./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:44:39,913 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:44:39,988 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:44:39,994 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:44:39,994 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:44:40,017 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:44:40,018 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:44:40,018 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:44:40,019 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:44:40,019 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:44:40,019 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:44:40,021 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:44:40,022 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:44:40,022 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:44:40,024 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:44:40,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:44:40,024 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:44:40,025 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:44:40,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:44:40,025 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:44:40,025 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:44:40,026 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:44:40,028 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:44:40,029 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:44:40,029 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:44:40,029 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:44:40,029 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:44:40,030 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:44:40,030 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:44:40,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:44:40,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:44:40,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:44:40,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:44:40,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:44:40,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:44:40,032 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:44:40,032 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:44:40,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:44:40,032 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:44:40,032 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:44:40,033 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:44:40,033 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:44:40,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-11-20 09:44:40,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:44:40,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:44:40,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:44:40,252 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:44:40,252 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:44:40,253 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-20 09:44:41,475 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:44:41,631 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:44:41,631 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-20 09:44:41,637 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa0392afd/80762d4286834a03afa627493b89a26c/FLAGf408e064b [2024-11-20 09:44:41,648 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa0392afd/80762d4286834a03afa627493b89a26c [2024-11-20 09:44:41,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:44:41,651 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:44:41,651 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:44:41,652 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:44:41,655 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:44:41,656 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:41,656 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40f98ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41, skipping insertion in model container [2024-11-20 09:44:41,657 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:41,677 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:44:41,848 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/popl20-send-receive-alt.wvr.c[2676,2689] [2024-11-20 09:44:41,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:44:41,870 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:44:41,889 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/popl20-send-receive-alt.wvr.c[2676,2689] [2024-11-20 09:44:41,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:44:41,908 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:44:41,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41 WrapperNode [2024-11-20 09:44:41,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:44:41,911 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:44:41,911 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:44:41,911 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:44:41,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:41,924 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:41,952 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 139 [2024-11-20 09:44:41,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:44:41,953 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:44:41,953 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:44:41,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:44:41,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:41,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:41,967 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:41,991 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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]. [2024-11-20 09:44:41,992 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:41,993 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:42,001 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:42,004 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:42,005 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:42,006 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:42,008 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:44:42,011 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:44:42,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:44:42,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:44:42,012 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (1/1) ... [2024-11-20 09:44:42,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:44:42,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:42,040 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) [2024-11-20 09:44:42,042 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 [2024-11-20 09:44:42,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:44:42,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:44:42,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:44:42,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:44:42,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:44:42,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:44:42,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 09:44:42,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 09:44:42,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 09:44:42,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 09:44:42,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 09:44:42,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 09:44:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:44:42,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:44:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 09:44:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 09:44:42,080 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:44:42,157 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:44:42,158 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:44:42,394 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:44:42,394 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:44:42,593 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:44:42,594 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-20 09:44:42,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:44:42 BoogieIcfgContainer [2024-11-20 09:44:42,594 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:44:42,596 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:44:42,596 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:44:42,599 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:44:42,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:44:41" (1/3) ... [2024-11-20 09:44:42,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77aae6ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:44:42, skipping insertion in model container [2024-11-20 09:44:42,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:44:41" (2/3) ... [2024-11-20 09:44:42,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77aae6ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:44:42, skipping insertion in model container [2024-11-20 09:44:42,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:44:42" (3/3) ... [2024-11-20 09:44:42,601 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-11-20 09:44:42,614 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:44:42,615 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:44:42,615 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:44:42,653 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 09:44:42,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 32 transitions, 78 flow [2024-11-20 09:44:42,696 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2024-11-20 09:44:42,697 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:44:42,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 30 events. 6/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-20 09:44:42,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 32 transitions, 78 flow [2024-11-20 09:44:42,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 29 transitions, 70 flow [2024-11-20 09:44:42,707 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:44:42,717 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;@3f348259, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:44:42,717 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-20 09:44:42,726 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:44:42,727 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-11-20 09:44:42,727 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:44:42,727 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:42,728 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:42,728 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:42,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:42,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1889599126, now seen corresponding path program 1 times [2024-11-20 09:44:42,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:42,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81601942] [2024-11-20 09:44:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:42,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:42,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:42,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81601942] [2024-11-20 09:44:42,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81601942] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:44:42,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:44:42,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:44:42,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437148717] [2024-11-20 09:44:42,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:42,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-20 09:44:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-20 09:44:42,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-20 09:44:42,933 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:44:42,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 70 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:42,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:42,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:44:42,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:43,024 INFO L124 PetriNetUnfolderBase]: 158/290 cut-off events. [2024-11-20 09:44:43,025 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-20 09:44:43,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 290 events. 