen corresponding path program 4 times [2024-11-22 13:54:24,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:24,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132061622] [2024-11-22 13:54:24,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:54:24,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:24,766 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:54:24,766 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 13:54:24,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:24,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132061622] [2024-11-22 13:54:24,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132061622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:24,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580578172] [2024-11-22 13:54:24,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:54:24,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:24,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:24,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:24,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 13:54:24,911 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:54:24,911 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:24,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 13:54:24,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:54:25,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:25,026 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:54:25,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-22 13:54:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:54:25,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580578172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:25,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:25,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-11-22 13:54:25,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543136422] [2024-11-22 13:54:25,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:25,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 13:54:25,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:25,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 13:54:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-22 13:54:25,115 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:25,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 160 flow. Second operand has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:25,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:25,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:25,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:25,472 INFO L124 PetriNetUnfolderBase]: 959/1670 cut-off events. [2024-11-22 13:54:25,472 INFO L125 PetriNetUnfolderBase]: For 1035/1035 co-relation queries the response was YES. [2024-11-22 13:54:25,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4075 conditions, 1670 events. 959/1670 cut-off events. For 1035/1035 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7476 event pairs, 140 based on Foata normal form. 4/1412 useless extension candidates. Maximal degree in co-relation 4064. Up to 300 conditions per place. [2024-11-22 13:54:25,478 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 82 selfloop transitions, 15 changer transitions 45/145 dead transitions. [2024-11-22 13:54:25,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 145 transitions, 738 flow [2024-11-22 13:54:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 13:54:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 13:54:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-11-22 13:54:25,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6396103896103896 [2024-11-22 13:54:25,480 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 160 flow. Second operand 11 states and 197 transitions. [2024-11-22 13:54:25,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 145 transitions, 738 flow [2024-11-22 13:54:25,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 145 transitions, 730 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-22 13:54:25,483 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 257 flow [2024-11-22 13:54:25,483 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=257, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2024-11-22 13:54:25,484 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2024-11-22 13:54:25,484 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 257 flow [2024-11-22 13:54:25,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:25,484 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:25,485 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:25,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 13:54:25,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:25,689 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:25,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:25,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1078660162, now seen corresponding path program 5 times [2024-11-22 13:54:25,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:25,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352239375] [2024-11-22 13:54:25,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:54:25,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:25,706 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 13:54:25,707 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:25,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:25,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352239375] [2024-11-22 13:54:25,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352239375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:25,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709778996] [2024-11-22 13:54:25,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:54:25,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:25,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:25,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:25,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 13:54:26,040 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 13:54:26,040 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:26,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 13:54:26,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:54:26,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:26,255 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:54:26,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-22 13:54:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:54:26,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709778996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:26,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:26,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 16 [2024-11-22 13:54:26,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669474833] [2024-11-22 13:54:26,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:26,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 13:54:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:26,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 13:54:26,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-22 13:54:26,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:26,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 257 flow. Second operand has 17 states, 17 states have (on average 9.235294117647058) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:26,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:26,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:26,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:26,817 INFO L124 PetriNetUnfolderBase]: 1039/1806 cut-off events. [2024-11-22 13:54:26,818 INFO L125 PetriNetUnfolderBase]: For 2026/2026 co-relation queries the response was YES. [2024-11-22 13:54:26,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4627 conditions, 1806 events. 