158/290 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1053 event pairs, 116 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 513. Up to 253 conditions per place. [2024-11-20 09:44:43,029 INFO L140 encePairwiseOnDemand]: 30/32 looper letters, 22 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2024-11-20 09:44:43,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 110 flow [2024-11-20 09:44:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-20 09:44:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-20 09:44:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 38 transitions. [2024-11-20 09:44:43,039 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-11-20 09:44:43,041 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 70 flow. Second operand 2 states and 38 transitions. [2024-11-20 09:44:43,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 110 flow [2024-11-20 09:44:43,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 09:44:43,045 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 58 flow [2024-11-20 09:44:43,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2024-11-20 09:44:43,050 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2024-11-20 09:44:43,051 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 58 flow [2024-11-20 09:44:43,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:43,052 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:43,052 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:43,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:44:43,053 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:43,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1159708757, now seen corresponding path program 1 times [2024-11-20 09:44:43,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:43,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651980405] [2024-11-20 09:44:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:43,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:43,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:43,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651980405] [2024-11-20 09:44:43,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651980405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:44:43,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:44:43,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:44:43,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890929861] [2024-11-20 09:44:43,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:43,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:44:43,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:44:43,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:44:43,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:44:43,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:43,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:43,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:44:43,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:43,300 INFO L124 PetriNetUnfolderBase]: 256/457 cut-off events. [2024-11-20 09:44:43,300 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-20 09:44:43,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 457 events. 256/457 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1837 event pairs, 96 based on Foata normal form. 1/393 useless extension candidates. Maximal degree in co-relation 893. Up to 228 conditions per place. [2024-11-20 09:44:43,303 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 34 selfloop transitions, 2 changer transitions 3/44 dead transitions. [2024-11-20 09:44:43,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 44 transitions, 173 flow [2024-11-20 09:44:43,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:44:43,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:44:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-11-20 09:44:43,304 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-11-20 09:44:43,304 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 58 flow. Second operand 3 states and 61 transitions. [2024-11-20 09:44:43,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 44 transitions, 173 flow [2024-11-20 09:44:43,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 09:44:43,306 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 70 flow [2024-11-20 09:44:43,306 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2024-11-20 09:44:43,307 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2024-11-20 09:44:43,307 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 70 flow [2024-11-20 09:44:43,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:43,307 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:43,307 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] [2024-11-20 09:44:43,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:44:43,308 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:43,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:43,308 INFO L85 PathProgramCache]: Analyzing trace with hash -930542238, now seen corresponding path program 1 times [2024-11-20 09:44:43,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:43,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111342185] [2024-11-20 09:44:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:43,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:43,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:43,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111342185] [2024-11-20 09:44:43,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111342185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:44:43,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:44:43,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:44:43,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741042813] [2024-11-20 09:44:43,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:43,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:44:43,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:43,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:44:43,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:44:43,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:44:43,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:43,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:43,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:44:43,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:43,488 INFO L124 PetriNetUnfolderBase]: 287/534 cut-off events. [2024-11-20 09:44:43,489 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-20 09:44:43,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 534 events. 287/534 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2139 event pairs, 126 based on Foata normal form. 14/459 useless extension candidates. Maximal degree in co-relation 1051. Up to 318 conditions per place. [2024-11-20 09:44:43,494 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 27 selfloop transitions, 3 changer transitions 6/41 dead transitions. [2024-11-20 09:44:43,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 170 flow [2024-11-20 09:44:43,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:44:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:44:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-11-20 09:44:43,495 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-11-20 09:44:43,497 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 70 flow. Second operand 3 states and 57 transitions. [2024-11-20 09:44:43,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 170 flow [2024-11-20 09:44:43,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:44:43,498 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 87 flow [2024-11-20 09:44:43,498 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-11-20 09:44:43,499 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2024-11-20 09:44:43,499 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 87 flow [2024-11-20 09:44:43,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:43,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:43,499 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, 1] [2024-11-20 09:44:43,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:44:43,502 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:43,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:43,502 INFO L85 PathProgramCache]: Analyzing trace with hash -487430840, now seen corresponding path program 1 times [2024-11-20 09:44:43,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:43,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888896206] [2024-11-20 09:44:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:43,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:43,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:43,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888896206] [2024-11-20 09:44:43,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888896206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:44:43,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:44:43,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:44:43,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54953109] [2024-11-20 09:44:43,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:43,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:44:43,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:43,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:44:43,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:44:43,634 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:44:43,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:43,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:43,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:44:43,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:43,729 INFO L124 PetriNetUnfolderBase]: 355/668 cut-off events. [2024-11-20 09:44:43,729 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2024-11-20 09:44:43,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 668 events. 355/668 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2928 event pairs, 289 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 1416. Up to 480 conditions per place. [2024-11-20 09:44:43,731 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 24 selfloop transitions, 2 changer transitions 15/46 dead transitions. [2024-11-20 09:44:43,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 205 flow [2024-11-20 09:44:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:44:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:44:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-20 09:44:43,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-11-20 09:44:43,734 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 87 flow. Second operand 4 states and 67 transitions. [2024-11-20 09:44:43,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 205 flow [2024-11-20 09:44:43,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:44:43,736 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 98 flow [2024-11-20 09:44:43,736 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-11-20 09:44:43,737 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-11-20 09:44:43,738 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 98 flow [2024-11-20 09:44:43,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:43,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:43,738 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, 1, 1] [2024-11-20 09:44:43,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:44:43,738 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:43,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:43,739 INFO L85 PathProgramCache]: Analyzing trace with hash 909190841, now seen corresponding path program 1 times [2024-11-20 09:44:43,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:43,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345518089] [2024-11-20 09:44:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:43,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:44,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:44,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345518089] [2024-11-20 09:44:44,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345518089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:44,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399141538] [2024-11-20 09:44:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:44,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:44,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:44,405 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) [2024-11-20 09:44:44,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:44:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:44,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-20 09:44:44,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:44,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-20 09:44:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:44,844 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:45,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-20 09:44:45,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:44:45,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-20 09:44:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:45,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399141538] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:45,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:45,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-20 09:44:45,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394206894] [2024-11-20 09:44:45,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:45,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:44:45,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:44:45,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:44:45,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:44:45,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 98 flow. Second operand has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:45,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:45,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:44:45,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:46,382 INFO L124 PetriNetUnfolderBase]: 1195/2237 cut-off events. [2024-11-20 09:44:46,382 INFO L125 PetriNetUnfolderBase]: For 494/494 co-relation queries the response was YES. [2024-11-20 09:44:46,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4794 conditions, 2237 events. 1195/2237 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12321 event pairs, 330 based on Foata normal form. 19/2012 useless extension candidates. Maximal degree in co-relation 4786. Up to 500 conditions per place. [2024-11-20 09:44:46,393 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 116 selfloop transitions, 28 changer transitions 30/179 dead transitions. [2024-11-20 09:44:46,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 179 transitions, 852 flow [2024-11-20 09:44:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 09:44:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 09:44:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 281 transitions. [2024-11-20 09:44:46,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5854166666666667 [2024-11-20 09:44:46,396 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 98 flow. Second operand 15 states and 281 transitions. [2024-11-20 09:44:46,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 179 transitions, 852 flow [2024-11-20 09:44:46,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 179 transitions, 828 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-20 09:44:46,402 INFO L231 Difference]: Finished difference. Result has 55 places, 63 transitions, 353 flow [2024-11-20 09:44:46,402 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=353, PETRI_PLACES=55, PETRI_TRANSITIONS=63} [2024-11-20 09:44:46,404 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-11-20 09:44:46,405 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 63 transitions, 353 flow [2024-11-20 09:44:46,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:46,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:46,405 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, 1, 1] [2024-11-20 09:44:46,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 09:44:46,606 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 [2024-11-20 09:44:46,606 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:46,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:46,607 INFO L85 PathProgramCache]: Analyzing trace with hash 110229209, now seen corresponding path program 1 times [2024-11-20 09:44:46,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:46,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080218984] [2024-11-20 09:44:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:46,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:46,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:46,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080218984] [2024-11-20 09:44:46,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080218984] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:44:46,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:44:46,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:44:46,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845539121] [2024-11-20 09:44:46,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:46,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:44:46,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:46,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:44:46,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:44:46,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-11-20 09:44:46,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 63 transitions, 353 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:46,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:46,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-11-20 09:44:46,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:46,824 INFO L124 PetriNetUnfolderBase]: 1252/2195 cut-off events. [2024-11-20 09:44:46,824 INFO L125 PetriNetUnfolderBase]: For 1271/1271 co-relation queries the response was YES. [2024-11-20 09:44:46,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5355 conditions, 2195 events. 1252/2195 cut-off events. For 1271/1271 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 11149 event pairs, 765 based on Foata normal form. 22/2064 useless extension candidates. Maximal degree in co-relation 5340. Up to 1734 conditions per place. [2024-11-20 09:44:46,833 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 62 selfloop transitions, 2 changer transitions 3/70 dead transitions. [2024-11-20 09:44:46,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 486 flow [2024-11-20 09:44:46,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:44:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:44:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-11-20 09:44:46,835 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-20 09:44:46,835 INFO L175 Difference]: Start difference. First operand has 55 places, 63 transitions, 353 flow. Second operand 3 states and 54 transitions. [2024-11-20 09:44:46,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 486 flow [2024-11-20 09:44:46,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 442 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-11-20 09:44:46,843 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 250 flow [2024-11-20 09:44:46,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-11-20 09:44:46,845 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-11-20 09:44:46,845 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 250 flow [2024-11-20 09:44:46,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:46,845 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:46,845 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:46,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 09:44:46,845 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:46,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:46,846 INFO L85 PathProgramCache]: Analyzing trace with hash -507859114, now seen corresponding path program 2 times [2024-11-20 09:44:46,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:46,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976791572] [2024-11-20 09:44:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:46,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:47,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:47,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976791572] [2024-11-20 09:44:47,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976791572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:47,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025144665] [2024-11-20 09:44:47,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:44:47,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:47,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:47,377 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) [2024-11-20 09:44:47,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:44:47,435 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:44:47,436 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:47,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 09:44:47,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:47,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:47,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:44:47,570 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 40 treesize of output 24 [2024-11-20 09:44:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:47,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025144665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:47,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:47,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 13 [2024-11-20 09:44:47,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419349786] [2024-11-20 09:44:47,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:47,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 09:44:47,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:47,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 09:44:47,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:44:47,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:44:47,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 250 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:47,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:47,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:44:47,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:47,964 INFO L124 PetriNetUnfolderBase]: 1143/2115 cut-off events. [2024-11-20 09:44:47,964 INFO L125 PetriNetUnfolderBase]: For 1087/1087 co-relation queries the response was YES. [2024-11-20 09:44:47,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5136 conditions, 2115 events. 