1039/1806 cut-off events. For 2026/2026 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8259 event pairs, 68 based on Foata normal form. 1/1524 useless extension candidates. Maximal degree in co-relation 4611. Up to 325 conditions per place. [2024-11-22 13:54:26,824 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 106 selfloop transitions, 19 changer transitions 54/182 dead transitions. [2024-11-22 13:54:26,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 182 transitions, 961 flow [2024-11-22 13:54:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 13:54:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 13:54:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 265 transitions. [2024-11-22 13:54:26,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5567226890756303 [2024-11-22 13:54:26,826 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 257 flow. Second operand 17 states and 265 transitions. [2024-11-22 13:54:26,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 182 transitions, 961 flow [2024-11-22 13:54:26,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 182 transitions, 889 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-22 13:54:26,832 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 242 flow [2024-11-22 13:54:26,833 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=242, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2024-11-22 13:54:26,833 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 38 predicate places. [2024-11-22 13:54:26,833 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 242 flow [2024-11-22 13:54:26,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.235294117647058) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:26,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:26,834 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:26,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 13:54:27,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:27,038 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:27,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:27,041 INFO L85 PathProgramCache]: Analyzing trace with hash 427032896, now seen corresponding path program 6 times [2024-11-22 13:54:27,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:27,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064972486] [2024-11-22 13:54:27,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:54:27,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:27,067 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:54:27,067 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:54:27,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:27,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064972486] [2024-11-22 13:54:27,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064972486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:27,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306091546] [2024-11-22 13:54:27,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:54:27,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:27,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:27,129 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:27,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 13:54:27,183 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:54:27,184 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:27,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 13:54:27,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:54:27,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:54:27,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306091546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:27,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:27,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2024-11-22 13:54:27,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191022768] [2024-11-22 13:54:27,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:27,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 13:54:27,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 13:54:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-11-22 13:54:27,441 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:27,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 242 flow. Second operand has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:27,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:27,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:27,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:27,964 INFO L124 PetriNetUnfolderBase]: 2813/4919 cut-off events. [2024-11-22 13:54:27,964 INFO L125 PetriNetUnfolderBase]: For 3920/3920 co-relation queries the response was YES. [2024-11-22 13:54:27,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11913 conditions, 4919 events. 2813/4919 cut-off events. For 3920/3920 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 27798 event pairs, 632 based on Foata normal form. 74/4220 useless extension candidates. Maximal degree in co-relation 11897. Up to 1046 conditions per place. [2024-11-22 13:54:27,981 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 67 selfloop transitions, 27 changer transitions 85/182 dead transitions. [2024-11-22 13:54:27,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 182 transitions, 1138 flow [2024-11-22 13:54:27,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 13:54:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 13:54:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 225 transitions. [2024-11-22 13:54:27,982 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5739795918367347 [2024-11-22 13:54:27,982 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 242 flow. Second operand 14 states and 225 transitions. [2024-11-22 13:54:27,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 182 transitions, 1138 flow [2024-11-22 13:54:27,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 182 transitions, 1026 flow, removed 14 selfloop flow, removed 14 redundant places. [2024-11-22 13:54:27,993 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 387 flow [2024-11-22 13:54:27,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=387, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-11-22 13:54:27,995 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 41 predicate places. [2024-11-22 13:54:27,996 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 387 flow [2024-11-22 13:54:27,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:27,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:27,996 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:28,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-22 13:54:28,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:28,197 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:28,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:28,197 INFO L85 PathProgramCache]: Analyzing trace with hash -571173298, now seen corresponding path program 7 times [2024-11-22 13:54:28,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:28,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451280398] [2024-11-22 13:54:28,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:54:28,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:54:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:28,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451280398] [2024-11-22 13:54:28,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451280398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822754973] [2024-11-22 13:54:28,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:54:28,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:28,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:28,588 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:28,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 13:54:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:54:28,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-22 13:54:28,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:54:28,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:28,847 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:54:28,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-22 13:54:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 13:54:28,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822754973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:28,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:28,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 6] total 24 [2024-11-22 13:54:28,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694739790] [2024-11-22 13:54:28,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:28,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 13:54:28,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 13:54:28,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-11-22 13:54:28,903 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:28,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 387 flow. Second operand has 25 states, 25 states have (on average 8.36) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:28,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:28,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:28,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:30,391 INFO L124 PetriNetUnfolderBase]: 4103/7085 cut-off events. [2024-11-22 13:54:30,391 INFO L125 PetriNetUnfolderBase]: For 7012/7012 co-relation queries the response was YES. [2024-11-22 13:54:30,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18074 conditions, 7085 events. 