1143/2115 cut-off events. For 1087/1087 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11300 event pairs, 309 based on Foata normal form. 1/1968 useless extension candidates. Maximal degree in co-relation 5119. Up to 673 conditions per place. [2024-11-20 09:44:47,974 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 73 selfloop transitions, 14 changer transitions 16/109 dead transitions. [2024-11-20 09:44:47,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 625 flow [2024-11-20 09:44:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:44:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:44:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-11-20 09:44:47,976 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-11-20 09:44:47,976 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 250 flow. Second operand 9 states and 147 transitions. [2024-11-20 09:44:47,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 625 flow [2024-11-20 09:44:47,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 109 transitions, 622 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:44:47,980 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 316 flow [2024-11-20 09:44:47,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-11-20 09:44:47,980 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-11-20 09:44:47,981 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 316 flow [2024-11-20 09:44:47,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:47,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:47,981 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, 1, 1] [2024-11-20 09:44:47,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 09:44:48,181 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,SelfDestructingSolverStorable6 [2024-11-20 09:44:48,182 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:48,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:48,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1977149039, now seen corresponding path program 3 times [2024-11-20 09:44:48,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:48,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893474043] [2024-11-20 09:44:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:48,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:48,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:48,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893474043] [2024-11-20 09:44:48,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893474043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:48,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273926383] [2024-11-20 09:44:48,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:44:48,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:48,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:48,255 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) [2024-11-20 09:44:48,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:44:48,324 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 09:44:48,324 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:48,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 09:44:48,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 09:44:48,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:48,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273926383] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:48,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:48,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-11-20 09:44:48,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578713640] [2024-11-20 09:44:48,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:48,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 09:44:48,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:48,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 09:44:48,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-20 09:44:48,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:44:48,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 316 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:48,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:48,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:44:48,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:48,699 INFO L124 PetriNetUnfolderBase]: 1943/3679 cut-off events. [2024-11-20 09:44:48,699 INFO L125 PetriNetUnfolderBase]: For 2560/2560 co-relation queries the response was YES. [2024-11-20 09:44:48,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8983 conditions, 3679 events. 1943/3679 cut-off events. For 2560/2560 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 22067 event pairs, 752 based on Foata normal form. 40/3481 useless extension candidates. Maximal degree in co-relation 8964. Up to 1434 conditions per place. [2024-11-20 09:44:48,714 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 72 selfloop transitions, 23 changer transitions 0/101 dead transitions. [2024-11-20 09:44:48,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 101 transitions, 716 flow [2024-11-20 09:44:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:44:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:44:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-11-20 09:44:48,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-20 09:44:48,716 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 316 flow. Second operand 4 states and 80 transitions. [2024-11-20 09:44:48,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 101 transitions, 716 flow [2024-11-20 09:44:48,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 655 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-11-20 09:44:48,726 INFO L231 Difference]: Finished difference. Result has 62 places, 76 transitions, 506 flow [2024-11-20 09:44:48,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=506, PETRI_PLACES=62, PETRI_TRANSITIONS=76} [2024-11-20 09:44:48,727 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-11-20 09:44:48,727 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 76 transitions, 506 flow [2024-11-20 09:44:48,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:48,728 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:48,728 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:48,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 09:44:48,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:48,929 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:48,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:48,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1805096591, now seen corresponding path program 4 times [2024-11-20 09:44:48,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:48,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671610046] [2024-11-20 09:44:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:48,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:49,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:49,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671610046] [2024-11-20 09:44:49,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671610046] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:44:49,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:44:49,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:44:49,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156673692] [2024-11-20 09:44:49,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:49,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:44:49,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:49,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:44:49,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:44:49,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 32 [2024-11-20 09:44:49,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 76 transitions, 506 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:49,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:49,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 32 [2024-11-20 09:44:49,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:49,384 INFO L124 PetriNetUnfolderBase]: 2701/4703 cut-off events. [2024-11-20 09:44:49,384 INFO L125 PetriNetUnfolderBase]: For 4078/4078 co-relation queries the response was YES. [2024-11-20 09:44:49,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12381 conditions, 4703 events. 2701/4703 cut-off events. For 4078/4078 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 25585 event pairs, 542 based on Foata normal form. 242/4588 useless extension candidates. Maximal degree in co-relation 12362. Up to 2391 conditions per place. [2024-11-20 09:44:49,403 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 80 selfloop transitions, 4 changer transitions 4/90 dead transitions. [2024-11-20 09:44:49,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 90 transitions, 752 flow [2024-11-20 09:44:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:44:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:44:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-11-20 09:44:49,404 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2024-11-20 09:44:49,404 INFO L175 Difference]: Start difference. First operand has 62 places, 76 transitions, 506 flow. Second operand 4 states and 63 transitions. [2024-11-20 09:44:49,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 90 transitions, 752 flow [2024-11-20 09:44:49,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 742 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-20 09:44:49,409 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 406 flow [2024-11-20 09:44:49,409 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=406, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-11-20 09:44:49,410 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-11-20 09:44:49,410 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 406 flow [2024-11-20 09:44:49,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:49,410 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:49,410 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, 1, 1, 1, 1] [2024-11-20 09:44:49,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 09:44:49,411 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:49,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:49,411 INFO L85 PathProgramCache]: Analyzing trace with hash -926560523, now seen corresponding path program 1 times [2024-11-20 09:44:49,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:49,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595629820] [2024-11-20 09:44:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:49,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:50,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:50,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595629820] [2024-11-20 09:44:50,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595629820] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:50,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617626632] [2024-11-20 09:44:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:50,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:50,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:50,116 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) [2024-11-20 09:44:50,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 09:44:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:50,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-20 09:44:50,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:50,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:50,765 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:44:50,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-20 09:44:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:51,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617626632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:51,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:51,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2024-11-20 09:44:51,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141299269] [2024-11-20 09:44:51,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:51,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-20 09:44:51,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:51,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-20 09:44:51,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2024-11-20 09:44:51,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:44:51,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 406 flow. Second operand has 30 states, 30 states have (on average 9.7) internal successors, (291), 30 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:51,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:51,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:44:51,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:53,608 INFO L124 PetriNetUnfolderBase]: 4783/9190 cut-off events. [2024-11-20 09:44:53,608 INFO L125 PetriNetUnfolderBase]: For 11315/11323 co-relation queries the response was YES. [2024-11-20 09:44:53,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24927 conditions, 9190 events. 