4103/7085 cut-off events. For 7012/7012 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 40655 event pairs, 320 based on Foata normal form. 12/5994 useless extension candidates. Maximal degree in co-relation 18054. Up to 1300 conditions per place. [2024-11-22 13:54:30,422 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 281 selfloop transitions, 74 changer transitions 90/448 dead transitions. [2024-11-22 13:54:30,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 448 transitions, 2622 flow [2024-11-22 13:54:30,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-22 13:54:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-22 13:54:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 615 transitions. [2024-11-22 13:54:30,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-11-22 13:54:30,425 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 387 flow. Second operand 36 states and 615 transitions. [2024-11-22 13:54:30,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 448 transitions, 2622 flow [2024-11-22 13:54:30,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 448 transitions, 2542 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-11-22 13:54:30,441 INFO L231 Difference]: Finished difference. Result has 105 places, 96 transitions, 973 flow [2024-11-22 13:54:30,441 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=973, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2024-11-22 13:54:30,442 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2024-11-22 13:54:30,442 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 973 flow [2024-11-22 13:54:30,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.36) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:30,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:30,443 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:30,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 13:54:30,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:30,644 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:30,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash 327978890, now seen corresponding path program 8 times [2024-11-22 13:54:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:30,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405082508] [2024-11-22 13:54:30,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:54:30,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:30,664 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:54:30,664 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:30,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:30,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405082508] [2024-11-22 13:54:30,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405082508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:30,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289493973] [2024-11-22 13:54:30,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:54:30,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:30,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:30,938 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:30,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 13:54:31,044 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:54:31,045 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:31,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-22 13:54:31,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:54:31,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:31,330 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:54:31,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-22 13:54:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 13:54:31,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289493973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:31,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:31,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 25 [2024-11-22 13:54:31,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342237434] [2024-11-22 13:54:31,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:31,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-22 13:54:31,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:31,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-22 13:54:31,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2024-11-22 13:54:31,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:31,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 973 flow. Second operand has 26 states, 26 states have (on average 8.615384615384615) internal successors, (224), 26 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:31,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:31,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:31,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:32,852 INFO L124 PetriNetUnfolderBase]: 5493/9452 cut-off events. [2024-11-22 13:54:32,853 INFO L125 PetriNetUnfolderBase]: For 15522/15522 co-relation queries the response was YES. [2024-11-22 13:54:32,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24861 conditions, 9452 events. 5493/9452 cut-off events. For 15522/15522 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 57508 event pairs, 532 based on Foata normal form. 15/7999 useless extension candidates. Maximal degree in co-relation 24830. Up to 1855 conditions per place. [2024-11-22 13:54:32,894 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 139 selfloop transitions, 91 changer transitions 130/363 dead transitions. [2024-11-22 13:54:32,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 363 transitions, 2520 flow [2024-11-22 13:54:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 13:54:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-22 13:54:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 440 transitions. [2024-11-22 13:54:32,899 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-11-22 13:54:32,899 INFO L175 Difference]: Start difference. First operand has 105 places, 96 transitions, 973 flow. Second operand 27 states and 440 transitions. [2024-11-22 13:54:32,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 363 transitions, 2520 flow [2024-11-22 13:54:32,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 363 transitions, 2170 flow, removed 86 selfloop flow, removed 12 redundant places. [2024-11-22 13:54:32,951 INFO L231 Difference]: Finished difference. Result has 128 places, 112 transitions, 1166 flow [2024-11-22 13:54:32,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1166, PETRI_PLACES=128, PETRI_TRANSITIONS=112} [2024-11-22 13:54:32,951 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 101 predicate places. [2024-11-22 13:54:32,952 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 112 transitions, 1166 flow [2024-11-22 13:54:32,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.615384615384615) internal successors, (224), 26 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:32,952 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:32,952 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:32,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 13:54:33,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-22 13:54:33,154 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:33,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:33,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1189374657, now seen corresponding path program 9 times [2024-11-22 13:54:33,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:33,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830503525] [2024-11-22 13:54:33,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:54:33,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:33,180 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 13:54:33,180 