4783/9190 cut-off events. For 11315/11323 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 62064 event pairs, 881 based on Foata normal form. 67/8628 useless extension candidates. Maximal degree in co-relation 24906. Up to 1545 conditions per place. [2024-11-20 09:44:53,657 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 254 selfloop transitions, 98 changer transitions 125/484 dead transitions. [2024-11-20 09:44:53,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 484 transitions, 2933 flow [2024-11-20 09:44:53,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-20 09:44:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-20 09:44:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 748 transitions. [2024-11-20 09:44:53,661 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-11-20 09:44:53,661 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 406 flow. Second operand 42 states and 748 transitions. [2024-11-20 09:44:53,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 484 transitions, 2933 flow [2024-11-20 09:44:53,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 484 transitions, 2927 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-20 09:44:53,677 INFO L231 Difference]: Finished difference. Result has 118 places, 154 transitions, 1564 flow [2024-11-20 09:44:53,677 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1564, PETRI_PLACES=118, PETRI_TRANSITIONS=154} [2024-11-20 09:44:53,677 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-11-20 09:44:53,677 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 154 transitions, 1564 flow [2024-11-20 09:44:53,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.7) internal successors, (291), 30 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:53,678 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:53,678 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, 1, 1, 1, 1] [2024-11-20 09:44:53,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:53,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:53,879 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:53,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1337116099, now seen corresponding path program 2 times [2024-11-20 09:44:53,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:53,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82516109] [2024-11-20 09:44:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:53,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:54,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:54,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82516109] [2024-11-20 09:44:54,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82516109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:54,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300064201] [2024-11-20 09:44:54,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:44:54,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:54,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:54,715 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) [2024-11-20 09:44:54,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 09:44:54,776 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:44:54,776 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:54,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 09:44:54,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:55,151 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-20 09:44:55,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-11-20 09:44:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:55,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:55,455 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-20 09:44:55,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-11-20 09:44:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:56,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300064201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:56,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:56,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-11-20 09:44:56,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302498959] [2024-11-20 09:44:56,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:56,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-20 09:44:56,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:56,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-20 09:44:56,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2024-11-20 09:44:56,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:44:56,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 154 transitions, 1564 flow. Second operand has 29 states, 29 states have (on average 9.89655172413793) internal successors, (287), 29 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:56,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:56,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:44:56,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:59,483 INFO L124 PetriNetUnfolderBase]: 10358/19958 cut-off events. [2024-11-20 09:44:59,483 INFO L125 PetriNetUnfolderBase]: For 44512/44512 co-relation queries the response was YES. [2024-11-20 09:44:59,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58671 conditions, 19958 events. 10358/19958 cut-off events. For 44512/44512 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 152397 event pairs, 2347 based on Foata normal form. 35/18666 useless extension candidates. Maximal degree in co-relation 58635. Up to 3300 conditions per place. [2024-11-20 09:44:59,579 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 348 selfloop transitions, 173 changer transitions 83/611 dead transitions. [2024-11-20 09:44:59,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 611 transitions, 5515 flow [2024-11-20 09:44:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-20 09:44:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-20 09:44:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 604 transitions. [2024-11-20 09:44:59,581 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.571969696969697 [2024-11-20 09:44:59,581 INFO L175 Difference]: Start difference. First operand has 118 places, 154 transitions, 1564 flow. Second operand 33 states and 604 transitions. [2024-11-20 09:44:59,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 611 transitions, 5515 flow [2024-11-20 09:44:59,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 611 transitions, 4731 flow, removed 385 selfloop flow, removed 5 redundant places. [2024-11-20 09:44:59,709 INFO L231 Difference]: Finished difference. Result has 160 places, 269 transitions, 3032 flow [2024-11-20 09:44:59,710 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3032, PETRI_PLACES=160, PETRI_TRANSITIONS=269} [2024-11-20 09:44:59,710 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-11-20 09:44:59,710 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 269 transitions, 3032 flow [2024-11-20 09:44:59,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.89655172413793) internal successors, (287), 29 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:59,711 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:59,711 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:59,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:59,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-20 09:44:59,914 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:59,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:59,914 INFO L85 PathProgramCache]: Analyzing trace with hash 2122004758, now seen corresponding path program 3 times [2024-11-20 09:44:59,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:59,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309391001] [2024-11-20 09:44:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:59,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:00,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:00,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309391001] [2024-11-20 09:45:00,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309391001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:00,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707173844] [2024-11-20 09:45:00,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:45:00,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:00,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:01,000 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) [2024-11-20 09:45:01,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 09:45:01,073 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-20 09:45:01,073 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:01,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:45:01,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:45:01,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:01,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:45:01,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-20 09:45:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 09:45:01,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707173844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:01,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:01,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 21 [2024-11-20 09:45:01,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654337272] [2024-11-20 09:45:01,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:01,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 09:45:01,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 09:45:01,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2024-11-20 09:45:01,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:45:01,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 269 transitions, 3032 flow. Second operand has 22 states, 22 states have (on average 10.818181818181818) internal successors, (238), 22 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:01,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:01,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:45:01,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:04,507 INFO L124 PetriNetUnfolderBase]: 10851/20850 cut-off events. [2024-11-20 09:45:04,507 INFO L125 PetriNetUnfolderBase]: For 67966/67966 co-relation queries the response was YES. [2024-11-20 09:45:04,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64834 conditions, 20850 events. 10851/20850 cut-off events. For 67966/67966 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 160740 event pairs, 4422 based on Foata normal form. 2/19460 useless extension candidates. Maximal degree in co-relation 64782. Up to 13638 conditions per place. [2024-11-20 09:45:04,641 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 302 selfloop transitions, 53 changer transitions 53/415 dead transitions. [2024-11-20 09:45:04,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 415 transitions, 4493 flow [2024-11-20 09:45:04,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 09:45:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 09:45:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 292 transitions. [2024-11-20 09:45:04,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5367647058823529 [2024-11-20 09:45:04,647 INFO L175 Difference]: Start difference. First operand has 160 places, 269 transitions, 3032 flow. Second operand 17 states and 292 transitions. [2024-11-20 09:45:04,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 415 transitions, 4493 flow [2024-11-20 09:45:05,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 415 transitions, 4104 flow, removed 173 selfloop flow, removed 14 redundant places. [2024-11-20 09:45:05,095 INFO L231 Difference]: Finished difference. Result has 165 places, 278 transitions, 2887 flow [2024-11-20 09:45:05,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2643, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2887, PETRI_PLACES=165, PETRI_TRANSITIONS=278} [2024-11-20 09:45:05,096 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-11-20 09:45:05,096 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 278 transitions, 2887 flow [2024-11-20 09:45:05,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.818181818181818) internal successors, (238), 22 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:05,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:05,096 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:05,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 09:45:05,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:05,298 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:05,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:05,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2084958078, now seen corresponding path program 4 times [2024-11-20 09:45:05,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:05,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723128878] [2024-11-20 09:45:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:05,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:06,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:06,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723128878] [2024-11-20 09:45:06,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723128878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:06,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213741540] [2024-11-20 09:45:06,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:45:06,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:06,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:06,163 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) [2024-11-20 09:45:06,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 09:45:06,222 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:45:06,223 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:06,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:45:06,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:45:06,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:06,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:45:06,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-20 09:45:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 09:45:06,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213741540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:06,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:06,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 6] total 22 [2024-11-20 09:45:06,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754678094] [2024-11-20 09:45:06,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:06,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 09:45:06,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:06,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 09:45:06,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-11-20 09:45:06,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:45:06,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 278 transitions, 2887 flow. Second operand has 23 states, 23 states have (on average 10.652173913043478) internal successors, (245), 23 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:06,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:06,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:45:06,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:09,812 INFO L124 PetriNetUnfolderBase]: 11401/21903 cut-off events. [2024-11-20 09:45:09,813 INFO L125 PetriNetUnfolderBase]: For 66112/66112 co-relation queries the response was YES. [2024-11-20 09:45:09,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67114 conditions, 21903 events. 11401/21903 cut-off events. For 66112/66112 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 170860 event pairs, 4392 based on Foata normal form. 4/20445 useless extension candidates. Maximal degree in co-relation 67061. Up to 12750 conditions per place. [2024-11-20 09:45:09,983 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 298 selfloop transitions, 71 changer transitions 60/436 dead transitions. [2024-11-20 09:45:09,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 436 transitions, 4441 flow [2024-11-20 09:45:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 09:45:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 09:45:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 324 transitions. [2024-11-20 09:45:09,984 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5328947368421053 [2024-11-20 09:45:09,984 INFO L175 Difference]: Start difference. First operand has 165 places, 278 transitions, 2887 flow. Second operand 19 states and 324 transitions. [2024-11-20 09:45:09,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 436 transitions, 4441 flow [2024-11-20 09:45:10,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 436 transitions, 4329 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-11-20 09:45:10,341 INFO L231 Difference]: Finished difference. Result has 180 places, 286 transitions, 3099 flow [2024-11-20 09:45:10,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3099, PETRI_PLACES=180, PETRI_TRANSITIONS=286} [2024-11-20 09:45:10,342 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-11-20 09:45:10,343 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 286 transitions, 3099 flow [2024-11-20 09:45:10,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.652173913043478) internal successors, (245), 23 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:10,343 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:10,343 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, 1, 1, 1, 1] [2024-11-20 09:45:10,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 09:45:10,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:10,544 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:10,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:10,545 INFO L85 PathProgramCache]: Analyzing trace with hash -244335542, now seen corresponding path program 5 times [2024-11-20 09:45:10,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:10,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851378259] [2024-11-20 09:45:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:10,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:45:10,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851378259] [2024-11-20 09:45:10,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851378259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:10,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457036279] [2024-11-20 09:45:10,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:45:10,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:10,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:10,637 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) [2024-11-20 09:45:10,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 09:45:10,704 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-20 09:45:10,704 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:10,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:45:10,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 09:45:10,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:45:10,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457036279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:10,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:10,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2024-11-20 09:45:10,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147191568] [2024-11-20 09:45:10,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:10,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 09:45:10,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 09:45:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2024-11-20 09:45:10,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:45:10,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 286 transitions, 3099 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:10,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:10,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:45:10,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:14,546 INFO L124 PetriNetUnfolderBase]: 14785/28730 cut-off events. [2024-11-20 09:45:14,546 INFO L125 PetriNetUnfolderBase]: For 97610/97610 co-relation queries the response was YES. [2024-11-20 09:45:14,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89581 conditions, 28730 events. 14785/28730 cut-off events. For 97610/97610 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 232814 event pairs, 4020 based on Foata normal form. 136/26965 useless extension candidates. Maximal degree in co-relation 89525. Up to 11254 conditions per place. [2024-11-20 09:45:14,765 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 208 selfloop transitions, 179 changer transitions 0/394 dead transitions. [2024-11-20 09:45:14,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 394 transitions, 5047 flow [2024-11-20 09:45:14,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:45:14,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:45:14,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-11-20 09:45:14,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-11-20 09:45:14,766 INFO L175 Difference]: Start difference. First operand has 180 places, 286 transitions, 3099 flow. Second operand 5 states and 102 transitions. [2024-11-20 09:45:14,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 394 transitions, 5047 flow [2024-11-20 09:45:15,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 394 transitions, 4855 flow, removed 39 selfloop flow, removed 15 redundant places. [2024-11-20 09:45:15,175 INFO L231 Difference]: Finished difference. Result has 172 places, 343 transitions, 4525 flow [2024-11-20 09:45:15,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2763, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4525, PETRI_PLACES=172, PETRI_TRANSITIONS=343} [2024-11-20 09:45:15,176 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-11-20 09:45:15,176 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 343 transitions, 4525 flow [2024-11-20 09:45:15,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:15,176 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:15,176 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:15,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 09:45:15,377 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,SelfDestructingSolverStorable13 [2024-11-20 09:45:15,377 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:15,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash 142617547, now seen corresponding path program 6 times [2024-11-20 09:45:15,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:15,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339446537] [2024-11-20 09:45:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:15,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 09:45:15,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:15,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339446537] [2024-11-20 09:45:15,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339446537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:15,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359354805] [2024-11-20 09:45:15,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:45:15,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:15,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:15,567 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) [2024-11-20 09:45:15,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 09:45:15,631 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-20 09:45:15,632 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:15,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:45:15,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 09:45:15,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 09:45:15,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359354805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:15,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:15,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-20 09:45:15,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976981326] [2024-11-20 09:45:15,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:15,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 09:45:15,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:15,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 09:45:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-11-20 09:45:15,811 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:45:15,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 343 transitions, 4525 flow. Second operand has 17 states, 17 states have (on average 11.176470588235293) internal successors, (190), 17 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:15,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:15,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:45:15,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:19,536 INFO L124 PetriNetUnfolderBase]: 14237/27490 cut-off events. [2024-11-20 09:45:19,537 INFO L125 PetriNetUnfolderBase]: For 113360/113360 co-relation queries the response was YES. [2024-11-20 09:45:19,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89968 conditions, 27490 events. 14237/27490 cut-off events. For 113360/113360 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 223695 event pairs, 7365 based on Foata normal form. 11/25670 useless extension candidates. Maximal degree in co-relation 89911. Up to 23692 conditions per place. [2024-11-20 09:45:19,771 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 318 selfloop transitions, 6 changer transitions 50/381 dead transitions. [2024-11-20 09:45:19,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 381 transitions, 5187 flow [2024-11-20 09:45:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:45:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:45:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-11-20 09:45:19,772 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-20 09:45:19,772 INFO L175 Difference]: Start difference. First operand has 172 places, 343 transitions, 4525 flow. Second operand 9 states and 144 transitions. [2024-11-20 09:45:19,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 381 transitions, 5187 flow [2024-11-20 09:45:20,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 381 transitions, 4911 flow, removed 111 selfloop flow, removed 3 redundant places. [2024-11-20 09:45:20,441 INFO L231 Difference]: Finished difference. Result has 177 places, 327 transitions, 4014 flow [2024-11-20 09:45:20,442 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4014, PETRI_PLACES=177, PETRI_TRANSITIONS=327} [2024-11-20 09:45:20,442 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-11-20 09:45:20,442 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 327 transitions, 4014 flow [2024-11-20 09:45:20,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.176470588235293) internal successors, (190), 17 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:20,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:20,443 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:20,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 09:45:20,643 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,SelfDestructingSolverStorable14 [2024-11-20 09:45:20,643 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:20,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:20,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1515771856, now seen corresponding path program 7 times [2024-11-20 09:45:20,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:20,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262537078] [2024-11-20 09:45:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:20,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 09:45:20,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:20,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262537078] [2024-11-20 09:45:20,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262537078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:20,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658310838] [2024-11-20 09:45:20,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:45:20,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:20,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:20,789 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) [2024-11-20 09:45:20,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 09:45:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:20,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:45:20,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 09:45:20,977 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 09:45:21,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658310838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:21,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:21,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-20 09:45:21,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529681659] [2024-11-20 09:45:21,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:21,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:45:21,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:21,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:45:21,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:45:21,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:45:21,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 327 transitions, 4014 flow. Second operand has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 21 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:21,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:21,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:45:21,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:22,395 INFO L124 PetriNetUnfolderBase]: 4680/8982 cut-off events. [2024-11-20 09:45:22,395 INFO L125 PetriNetUnfolderBase]: For 35248/35248 co-relation queries the response was YES. [2024-11-20 09:45:22,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29056 conditions, 8982 events. 4680/8982 cut-off events. For 35248/35248 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 62607 event pairs, 3754 based on Foata normal form. 55/8422 useless extension candidates. Maximal degree in co-relation 29000. Up to 7103 conditions per place. [2024-11-20 09:45:22,454 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 90 selfloop transitions, 4 changer transitions 60/161 dead transitions. [2024-11-20 09:45:22,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 161 transitions, 1837 flow [2024-11-20 09:45:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:45:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:45:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-11-20 09:45:22,455 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-11-20 09:45:22,455 INFO L175 Difference]: Start difference. First operand has 177 places, 327 transitions, 4014 flow. Second operand 10 states and 150 transitions. [2024-11-20 09:45:22,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 161 transitions, 1837 flow [2024-11-20 09:45:22,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 161 transitions, 1519 flow, removed 93 selfloop flow, removed 32 redundant places. [2024-11-20 09:45:22,592 INFO L231 Difference]: Finished difference. Result has 113 places, 101 transitions, 950 flow [2024-11-20 09:45:22,592 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=950, PETRI_PLACES=113, PETRI_TRANSITIONS=101} [2024-11-20 09:45:22,592 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 83 predicate places. [2024-11-20 09:45:22,592 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 101 transitions, 950 flow [2024-11-20 09:45:22,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 21 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:22,593 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:22,593 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:22,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-20 09:45:22,793 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,SelfDestructingSolverStorable15 [2024-11-20 09:45:22,793 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:22,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:22,794 INFO L85 PathProgramCache]: Analyzing trace with hash -49337493, now seen corresponding path program 8 times [2024-11-20 09:45:22,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:22,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089671378] [2024-11-20 09:45:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:22,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:23,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:23,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089671378] [2024-11-20 09:45:23,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089671378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:23,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247802389] [2024-11-20 09:45:23,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:45:23,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:23,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:23,695 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) [2024-11-20 09:45:23,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 09:45:23,758 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:45:23,758 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:23,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-20 09:45:23,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:24,420 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2024-11-20 09:45:24,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2024-11-20 09:45:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:24,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:24,849 INFO L349 Elim1Store]: treesize reduction 32, result has 70.6 percent of original size [2024-11-20 09:45:24,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 106 [2024-11-20 09:45:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:25,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247802389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:25,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:25,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2024-11-20 09:45:25,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350454090] [2024-11-20 09:45:25,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:25,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-20 09:45:25,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:25,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-20 09:45:25,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2024-11-20 09:45:25,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:45:25,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 101 transitions, 950 flow. Second operand has 39 states, 39 states have (on average 9.692307692307692) internal successors, (378), 39 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:25,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:25,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:45:25,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:36,715 INFO L124 PetriNetUnfolderBase]: 17022/32635 cut-off events. [2024-11-20 09:45:36,715 INFO L125 PetriNetUnfolderBase]: For 68630/68630 co-relation queries the response was YES. [2024-11-20 09:45:36,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92895 conditions, 32635 events. 17022/32635 cut-off events. For 68630/68630 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 279649 event pairs, 2770 based on Foata normal form. 136/30593 useless extension candidates. Maximal degree in co-relation 92864. Up to 5710 conditions per place. [2024-11-20 09:45:36,926 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 637 selfloop transitions, 353 changer transitions 307/1304 dead transitions. [2024-11-20 09:45:36,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1304 transitions, 10205 flow [2024-11-20 09:45:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-11-20 09:45:36,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2024-11-20 09:45:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 1715 transitions. [2024-11-20 09:45:36,931 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5641447368421053 [2024-11-20 09:45:36,931 INFO L175 Difference]: Start difference. First operand has 113 places, 101 transitions, 950 flow. Second operand 95 states and 1715 transitions. [2024-11-20 09:45:36,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1304 transitions, 10205 flow [2024-11-20 09:45:37,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 1304 transitions, 10107 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-11-20 09:45:37,019 INFO L231 Difference]: Finished difference. Result has 221 places, 441 transitions, 6017 flow [2024-11-20 09:45:37,020 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=6017, PETRI_PLACES=221, PETRI_TRANSITIONS=441} [2024-11-20 09:45:37,020 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-11-20 09:45:37,020 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 441 transitions, 6017 flow [2024-11-20 09:45:37,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 9.692307692307692) internal successors, (378), 39 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:37,021 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:37,021 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:37,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-20 09:45:37,221 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,SelfDestructingSolverStorable16 [2024-11-20 09:45:37,221 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:37,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:37,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1889069495, now seen corresponding path program 9 times [2024-11-20 09:45:37,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:37,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921054] [2024-11-20 09:45:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:37,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:38,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:38,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921054] [2024-11-20 09:45:38,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:38,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536458982] [2024-11-20 09:45:38,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:45:38,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:38,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:38,067 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) [2024-11-20 09:45:38,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 09:45:38,152 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-20 09:45:38,152 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:38,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-20 09:45:38,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:38,937 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:39,422 INFO L349 Elim1Store]: treesize reduction 41, result has 60.2 percent of original size [2024-11-20 09:45:39,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 91 [2024-11-20 09:45:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:39,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536458982] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:45:39,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:45:39,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2024-11-20 09:45:39,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567986843] [2024-11-20 09:45:39,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:45:39,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-20 09:45:39,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:45:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-20 09:45:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2024-11-20 09:45:39,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-11-20 09:45:39,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 441 transitions, 6017 flow. Second operand has 38 states, 38 states have (on average 9.763157894736842) internal successors, (371), 38 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:39,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:45:39,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-11-20 09:45:39,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:45:50,231 INFO L124 PetriNetUnfolderBase]: 18671/36400 cut-off events. [2024-11-20 09:45:50,232 INFO L125 PetriNetUnfolderBase]: For 362545/362545 co-relation queries the response was YES. [2024-11-20 09:45:50,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132084 conditions, 36400 events. 18671/36400 cut-off events. For 362545/362545 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 300345 event pairs, 2870 based on Foata normal form. 653/34565 useless extension candidates. Maximal degree in co-relation 132016. Up to 6205 conditions per place. [2024-11-20 09:45:50,638 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 353 selfloop transitions, 355 changer transitions 429/1144 dead transitions. [2024-11-20 09:45:50,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 1144 transitions, 13450 flow [2024-11-20 09:45:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-20 09:45:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-11-20 09:45:50,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 1128 transitions. [2024-11-20 09:45:50,641 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-11-20 09:45:50,641 INFO L175 Difference]: Start difference. First operand has 221 places, 441 transitions, 6017 flow. Second operand 63 states and 1128 transitions. [2024-11-20 09:45:50,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 1144 transitions, 13450 flow [2024-11-20 09:45:52,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1144 transitions, 10606 flow, removed 1405 selfloop flow, removed 16 redundant places. [2024-11-20 09:45:52,048 INFO L231 Difference]: Finished difference. Result has 285 places, 445 transitions, 6019 flow [2024-11-20 09:45:52,049 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=6019, PETRI_PLACES=285, PETRI_TRANSITIONS=445} [2024-11-20 09:45:52,049 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2024-11-20 09:45:52,049 INFO L471 AbstractCegarLoop]: Abstraction has has 285 places, 445 transitions, 6019 flow [2024-11-20 09:45:52,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.763157894736842) internal successors, (371), 38 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:45:52,049 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:45:52,049 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:45:52,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-20 09:45:52,250 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,SelfDestructingSolverStorable17 [2024-11-20 09:45:52,250 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:45:52,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:45:52,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1784054657, now seen corresponding path program 10 times [2024-11-20 09:45:52,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:45:52,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401893746] [2024-11-20 09:45:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:45:52,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:45:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:45:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:52,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:45:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401893746] [2024-11-20 09:45:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401893746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:45:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794633276] [2024-11-20 09:45:52,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:45:52,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:45:52,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:45:52,906 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) [2024-11-20 09:45:52,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 09:45:52,969 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:45:52,969 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:45:52,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-20 09:45:52,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:45:53,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 09:45:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 09:45:53,649 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 09:45:53,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:45:53,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2024-11-20 09:45:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:45:53,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:45:55,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 180 [2024-11-20 09:45:55,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:45:55,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 540 treesize of output 524