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:54:33,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:33,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830503525] [2024-11-22 13:54:33,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830503525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:33,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184071598] [2024-11-22 13:54:33,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:54:33,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:33,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:33,272 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:33,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 13:54:33,415 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 13:54:33,416 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:33,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 13:54:33,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 13:54:33,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 13:54:33,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184071598] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:33,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:33,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2024-11-22 13:54:33,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059933447] [2024-11-22 13:54:33,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:33,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 13:54:33,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:33,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 13:54:33,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-22 13:54:33,498 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:33,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 112 transitions, 1166 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:33,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:33,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:33,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:34,698 INFO L124 PetriNetUnfolderBase]: 8419/14458 cut-off events. [2024-11-22 13:54:34,698 INFO L125 PetriNetUnfolderBase]: For 22064/22064 co-relation queries the response was YES. [2024-11-22 13:54:34,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38096 conditions, 14458 events. 8419/14458 cut-off events. For 22064/22064 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 95631 event pairs, 1700 based on Foata normal form. 22/12232 useless extension candidates. Maximal degree in co-relation 38058. Up to 3528 conditions per place. [2024-11-22 13:54:34,782 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 103 selfloop transitions, 105 changer transitions 0/211 dead transitions. [2024-11-22 13:54:34,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 211 transitions, 2482 flow [2024-11-22 13:54:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:54:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:54:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-11-22 13:54:34,784 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-22 13:54:34,784 INFO L175 Difference]: Start difference. First operand has 128 places, 112 transitions, 1166 flow. Second operand 6 states and 114 transitions. [2024-11-22 13:54:34,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 211 transitions, 2482 flow [2024-11-22 13:54:34,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 211 transitions, 2062 flow, removed 115 selfloop flow, removed 22 redundant places. [2024-11-22 13:54:34,859 INFO L231 Difference]: Finished difference. Result has 108 places, 155 transitions, 1704 flow [2024-11-22 13:54:34,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1704, PETRI_PLACES=108, PETRI_TRANSITIONS=155} [2024-11-22 13:54:34,860 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 81 predicate places. [2024-11-22 13:54:34,860 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 155 transitions, 1704 flow [2024-11-22 13:54:34,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:34,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:34,861 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:34,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 13:54:35,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 13:54:35,065 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:35,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1980071336, now seen corresponding path program 10 times [2024-11-22 13:54:35,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:35,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595683770] [2024-11-22 13:54:35,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:54:35,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:35,081 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:54:35,082 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:54:35,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:35,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595683770] [2024-11-22 13:54:35,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595683770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:35,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452654843] [2024-11-22 13:54:35,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:54:35,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:35,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:35,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:35,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 13:54:35,353 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:54:35,353 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:35,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-22 13:54:35,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:54:35,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:35,669 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:54:35,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-22 13:54:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:54:35,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452654843] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:35,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:35,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 10] total 26 [2024-11-22 13:54:35,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715967977] [2024-11-22 13:54:35,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:35,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 13:54:35,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:35,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 13:54:35,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-11-22 13:54:35,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:35,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 155 transitions, 1704 flow. Second operand has 27 states, 27 states have (on average 8.666666666666666) internal successors, (234), 27 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:35,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:35,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:35,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:37,956 INFO L124 PetriNetUnfolderBase]: 10157/17436 cut-off events. [2024-11-22 13:54:37,956 INFO L125 PetriNetUnfolderBase]: For 26671/26671 co-relation queries the response was YES. [2024-11-22 13:54:37,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46969 conditions, 17436 events. 10157/17436 cut-off events. For 26671/26671 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 117560 event pairs, 877 based on Foata normal form. 9/14735 useless extension candidates. Maximal degree in co-relation 46940. Up to 3200 conditions per place. [2024-11-22 13:54:38,013 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 265 selfloop transitions, 162 changer transitions 90/520 dead transitions. [2024-11-22 13:54:38,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 520 transitions, 4093 flow [2024-11-22 13:54:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-22 13:54:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-22 13:54:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 578 transitions. [2024-11-22 13:54:38,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-22 13:54:38,016 INFO L175 Difference]: Start difference. First operand has 108 places, 155 transitions, 1704 flow. Second operand 34 states and 578 transitions. [2024-11-22 13:54:38,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 520 transitions, 4093 flow [2024-11-22 13:54:38,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 520 transitions, 3991 flow, removed 51 selfloop flow, removed 0 redundant places. [2024-11-22 13:54:38,089 INFO L231 Difference]: Finished difference. Result has 150 places, 192 transitions, 2482 flow [2024-11-22 13:54:38,089 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2482, PETRI_PLACES=150, PETRI_TRANSITIONS=192} [2024-11-22 13:54:38,089 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 123 predicate places. [2024-11-22 13:54:38,089 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 192 transitions, 2482 flow [2024-11-22 13:54:38,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 8.666666666666666) internal successors, (234), 27 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:38,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:38,089 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:38,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 13:54:38,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 13:54:38,290 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:38,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:38,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2127821118, now seen corresponding path program 11 times [2024-11-22 13:54:38,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:38,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681937482] [2024-11-22 13:54:38,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:54:38,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:38,315 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-22 13:54:38,315 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:38,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:38,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681937482] [2024-11-22 13:54:38,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681937482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:38,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533731159] [2024-11-22 13:54:38,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:54:38,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:38,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:38,721 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:38,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 13:54:38,787 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-22 13:54:38,787 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:38,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-22 13:54:38,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:54:39,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:39,188 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:54:39,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-22 13:54:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:54:39,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533731159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:39,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:39,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 30 [2024-11-22 13:54:39,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287273108] [2024-11-22 13:54:39,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:39,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-22 13:54:39,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:39,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-22 13:54:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2024-11-22 13:54:39,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:39,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 192 transitions, 2482 flow. Second operand has 31 states, 31 states have (on average 8.451612903225806) internal successors, (262), 31 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:39,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:39,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:39,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:42,617 INFO L124 PetriNetUnfolderBase]: 12957/22204 cut-off events. [2024-11-22 13:54:42,617 INFO L125 PetriNetUnfolderBase]: For 46884/46884 co-relation queries the response was YES. [2024-11-22 13:54:42,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62047 conditions, 22204 events. 12957/22204 cut-off events. For 46884/46884 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 156406 event pairs, 716 based on Foata normal form. 1/18760 useless extension candidates. Maximal degree in co-relation 62008. Up to 4075 conditions per place. [2024-11-22 13:54:42,789 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 309 selfloop transitions, 218 changer transitions 93/623 dead transitions. [2024-11-22 13:54:42,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 623 transitions, 5618 flow [2024-11-22 13:54:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-22 13:54:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-22 13:54:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 645 transitions. [2024-11-22 13:54:42,792 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.606203007518797 [2024-11-22 13:54:42,792 INFO L175 Difference]: Start difference. First operand has 150 places, 192 transitions, 2482 flow. Second operand 38 states and 645 transitions. [2024-11-22 13:54:42,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 623 transitions, 5618 flow [2024-11-22 13:54:43,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 623 transitions, 5197 flow, removed 47 selfloop flow, removed 11 redundant places. [2024-11-22 13:54:43,174 INFO L231 Difference]: Finished difference. Result has 177 places, 240 transitions, 3109 flow [2024-11-22 13:54:43,175 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3109, PETRI_PLACES=177, PETRI_TRANSITIONS=240} [2024-11-22 13:54:43,175 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 150 predicate places. [2024-11-22 13:54:43,175 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 240 transitions, 3109 flow [2024-11-22 13:54:43,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.451612903225806) internal successors, (262), 31 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:43,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:43,176 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:43,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-22 13:54:43,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 13:54:43,376 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:43,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -748279792, now seen corresponding path program 12 times [2024-11-22 13:54:43,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:43,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140106537] [2024-11-22 13:54:43,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:54:43,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:43,527 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-22 13:54:43,527 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:44,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:44,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140106537] [2024-11-22 13:54:44,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140106537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:44,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559351080] [2024-11-22 13:54:44,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:54:44,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:44,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:44,221 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:44,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 13:54:44,383 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-22 13:54:44,383 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:54:44,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-22 13:54:44,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:54:44,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:44,704 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:54:44,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-22 13:54:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 13:54:44,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559351080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:44,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:44,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 8] total 32 [2024-11-22 13:54:44,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98338863] [2024-11-22 13:54:44,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:44,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-22 13:54:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-22 13:54:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2024-11-22 13:54:44,810 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:44,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 240 transitions, 3109 flow. Second operand has 33 states, 33 states have (on average 8.515151515151516) internal successors, (281), 33 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:44,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:44,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:44,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:54:53,034 INFO L124 PetriNetUnfolderBase]: 26970/46440 cut-off events. [2024-11-22 13:54:53,034 INFO L125 PetriNetUnfolderBase]: For 104643/104643 co-relation queries the response was YES. [2024-11-22 13:54:53,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128513 conditions, 46440 events. 26970/46440 cut-off events. For 104643/104643 co-relation queries the response was YES. Maximal size of possible extension queue 1047. Compared 369118 event pairs, 2853 based on Foata normal form. 348/39535 useless extension candidates. Maximal degree in co-relation 128472. Up to 8600 conditions per place. [2024-11-22 13:54:53,426 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 574 selfloop transitions, 351 changer transitions 644/1572 dead transitions. [2024-11-22 13:54:53,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 1572 transitions, 12807 flow [2024-11-22 13:54:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-11-22 13:54:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2024-11-22 13:54:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 1768 transitions. [2024-11-22 13:54:53,429 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6378066378066378 [2024-11-22 13:54:53,429 INFO L175 Difference]: Start difference. First operand has 177 places, 240 transitions, 3109 flow. Second operand 99 states and 1768 transitions. [2024-11-22 13:54:53,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 1572 transitions, 12807 flow [2024-11-22 13:54:53,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1572 transitions, 12510 flow, removed 37 selfloop flow, removed 14 redundant places. [2024-11-22 13:54:53,910 INFO L231 Difference]: Finished difference. Result has 286 places, 386 transitions, 5892 flow [2024-11-22 13:54:53,910 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=5892, PETRI_PLACES=286, PETRI_TRANSITIONS=386} [2024-11-22 13:54:53,910 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 259 predicate places. [2024-11-22 13:54:53,910 INFO L471 AbstractCegarLoop]: Abstraction has has 286 places, 386 transitions, 5892 flow [2024-11-22 13:54:53,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.515151515151516) internal successors, (281), 33 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:53,911 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:54:53,911 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:54:53,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-22 13:54:54,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 13:54:54,111 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:54:54,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:54:54,112 INFO L85 PathProgramCache]: Analyzing trace with hash 124905382, now seen corresponding path program 13 times [2024-11-22 13:54:54,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:54:54,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711874816] [2024-11-22 13:54:54,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:54:54,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:54:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:54:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:54:54,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:54:54,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711874816] [2024-11-22 13:54:54,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711874816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:54:54,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777434738] [2024-11-22 13:54:54,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:54:54,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:54:54,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:54:54,504 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:54:54,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 13:54:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:54:54,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-22 13:54:54,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:54:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 13:54:54,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:54:54,824 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:54:54,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-22 13:54:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 13:54:54,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777434738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:54:54,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:54:54,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 30 [2024-11-22 13:54:54,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321816603] [2024-11-22 13:54:54,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:54:54,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-22 13:54:54,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:54:54,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-22 13:54:54,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2024-11-22 13:54:54,896 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:54:54,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 386 transitions, 5892 flow. Second operand has 31 states, 31 states have (on average 8.64516129032258) internal successors, (268), 31 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:54:54,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:54:54,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:54:54,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:01,892 INFO L124 PetriNetUnfolderBase]: 26120/44650 cut-off events. [2024-11-22 13:55:01,892 INFO L125 PetriNetUnfolderBase]: For 172274/172274 co-relation queries the response was YES. [2024-11-22 13:55:02,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131841 conditions, 44650 events. 26120/44650 cut-off events. For 172274/172274 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 349510 event pairs, 2548 based on Foata normal form. 45/37762 useless extension candidates. Maximal degree in co-relation 131775. Up to 8225 conditions per place. [2024-11-22 13:55:02,560 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 235 selfloop transitions, 442 changer transitions 158/838 dead transitions. [2024-11-22 13:55:02,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 838 transitions, 9886 flow [2024-11-22 13:55:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-22 13:55:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-22 13:55:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 637 transitions. [2024-11-22 13:55:02,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5986842105263158 [2024-11-22 13:55:02,562 INFO L175 Difference]: Start difference. First operand has 286 places, 386 transitions, 5892 flow. Second operand 38 states and 637 transitions. [2024-11-22 13:55:02,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 838 transitions, 9886 flow [2024-11-22 13:55:04,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 838 transitions, 9000 flow, removed 378 selfloop flow, removed 22 redundant places. [2024-11-22 13:55:04,091 INFO L231 Difference]: Finished difference. Result has 284 places, 465 transitions, 8071 flow [2024-11-22 13:55:04,091 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5279, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8071, PETRI_PLACES=284, PETRI_TRANSITIONS=465} [2024-11-22 13:55:04,091 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 257 predicate places. [2024-11-22 13:55:04,092 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 465 transitions, 8071 flow [2024-11-22 13:55:04,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.64516129032258) internal successors, (268), 31 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:04,092 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:04,092 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:04,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 13:55:04,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 13:55:04,292 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:04,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:04,293 INFO L85 PathProgramCache]: Analyzing trace with hash -10149505, now seen corresponding path program 14 times [2024-11-22 13:55:04,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:04,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403681166] [2024-11-22 13:55:04,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:04,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:04,308 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:04,308 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 13:55:04,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:04,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403681166] [2024-11-22 13:55:04,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403681166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:04,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371148404] [2024-11-22 13:55:04,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:04,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:04,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:04,398 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:04,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 13:55:04,466 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:04,466 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:04,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 13:55:04,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-22 13:55:04,504 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-22 13:55:04,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371148404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:04,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:04,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2024-11-22 13:55:04,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075286515] [2024-11-22 13:55:04,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:04,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 13:55:04,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 13:55:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-22 13:55:04,553 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:55:04,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 465 transitions, 8071 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:04,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:04,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:55:04,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:14,254 INFO L124 PetriNetUnfolderBase]: 39894/68010 cut-off events. [2024-11-22 13:55:14,254 INFO L125 PetriNetUnfolderBase]: For 255688/255688 co-relation queries the response was YES. [2024-11-22 13:55:15,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206503 conditions, 68010 events. 39894/68010 cut-off events. For 255688/255688 co-relation queries the response was YES. Maximal size of possible extension queue 1490. Compared 566407 event pairs, 6631 based on Foata normal form. 22/57508 useless extension candidates. Maximal degree in co-relation 206435. Up to 16814 conditions per place. [2024-11-22 13:55:15,424 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 209 selfloop transitions, 508 changer transitions 0/720 dead transitions. [2024-11-22 13:55:15,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 720 transitions, 13782 flow [2024-11-22 13:55:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 13:55:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 13:55:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-22 13:55:15,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2024-11-22 13:55:15,425 INFO L175 Difference]: Start difference. First operand has 284 places, 465 transitions, 8071 flow. Second operand 7 states and 135 transitions. [2024-11-22 13:55:15,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 720 transitions, 13782 flow [2024-11-22 13:55:17,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 720 transitions, 13505 flow, removed 11 selfloop flow, removed 20 redundant places. [2024-11-22 13:55:17,196 INFO L231 Difference]: Finished difference. Result has 262 places, 650 transitions, 12861 flow [2024-11-22 13:55:17,197 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7890, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12861, PETRI_PLACES=262, PETRI_TRANSITIONS=650} [2024-11-22 13:55:17,197 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 235 predicate places. [2024-11-22 13:55:17,197 INFO L471 AbstractCegarLoop]: Abstraction has has 262 places, 650 transitions, 12861 flow [2024-11-22 13:55:17,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:17,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:17,197 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:17,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-22 13:55:17,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:17,398 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:17,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:17,398 INFO L85 PathProgramCache]: Analyzing trace with hash 624615532, now seen corresponding path program 15 times [2024-11-22 13:55:17,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:17,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48977822] [2024-11-22 13:55:17,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:17,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:17,536 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-22 13:55:17,537 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 13:55:17,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:17,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48977822] [2024-11-22 13:55:17,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48977822] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:17,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121948104] [2024-11-22 13:55:17,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:17,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:17,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:17,837 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:17,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 13:55:17,971 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-22 13:55:17,971 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:17,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 13:55:17,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:18,269 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:55:18,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-22 13:55:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 13:55:18,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:18,302 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:55:18,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-22 13:55:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 13:55:18,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121948104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:18,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:18,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2024-11-22 13:55:18,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920945961] [2024-11-22 13:55:18,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:18,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-22 13:55:18,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:18,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-22 13:55:18,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2024-11-22 13:55:18,689 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-22 13:55:18,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 650 transitions, 12861 flow. Second operand has 38 states, 38 states have (on average 7.7368421052631575) internal successors, (294), 38 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:18,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:18,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-22 13:55:18,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand