./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/test-context1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:55:16,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:55:16,951 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:55:16,955 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:55:16,955 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:55:16,979 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:55:16,980 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:55:16,980 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:55:16,981 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:55:16,981 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:55:16,981 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:55:16,982 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:55:16,982 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:55:16,982 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:55:16,983 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:55:16,983 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:55:16,983 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:55:16,983 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:55:16,983 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:55:16,984 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:55:16,984 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:55:16,984 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:55:16,985 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:55:16,985 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:55:16,985 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:55:16,985 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:55:16,986 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:55:16,986 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:55:16,986 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:55:16,987 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:55:16,987 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:55:16,987 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:55:16,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:55:16,988 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:55:16,988 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:55:16,988 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:55:16,989 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:55:16,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:55:16,989 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:55:16,990 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:55:16,990 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:55:16,991 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:55:16,991 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2024-11-19 01:55:17,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:55:17,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:55:17,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:55:17,196 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:55:17,196 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:55:17,197 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-context1.wvr.c [2024-11-19 01:55:18,601 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:55:18,770 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:55:18,771 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2024-11-19 01:55:18,779 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77a0fd1e4/41b8fb87c3b7417582fd933963d02a92/FLAG5b68848d6 [2024-11-19 01:55:18,794 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77a0fd1e4/41b8fb87c3b7417582fd933963d02a92 [2024-11-19 01:55:18,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:55:18,798 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:55:18,801 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:55:18,801 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:55:18,807 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:55:18,807 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:55:18" (1/1) ... [2024-11-19 01:55:18,808 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a3ad04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:18, skipping insertion in model container [2024-11-19 01:55:18,809 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:55:18" (1/1) ... [2024-11-19 01:55:18,837 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:55:18,989 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2024-11-19 01:55:18,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:55:19,011 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:55:19,029 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2024-11-19 01:55:19,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:55:19,049 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:55:19,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19 WrapperNode [2024-11-19 01:55:19,050 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:55:19,051 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:55:19,051 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:55:19,051 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:55:19,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (1/1) ... [2024-11-19 01:55:19,062 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (1/1) ... [2024-11-19 01:55:19,087 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 127 [2024-11-19 01:55:19,087 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:55:19,088 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:55:19,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:55:19,088 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:55:19,109 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (1/1) ... [2024-11-19 01:55:19,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (1/1) ... [2024-11-19 01:55:19,113 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (1/1) ... [2024-11-19 01:55:19,136 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 01:55:19,137 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (1/1) ... [2024-11-19 01:55:19,138 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (1/1) ... [2024-11-19 01:55:19,147 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (1/1) ... [2024-11-19 01:55:19,150 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (1/1) ... [2024-11-19 01:55:19,152 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (1/1) ... [2024-11-19 01:55:19,153 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (1/1) ... [2024-11-19 01:55:19,159 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:55:19,159 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:55:19,160 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:55:19,160 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:55:19,160 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (1/1) ... [2024-11-19 01:55:19,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:55:19,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:19,202 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) [2024-11-19 01:55:19,204 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 [2024-11-19 01:55:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:55:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 01:55:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 01:55:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 01:55:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 01:55:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:55:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 01:55:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 01:55:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 01:55:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 01:55:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 01:55:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 01:55:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:55:19,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:55:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 01:55:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 01:55:19,244 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:55:19,321 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:55:19,323 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:55:19,475 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:55:19,475 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:55:19,625 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:55:19,625 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 01:55:19,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:55:19 BoogieIcfgContainer [2024-11-19 01:55:19,626 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:55:19,630 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:55:19,630 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:55:19,633 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:55:19,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:55:18" (1/3) ... [2024-11-19 01:55:19,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e189f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:55:19, skipping insertion in model container [2024-11-19 01:55:19,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:19" (2/3) ... [2024-11-19 01:55:19,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e189f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:55:19, skipping insertion in model container [2024-11-19 01:55:19,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:55:19" (3/3) ... [2024-11-19 01:55:19,637 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2024-11-19 01:55:19,654 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:55:19,655 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:55:19,655 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:55:19,706 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 01:55:19,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 70 flow [2024-11-19 01:55:19,833 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2024-11-19 01:55:19,833 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:55:19,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 5/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-11-19 01:55:19,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 70 flow [2024-11-19 01:55:19,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 62 flow [2024-11-19 01:55:19,855 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:55:19,864 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;@7a265d04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:55:19,864 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:55:19,876 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:55:19,876 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2024-11-19 01:55:19,876 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:55:19,876 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:19,877 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:19,878 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:19,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:19,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1826755679, now seen corresponding path program 1 times [2024-11-19 01:55:19,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:19,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537030864] [2024-11-19 01:55:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:55:19,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:20,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:20,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537030864] [2024-11-19 01:55:20,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537030864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:55:20,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:55:20,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 01:55:20,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749812638] [2024-11-19 01:55:20,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:20,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 01:55:20,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 01:55:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 01:55:20,113 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:20,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:20,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:20,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:20,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:20,186 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2024-11-19 01:55:20,186 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-19 01:55:20,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 217 events. 122/217 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 721 event pairs, 94 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 405. Up to 214 conditions per place. [2024-11-19 01:55:20,190 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-11-19 01:55:20,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 98 flow [2024-11-19 01:55:20,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 01:55:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-19 01:55:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2024-11-19 01:55:20,207 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-19 01:55:20,209 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 2 states and 32 transitions. [2024-11-19 01:55:20,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 98 flow [2024-11-19 01:55:20,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 01:55:20,213 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2024-11-19 01:55:20,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-11-19 01:55:20,220 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-11-19 01:55:20,221 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2024-11-19 01:55:20,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:20,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:20,221 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:20,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:55:20,222 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:20,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:20,223 INFO L85 PathProgramCache]: Analyzing trace with hash 5065408, now seen corresponding path program 1 times [2024-11-19 01:55:20,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:20,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631304735] [2024-11-19 01:55:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:55:20,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:20,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:20,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631304735] [2024-11-19 01:55:20,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631304735] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:55:20,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:55:20,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 01:55:20,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620580375] [2024-11-19 01:55:20,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:20,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:55:20,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:55:20,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:55:20,302 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:20,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:20,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:20,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:20,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:20,386 INFO L124 PetriNetUnfolderBase]: 203/353 cut-off events. [2024-11-19 01:55:20,386 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 01:55:20,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 353 events. 203/353 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1268 event pairs, 82 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 709. Up to 176 conditions per place. [2024-11-19 01:55:20,389 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 28 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2024-11-19 01:55:20,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 144 flow [2024-11-19 01:55:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:55:20,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:55:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-11-19 01:55:20,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-19 01:55:20,390 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 49 transitions. [2024-11-19 01:55:20,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 144 flow [2024-11-19 01:55:20,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 01:55:20,392 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2024-11-19 01:55:20,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-11-19 01:55:20,393 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-11-19 01:55:20,393 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2024-11-19 01:55:20,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:20,393 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:20,394 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] [2024-11-19 01:55:20,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:55:20,394 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:20,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:20,395 INFO L85 PathProgramCache]: Analyzing trace with hash -576454128, now seen corresponding path program 1 times [2024-11-19 01:55:20,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:20,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692377957] [2024-11-19 01:55:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:55:20,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:20,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:20,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692377957] [2024-11-19 01:55:20,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692377957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:55:20,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:55:20,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 01:55:20,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639377858] [2024-11-19 01:55:20,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:20,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:55:20,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:20,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:55:20,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:55:20,478 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:20,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:20,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:20,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:20,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:20,561 INFO L124 PetriNetUnfolderBase]: 251/446 cut-off events. [2024-11-19 01:55:20,562 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-19 01:55:20,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 446 events. 251/446 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1647 event pairs, 113 based on Foata normal form. 11/386 useless extension candidates. Maximal degree in co-relation 934. Up to 306 conditions per place. [2024-11-19 01:55:20,567 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2024-11-19 01:55:20,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 163 flow [2024-11-19 01:55:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:55:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:55:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-11-19 01:55:20,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-11-19 01:55:20,570 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 3 states and 50 transitions. [2024-11-19 01:55:20,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 163 flow [2024-11-19 01:55:20,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:55:20,572 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2024-11-19 01:55:20,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-11-19 01:55:20,573 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-11-19 01:55:20,574 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2024-11-19 01:55:20,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:20,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:20,575 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:20,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 01:55:20,575 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:20,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:20,576 INFO L85 PathProgramCache]: Analyzing trace with hash -685549057, now seen corresponding path program 1 times [2024-11-19 01:55:20,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:20,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947809491] [2024-11-19 01:55:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:55:20,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:20,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:20,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947809491] [2024-11-19 01:55:20,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947809491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:55:20,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:55:20,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:55:20,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253420210] [2024-11-19 01:55:20,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:20,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:55:20,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:20,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:55:20,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:55:20,812 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:20,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:20,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:20,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:20,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:20,885 INFO L124 PetriNetUnfolderBase]: 319/585 cut-off events. [2024-11-19 01:55:20,886 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-19 01:55:20,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 585 events. 319/585 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2472 event pairs, 285 based on Foata normal form. 12/502 useless extension candidates. Maximal degree in co-relation 1262. Up to 443 conditions per place. [2024-11-19 01:55:20,888 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2024-11-19 01:55:20,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 184 flow [2024-11-19 01:55:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:55:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:55:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2024-11-19 01:55:20,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-11-19 01:55:20,889 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 57 transitions. [2024-11-19 01:55:20,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 184 flow [2024-11-19 01:55:20,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:55:20,891 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 84 flow [2024-11-19 01:55:20,891 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-11-19 01:55:20,895 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-11-19 01:55:20,895 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 84 flow [2024-11-19 01:55:20,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:20,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:20,895 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:20,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 01:55:20,896 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:20,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1526105098, now seen corresponding path program 1 times [2024-11-19 01:55:20,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:20,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662953832] [2024-11-19 01:55:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:55:20,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:21,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:21,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662953832] [2024-11-19 01:55:21,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662953832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:21,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301362901] [2024-11-19 01:55:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:55:21,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:21,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:21,195 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) [2024-11-19 01:55:21,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:55:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:21,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:55:21,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:21,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:21,423 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 01:55:21,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 01:55:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:21,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301362901] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:21,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:21,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-19 01:55:21,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637812149] [2024-11-19 01:55:21,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:21,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:55:21,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:55:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:55:21,451 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:21,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 84 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:21,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:21,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:21,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:21,609 INFO L124 PetriNetUnfolderBase]: 331/583 cut-off events. [2024-11-19 01:55:21,610 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-19 01:55:21,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 583 events. 331/583 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2148 event pairs, 68 based on Foata normal form. 1/492 useless extension candidates. Maximal degree in co-relation 1281. Up to 157 conditions per place. [2024-11-19 01:55:21,612 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 44 selfloop transitions, 5 changer transitions 12/64 dead transitions. [2024-11-19 01:55:21,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 64 transitions, 295 flow [2024-11-19 01:55:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:55:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:55:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-11-19 01:55:21,614 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-19 01:55:21,614 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 84 flow. Second operand 6 states and 91 transitions. [2024-11-19 01:55:21,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 64 transitions, 295 flow [2024-11-19 01:55:21,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 64 transitions, 289 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-19 01:55:21,616 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 98 flow [2024-11-19 01:55:21,616 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2024-11-19 01:55:21,616 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2024-11-19 01:55:21,617 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 98 flow [2024-11-19 01:55:21,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:21,617 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:21,617 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:21,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 01:55:21,821 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 [2024-11-19 01:55:21,822 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:21,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:21,823 INFO L85 PathProgramCache]: Analyzing trace with hash -921432716, now seen corresponding path program 2 times [2024-11-19 01:55:21,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:21,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653119078] [2024-11-19 01:55:21,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:55:21,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:21,838 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:55:21,839 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:55:21,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:21,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653119078] [2024-11-19 01:55:21,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653119078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:21,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69708372] [2024-11-19 01:55:21,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:55:21,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:21,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:21,976 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) [2024-11-19 01:55:21,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:55:22,047 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:55:22,048 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:22,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:55:22,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:55:22,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:55:22,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69708372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:22,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:22,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-19 01:55:22,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976412174] [2024-11-19 01:55:22,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:22,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 01:55:22,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:22,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 01:55:22,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:55:22,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:22,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 98 flow. Second operand has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:22,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:22,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:22,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:22,563 INFO L124 PetriNetUnfolderBase]: 570/1015 cut-off events. [2024-11-19 01:55:22,563 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-11-19 01:55:22,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 1015 events. 570/1015 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4589 event pairs, 434 based on Foata normal form. 11/868 useless extension candidates. Maximal degree in co-relation 2280. Up to 579 conditions per place. [2024-11-19 01:55:22,567 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 22 selfloop transitions, 3 changer transitions 30/58 dead transitions. [2024-11-19 01:55:22,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 297 flow [2024-11-19 01:55:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:55:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:55:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-11-19 01:55:22,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-11-19 01:55:22,568 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 98 flow. Second operand 6 states and 82 transitions. [2024-11-19 01:55:22,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 297 flow [2024-11-19 01:55:22,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 58 transitions, 284 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-19 01:55:22,570 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 108 flow [2024-11-19 01:55:22,571 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2024-11-19 01:55:22,571 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 13 predicate places. [2024-11-19 01:55:22,571 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 108 flow [2024-11-19 01:55:22,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:22,572 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:22,572 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:22,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 01:55:22,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-19 01:55:22,777 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:22,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:22,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2021256789, now seen corresponding path program 3 times [2024-11-19 01:55:22,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:22,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187368468] [2024-11-19 01:55:22,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:55:22,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:22,802 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:55:22,802 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:55:22,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:22,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187368468] [2024-11-19 01:55:22,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187368468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:22,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286281129] [2024-11-19 01:55:22,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:55:22,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:22,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:22,843 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) [2024-11-19 01:55:22,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:55:22,912 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:55:22,912 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:22,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 01:55:22,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 01:55:22,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 01:55:22,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286281129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:22,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:22,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2024-11-19 01:55:22,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128106451] [2024-11-19 01:55:22,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:22,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:55:22,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:55:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:55:22,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:22,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:22,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:22,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:22,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:23,062 INFO L124 PetriNetUnfolderBase]: 719/1266 cut-off events. [2024-11-19 01:55:23,062 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-11-19 01:55:23,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2854 conditions, 1266 events. 719/1266 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5527 event pairs, 280 based on Foata normal form. 22/1089 useless extension candidates. Maximal degree in co-relation 2843. Up to 462 conditions per place. [2024-11-19 01:55:23,066 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 51 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-11-19 01:55:23,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 324 flow [2024-11-19 01:55:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:55:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:55:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-11-19 01:55:23,067 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-19 01:55:23,067 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 108 flow. Second operand 4 states and 72 transitions. [2024-11-19 01:55:23,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 324 flow [2024-11-19 01:55:23,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 61 transitions, 308 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-19 01:55:23,069 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 160 flow [2024-11-19 01:55:23,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-11-19 01:55:23,070 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2024-11-19 01:55:23,070 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 160 flow [2024-11-19 01:55:23,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:23,070 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:23,070 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:23,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 01:55:23,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:23,271 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:23,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:23,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1584792024, now seen corresponding path program 4 times [2024-11-19 01:55:23,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:23,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862546094] [2024-11-19 01:55:23,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:55:23,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:23,288 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:55:23,288 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 01:55:23,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:23,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862546094] [2024-11-19 01:55:23,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862546094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:23,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786680224] [2024-11-19 01:55:23,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:55:23,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:23,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:23,370 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) [2024-11-19 01:55:23,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 01:55:23,432 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:55:23,432 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:23,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 01:55:23,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:55:23,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:23,549 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 01:55:23,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 01:55:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:55:23,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786680224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:23,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:23,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-11-19 01:55:23,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075878896] [2024-11-19 01:55:23,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:23,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:55:23,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:55:23,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:55:23,607 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:23,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 160 flow. Second operand has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:23,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:23,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:23,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:23,920 INFO L124 PetriNetUnfolderBase]: 959/1670 cut-off events. [2024-11-19 01:55:23,920 INFO L125 PetriNetUnfolderBase]: For 1035/1035 co-relation queries the response was YES. [2024-11-19 01:55:23,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4075 conditions, 1670 events. 959/1670 cut-off events. For 1035/1035 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7476 event pairs, 140 based on Foata normal form. 4/1412 useless extension candidates. Maximal degree in co-relation 4064. Up to 300 conditions per place. [2024-11-19 01:55:23,926 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 82 selfloop transitions, 15 changer transitions 45/145 dead transitions. [2024-11-19 01:55:23,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 145 transitions, 738 flow [2024-11-19 01:55:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:55:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:55:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-11-19 01:55:23,927 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6396103896103896 [2024-11-19 01:55:23,927 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 160 flow. Second operand 11 states and 197 transitions. [2024-11-19 01:55:23,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 145 transitions, 738 flow [2024-11-19 01:55:23,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 145 transitions, 730 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-19 01:55:23,930 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 257 flow [2024-11-19 01:55:23,930 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=257, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2024-11-19 01:55:23,931 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2024-11-19 01:55:23,931 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 257 flow [2024-11-19 01:55:23,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:23,931 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:23,931 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:23,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 01:55:24,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:24,132 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:24,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:24,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1078660162, now seen corresponding path program 5 times [2024-11-19 01:55:24,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:24,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369492773] [2024-11-19 01:55:24,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:55:24,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:24,150 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:55:24,150 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:24,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:24,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369492773] [2024-11-19 01:55:24,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369492773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:24,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168718428] [2024-11-19 01:55:24,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:55:24,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:24,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:24,598 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) [2024-11-19 01:55:24,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 01:55:24,663 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:55:24,663 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:24,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 01:55:24,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:55:24,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:24,899 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 01:55:24,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-19 01:55:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:55:24,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168718428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:24,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:24,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 16 [2024-11-19 01:55:24,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50299822] [2024-11-19 01:55:24,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:24,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:55:24,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:24,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:55:24,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:55:24,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:24,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 257 flow. Second operand has 17 states, 17 states have (on average 9.235294117647058) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:24,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:24,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:24,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:25,511 INFO L124 PetriNetUnfolderBase]: 1039/1806 cut-off events. [2024-11-19 01:55:25,511 INFO L125 PetriNetUnfolderBase]: For 2026/2026 co-relation queries the response was YES. [2024-11-19 01:55:25,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4627 conditions, 1806 events. 1039/1806 cut-off events. For 2026/2026 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8259 event pairs, 68 based on Foata normal form. 1/1524 useless extension candidates. Maximal degree in co-relation 4611. Up to 325 conditions per place. [2024-11-19 01:55:25,518 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 106 selfloop transitions, 19 changer transitions 54/182 dead transitions. [2024-11-19 01:55:25,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 182 transitions, 961 flow [2024-11-19 01:55:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 01:55:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 01:55:25,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 265 transitions. [2024-11-19 01:55:25,519 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5567226890756303 [2024-11-19 01:55:25,519 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 257 flow. Second operand 17 states and 265 transitions. [2024-11-19 01:55:25,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 182 transitions, 961 flow [2024-11-19 01:55:25,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 182 transitions, 889 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-19 01:55:25,526 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 242 flow [2024-11-19 01:55:25,526 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=242, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2024-11-19 01:55:25,527 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 38 predicate places. [2024-11-19 01:55:25,527 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 242 flow [2024-11-19 01:55:25,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.235294117647058) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:25,527 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:25,527 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:25,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 01:55:25,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:25,728 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:25,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:25,728 INFO L85 PathProgramCache]: Analyzing trace with hash 427032896, now seen corresponding path program 6 times [2024-11-19 01:55:25,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:25,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839113021] [2024-11-19 01:55:25,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:55:25,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:25,766 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:55:25,766 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:55:25,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:25,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839113021] [2024-11-19 01:55:25,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839113021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:25,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225392337] [2024-11-19 01:55:25,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:55:25,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:25,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:25,859 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) [2024-11-19 01:55:25,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 01:55:25,928 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:55:25,928 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:25,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:55:25,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 01:55:26,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 01:55:26,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225392337] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:26,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:26,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2024-11-19 01:55:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274298319] [2024-11-19 01:55:26,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:26,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 01:55:26,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:26,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 01:55:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-11-19 01:55:26,260 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:26,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 242 flow. Second operand has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:26,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:26,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:26,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:26,895 INFO L124 PetriNetUnfolderBase]: 2813/4919 cut-off events. [2024-11-19 01:55:26,895 INFO L125 PetriNetUnfolderBase]: For 3920/3920 co-relation queries the response was YES. [2024-11-19 01:55:26,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11913 conditions, 4919 events. 2813/4919 cut-off events. For 3920/3920 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 27798 event pairs, 632 based on Foata normal form. 74/4220 useless extension candidates. Maximal degree in co-relation 11897. Up to 1046 conditions per place. [2024-11-19 01:55:26,912 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 67 selfloop transitions, 27 changer transitions 85/182 dead transitions. [2024-11-19 01:55:26,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 182 transitions, 1138 flow [2024-11-19 01:55:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:55:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:55:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 225 transitions. [2024-11-19 01:55:26,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5739795918367347 [2024-11-19 01:55:26,914 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 242 flow. Second operand 14 states and 225 transitions. [2024-11-19 01:55:26,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 182 transitions, 1138 flow [2024-11-19 01:55:26,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 182 transitions, 1026 flow, removed 14 selfloop flow, removed 14 redundant places. [2024-11-19 01:55:26,924 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 387 flow [2024-11-19 01:55:26,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=387, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-11-19 01:55:26,926 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 41 predicate places. [2024-11-19 01:55:26,926 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 387 flow [2024-11-19 01:55:26,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:26,926 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:26,926 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:26,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 01:55:27,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:27,131 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:27,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash -571173298, now seen corresponding path program 7 times [2024-11-19 01:55:27,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:27,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912033614] [2024-11-19 01:55:27,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:55:27,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:27,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:27,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912033614] [2024-11-19 01:55:27,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912033614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:27,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942018065] [2024-11-19 01:55:27,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:55:27,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:27,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:27,627 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) [2024-11-19 01:55:27,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 01:55:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:27,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-19 01:55:27,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:27,918 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:27,962 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 01:55:27,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 01:55:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 01:55:28,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942018065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:28,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:28,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 6] total 24 [2024-11-19 01:55:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800947098] [2024-11-19 01:55:28,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:28,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 01:55:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 01:55:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-11-19 01:55:28,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:28,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 387 flow. Second operand has 25 states, 25 states have (on average 8.36) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:28,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:28,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:28,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:29,955 INFO L124 PetriNetUnfolderBase]: 4103/7085 cut-off events. [2024-11-19 01:55:29,955 INFO L125 PetriNetUnfolderBase]: For 7012/7012 co-relation queries the response was YES. [2024-11-19 01:55:29,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18074 conditions, 7085 events. 4103/7085 cut-off events. For 7012/7012 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 40655 event pairs, 320 based on Foata normal form. 12/5994 useless extension candidates. Maximal degree in co-relation 18054. Up to 1300 conditions per place. [2024-11-19 01:55:29,999 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 281 selfloop transitions, 74 changer transitions 90/448 dead transitions. [2024-11-19 01:55:30,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 448 transitions, 2622 flow [2024-11-19 01:55:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-19 01:55:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-19 01:55:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 615 transitions. [2024-11-19 01:55:30,004 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-11-19 01:55:30,004 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 387 flow. Second operand 36 states and 615 transitions. [2024-11-19 01:55:30,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 448 transitions, 2622 flow [2024-11-19 01:55:30,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 448 transitions, 2542 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-11-19 01:55:30,023 INFO L231 Difference]: Finished difference. Result has 105 places, 96 transitions, 973 flow [2024-11-19 01:55:30,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=973, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2024-11-19 01:55:30,024 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2024-11-19 01:55:30,024 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 973 flow [2024-11-19 01:55:30,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.36) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:30,024 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:30,025 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:30,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 01:55:30,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:30,226 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:30,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash 327978890, now seen corresponding path program 8 times [2024-11-19 01:55:30,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:30,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454486210] [2024-11-19 01:55:30,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:55:30,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:30,251 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:55:30,251 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:30,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:30,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454486210] [2024-11-19 01:55:30,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454486210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:30,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112539829] [2024-11-19 01:55:30,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:55:30,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:30,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:30,609 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) [2024-11-19 01:55:30,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 01:55:30,686 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:55:30,686 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:30,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-19 01:55:30,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 01:55:31,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:31,146 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 01:55:31,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-19 01:55:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 01:55:31,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112539829] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:31,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:31,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 25 [2024-11-19 01:55:31,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572130840] [2024-11-19 01:55:31,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:31,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 01:55:31,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:31,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 01:55:31,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2024-11-19 01:55:31,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:31,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 973 flow. Second operand has 26 states, 26 states have (on average 8.615384615384615) internal successors, (224), 26 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:31,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:31,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:31,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:33,241 INFO L124 PetriNetUnfolderBase]: 5493/9452 cut-off events. [2024-11-19 01:55:33,241 INFO L125 PetriNetUnfolderBase]: For 15522/15522 co-relation queries the response was YES. [2024-11-19 01:55:33,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24861 conditions, 9452 events. 5493/9452 cut-off events. For 15522/15522 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 57508 event pairs, 532 based on Foata normal form. 15/7999 useless extension candidates. Maximal degree in co-relation 24830. Up to 1855 conditions per place. [2024-11-19 01:55:33,293 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 139 selfloop transitions, 91 changer transitions 130/363 dead transitions. [2024-11-19 01:55:33,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 363 transitions, 2520 flow [2024-11-19 01:55:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-19 01:55:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-19 01:55:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 440 transitions. [2024-11-19 01:55:33,296 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-11-19 01:55:33,296 INFO L175 Difference]: Start difference. First operand has 105 places, 96 transitions, 973 flow. Second operand 27 states and 440 transitions. [2024-11-19 01:55:33,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 363 transitions, 2520 flow [2024-11-19 01:55:33,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 363 transitions, 2170 flow, removed 86 selfloop flow, removed 12 redundant places. [2024-11-19 01:55:33,360 INFO L231 Difference]: Finished difference. Result has 128 places, 112 transitions, 1166 flow [2024-11-19 01:55:33,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1166, PETRI_PLACES=128, PETRI_TRANSITIONS=112} [2024-11-19 01:55:33,361 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 101 predicate places. [2024-11-19 01:55:33,361 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 112 transitions, 1166 flow [2024-11-19 01:55:33,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.615384615384615) internal successors, (224), 26 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:33,362 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:33,362 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:33,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 01:55:33,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 01:55:33,567 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:33,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1189374657, now seen corresponding path program 9 times [2024-11-19 01:55:33,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:33,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364606024] [2024-11-19 01:55:33,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:55:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:33,641 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:55:33,641 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 01:55:33,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:33,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364606024] [2024-11-19 01:55:33,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364606024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:33,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382750615] [2024-11-19 01:55:33,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:55:33,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:33,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:33,788 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) [2024-11-19 01:55:33,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 01:55:33,995 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:55:33,995 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:33,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:55:34,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 01:55:34,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 01:55:34,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382750615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:34,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:34,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2024-11-19 01:55:34,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627275262] [2024-11-19 01:55:34,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:34,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:55:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:34,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:55:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:55:34,124 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:34,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 112 transitions, 1166 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:34,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:34,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:34,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:35,633 INFO L124 PetriNetUnfolderBase]: 8419/14458 cut-off events. [2024-11-19 01:55:35,634 INFO L125 PetriNetUnfolderBase]: For 22064/22064 co-relation queries the response was YES. [2024-11-19 01:55:35,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38096 conditions, 14458 events. 8419/14458 cut-off events. For 22064/22064 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 95631 event pairs, 1700 based on Foata normal form. 22/12232 useless extension candidates. Maximal degree in co-relation 38058. Up to 3528 conditions per place. [2024-11-19 01:55:35,691 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 103 selfloop transitions, 105 changer transitions 0/211 dead transitions. [2024-11-19 01:55:35,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 211 transitions, 2482 flow [2024-11-19 01:55:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:55:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:55:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-11-19 01:55:35,696 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-19 01:55:35,696 INFO L175 Difference]: Start difference. First operand has 128 places, 112 transitions, 1166 flow. Second operand 6 states and 114 transitions. [2024-11-19 01:55:35,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 211 transitions, 2482 flow [2024-11-19 01:55:35,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 211 transitions, 2062 flow, removed 115 selfloop flow, removed 22 redundant places. [2024-11-19 01:55:35,762 INFO L231 Difference]: Finished difference. Result has 108 places, 155 transitions, 1704 flow [2024-11-19 01:55:35,764 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1704, PETRI_PLACES=108, PETRI_TRANSITIONS=155} [2024-11-19 01:55:35,764 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 81 predicate places. [2024-11-19 01:55:35,764 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 155 transitions, 1704 flow [2024-11-19 01:55:35,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:35,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:35,765 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:35,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 01:55:35,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 01:55:35,966 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:35,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:35,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1980071336, now seen corresponding path program 10 times [2024-11-19 01:55:35,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:35,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953336301] [2024-11-19 01:55:35,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:55:35,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:36,004 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:55:36,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 01:55:36,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:36,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953336301] [2024-11-19 01:55:36,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953336301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:36,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335137970] [2024-11-19 01:55:36,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:55:36,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:36,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:36,456 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) [2024-11-19 01:55:36,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 01:55:36,540 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:55:36,540 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:36,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-19 01:55:36,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:36,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:37,014 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 01:55:37,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 01:55:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 01:55:37,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335137970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:37,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:37,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 10] total 26 [2024-11-19 01:55:37,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650354824] [2024-11-19 01:55:37,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:37,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 01:55:37,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:37,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 01:55:37,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-11-19 01:55:37,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:37,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 155 transitions, 1704 flow. Second operand has 27 states, 27 states have (on average 8.666666666666666) internal successors, (234), 27 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:37,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:37,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:37,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:40,148 INFO L124 PetriNetUnfolderBase]: 10157/17436 cut-off events. [2024-11-19 01:55:40,149 INFO L125 PetriNetUnfolderBase]: For 26671/26671 co-relation queries the response was YES. [2024-11-19 01:55:40,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46969 conditions, 17436 events. 10157/17436 cut-off events. For 26671/26671 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 117560 event pairs, 877 based on Foata normal form. 9/14735 useless extension candidates. Maximal degree in co-relation 46940. Up to 3200 conditions per place. [2024-11-19 01:55:40,216 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 265 selfloop transitions, 162 changer transitions 90/520 dead transitions. [2024-11-19 01:55:40,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 520 transitions, 4093 flow [2024-11-19 01:55:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-19 01:55:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-19 01:55:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 578 transitions. [2024-11-19 01:55:40,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-19 01:55:40,219 INFO L175 Difference]: Start difference. First operand has 108 places, 155 transitions, 1704 flow. Second operand 34 states and 578 transitions. [2024-11-19 01:55:40,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 520 transitions, 4093 flow [2024-11-19 01:55:40,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 520 transitions, 3991 flow, removed 51 selfloop flow, removed 0 redundant places. [2024-11-19 01:55:40,289 INFO L231 Difference]: Finished difference. Result has 150 places, 192 transitions, 2482 flow [2024-11-19 01:55:40,289 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2482, PETRI_PLACES=150, PETRI_TRANSITIONS=192} [2024-11-19 01:55:40,289 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 123 predicate places. [2024-11-19 01:55:40,290 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 192 transitions, 2482 flow [2024-11-19 01:55:40,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 8.666666666666666) internal successors, (234), 27 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:40,291 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:40,291 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:40,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 01:55:40,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 01:55:40,492 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:40,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:40,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2127821118, now seen corresponding path program 11 times [2024-11-19 01:55:40,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:40,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180189536] [2024-11-19 01:55:40,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:55:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:40,517 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-19 01:55:40,517 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:41,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:41,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180189536] [2024-11-19 01:55:41,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180189536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:41,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101535035] [2024-11-19 01:55:41,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:55:41,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:41,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:41,029 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) [2024-11-19 01:55:41,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 01:55:41,130 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-19 01:55:41,130 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:41,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 01:55:41,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:41,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:41,534 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 01:55:41,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-19 01:55:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 01:55:41,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101535035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:41,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:41,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 30 [2024-11-19 01:55:41,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153369075] [2024-11-19 01:55:41,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:41,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-19 01:55:41,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:41,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-19 01:55:41,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2024-11-19 01:55:41,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:41,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 192 transitions, 2482 flow. Second operand has 31 states, 31 states have (on average 8.451612903225806) internal successors, (262), 31 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:41,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:41,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:41,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:45,697 INFO L124 PetriNetUnfolderBase]: 12957/22204 cut-off events. [2024-11-19 01:55:45,698 INFO L125 PetriNetUnfolderBase]: For 46884/46884 co-relation queries the response was YES. [2024-11-19 01:55:45,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62047 conditions, 22204 events. 12957/22204 cut-off events. For 46884/46884 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 156406 event pairs, 716 based on Foata normal form. 1/18760 useless extension candidates. Maximal degree in co-relation 62008. Up to 4075 conditions per place. [2024-11-19 01:55:45,845 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 309 selfloop transitions, 218 changer transitions 93/623 dead transitions. [2024-11-19 01:55:45,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 623 transitions, 5618 flow [2024-11-19 01:55:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-19 01:55:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-19 01:55:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 645 transitions. [2024-11-19 01:55:45,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.606203007518797 [2024-11-19 01:55:45,847 INFO L175 Difference]: Start difference. First operand has 150 places, 192 transitions, 2482 flow. Second operand 38 states and 645 transitions. [2024-11-19 01:55:45,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 623 transitions, 5618 flow [2024-11-19 01:55:46,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 623 transitions, 5197 flow, removed 47 selfloop flow, removed 11 redundant places. [2024-11-19 01:55:46,173 INFO L231 Difference]: Finished difference. Result has 177 places, 240 transitions, 3109 flow [2024-11-19 01:55:46,174 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3109, PETRI_PLACES=177, PETRI_TRANSITIONS=240} [2024-11-19 01:55:46,174 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 150 predicate places. [2024-11-19 01:55:46,174 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 240 transitions, 3109 flow [2024-11-19 01:55:46,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.451612903225806) internal successors, (262), 31 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:46,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:46,175 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:46,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 01:55:46,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 01:55:46,376 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:46,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash -748279792, now seen corresponding path program 12 times [2024-11-19 01:55:46,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:46,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111038018] [2024-11-19 01:55:46,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:55:46,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:46,400 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-19 01:55:46,401 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:47,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:47,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111038018] [2024-11-19 01:55:47,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111038018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:47,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825255019] [2024-11-19 01:55:47,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:55:47,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:47,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:47,062 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) [2024-11-19 01:55:47,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 01:55:47,216 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-19 01:55:47,216 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:47,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-19 01:55:47,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:55:47,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:47,441 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 01:55:47,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-19 01:55:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 01:55:47,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825255019] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:47,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:47,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 8] total 24 [2024-11-19 01:55:47,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881874808] [2024-11-19 01:55:47,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:47,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 01:55:47,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:47,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 01:55:47,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2024-11-19 01:55:47,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:47,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 240 transitions, 3109 flow. Second operand has 25 states, 25 states have (on average 8.28) internal successors, (207), 25 states have internal predecessors, (207), 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) [2024-11-19 01:55:47,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:47,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:47,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:56,648 INFO L124 PetriNetUnfolderBase]: 26970/46440 cut-off events. [2024-11-19 01:55:56,648 INFO L125 PetriNetUnfolderBase]: For 104777/104777 co-relation queries the response was YES. [2024-11-19 01:55:56,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128513 conditions, 46440 events. 26970/46440 cut-off events. For 104777/104777 co-relation queries the response was YES. Maximal size of possible extension queue 1047. Compared 369276 event pairs, 2579 based on Foata normal form. 348/39535 useless extension candidates. Maximal degree in co-relation 128472. Up to 8600 conditions per place. [2024-11-19 01:55:56,877 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 470 selfloop transitions, 351 changer transitions 536/1360 dead transitions. [2024-11-19 01:55:56,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 1360 transitions, 11903 flow [2024-11-19 01:55:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-11-19 01:55:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2024-11-19 01:55:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 1427 transitions. [2024-11-19 01:55:56,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6370535714285714 [2024-11-19 01:55:56,880 INFO L175 Difference]: Start difference. First operand has 177 places, 240 transitions, 3109 flow. Second operand 80 states and 1427 transitions. [2024-11-19 01:55:56,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 1360 transitions, 11903 flow [2024-11-19 01:55:57,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 1360 transitions, 11606 flow, removed 37 selfloop flow, removed 14 redundant places. [2024-11-19 01:55:57,386 INFO L231 Difference]: Finished difference. Result has 266 places, 386 transitions, 5917 flow [2024-11-19 01:55:57,386 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=5917, PETRI_PLACES=266, PETRI_TRANSITIONS=386} [2024-11-19 01:55:57,386 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 239 predicate places. [2024-11-19 01:55:57,386 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 386 transitions, 5917 flow [2024-11-19 01:55:57,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.28) internal successors, (207), 25 states have internal predecessors, (207), 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) [2024-11-19 01:55:57,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:57,387 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:57,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 01:55:57,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 01:55:57,587 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:57,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:57,589 INFO L85 PathProgramCache]: Analyzing trace with hash 124905382, now seen corresponding path program 13 times [2024-11-19 01:55:57,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:57,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101939942] [2024-11-19 01:55:57,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:55:57,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:57,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:57,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101939942] [2024-11-19 01:55:57,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101939942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:57,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636966581] [2024-11-19 01:55:57,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:55:57,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:57,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:57,961 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) [2024-11-19 01:55:57,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 01:55:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:58,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-19 01:55:58,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 01:55:58,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:58,313 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 01:55:58,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-19 01:55:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 01:55:58,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636966581] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:58,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:58,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 30 [2024-11-19 01:55:58,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628689722] [2024-11-19 01:55:58,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:58,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-19 01:55:58,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:58,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-19 01:55:58,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2024-11-19 01:55:58,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:55:58,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 386 transitions, 5917 flow. Second operand has 31 states, 31 states have (on average 8.64516129032258) internal successors, (268), 31 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:58,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:58,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:55:58,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:07,333 INFO L124 PetriNetUnfolderBase]: 26120/44650 cut-off events. [2024-11-19 01:56:07,333 INFO L125 PetriNetUnfolderBase]: For 172578/172578 co-relation queries the response was YES. [2024-11-19 01:56:07,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132016 conditions, 44650 events. 26120/44650 cut-off events. For 172578/172578 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 349535 event pairs, 2548 based on Foata normal form. 45/37762 useless extension candidates. Maximal degree in co-relation 131951. Up to 8225 conditions per place. [2024-11-19 01:56:07,815 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 235 selfloop transitions, 442 changer transitions 158/838 dead transitions. [2024-11-19 01:56:07,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 838 transitions, 9911 flow [2024-11-19 01:56:07,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-19 01:56:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-19 01:56:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 637 transitions. [2024-11-19 01:56:07,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5986842105263158 [2024-11-19 01:56:07,817 INFO L175 Difference]: Start difference. First operand has 266 places, 386 transitions, 5917 flow. Second operand 38 states and 637 transitions. [2024-11-19 01:56:07,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 838 transitions, 9911 flow [2024-11-19 01:56:09,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 838 transitions, 9052 flow, removed 377 selfloop flow, removed 17 redundant places. [2024-11-19 01:56:09,032 INFO L231 Difference]: Finished difference. Result has 272 places, 465 transitions, 8118 flow [2024-11-19 01:56:09,032 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5331, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8118, PETRI_PLACES=272, PETRI_TRANSITIONS=465} [2024-11-19 01:56:09,033 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 245 predicate places. [2024-11-19 01:56:09,033 INFO L471 AbstractCegarLoop]: Abstraction has has 272 places, 465 transitions, 8118 flow [2024-11-19 01:56:09,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.64516129032258) internal successors, (268), 31 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:09,033 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:09,033 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:09,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 01:56:09,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 01:56:09,239 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:09,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:09,239 INFO L85 PathProgramCache]: Analyzing trace with hash -10149505, now seen corresponding path program 14 times [2024-11-19 01:56:09,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:09,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344088264] [2024-11-19 01:56:09,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:56:09,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:09,257 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:56:09,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 01:56:09,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:09,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344088264] [2024-11-19 01:56:09,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344088264] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:09,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209955087] [2024-11-19 01:56:09,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:56:09,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:09,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:09,371 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:56:09,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 01:56:09,455 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:56:09,455 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:09,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:56:09,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-19 01:56:09,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-19 01:56:09,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209955087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:09,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:09,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2024-11-19 01:56:09,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437137350] [2024-11-19 01:56:09,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:09,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 01:56:09,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:09,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 01:56:09,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-19 01:56:09,567 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:56:09,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 465 transitions, 8118 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:09,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:09,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:56:09,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:21,126 INFO L124 PetriNetUnfolderBase]: 39894/68010 cut-off events. [2024-11-19 01:56:21,126 INFO L125 PetriNetUnfolderBase]: For 256990/256990 co-relation queries the response was YES. [2024-11-19 01:56:21,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206793 conditions, 68010 events. 39894/68010 cut-off events. For 256990/256990 co-relation queries the response was YES. Maximal size of possible extension queue 1490. Compared 566283 event pairs, 6631 based on Foata normal form. 22/57508 useless extension candidates. Maximal degree in co-relation 206726. Up to 16814 conditions per place. [2024-11-19 01:56:22,127 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 209 selfloop transitions, 508 changer transitions 0/720 dead transitions. [2024-11-19 01:56:22,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 720 transitions, 13832 flow [2024-11-19 01:56:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:56:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:56:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-19 01:56:22,129 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2024-11-19 01:56:22,129 INFO L175 Difference]: Start difference. First operand has 272 places, 465 transitions, 8118 flow. Second operand 7 states and 135 transitions. [2024-11-19 01:56:22,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 720 transitions, 13832 flow [2024-11-19 01:56:24,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 720 transitions, 13641 flow, removed 5 selfloop flow, removed 17 redundant places. [2024-11-19 01:56:24,075 INFO L231 Difference]: Finished difference. Result has 253 places, 650 transitions, 12987 flow [2024-11-19 01:56:24,076 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7999, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12987, PETRI_PLACES=253, PETRI_TRANSITIONS=650} [2024-11-19 01:56:24,076 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 226 predicate places. [2024-11-19 01:56:24,077 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 650 transitions, 12987 flow [2024-11-19 01:56:24,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:24,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:24,077 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:24,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 01:56:24,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:24,278 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:24,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:24,279 INFO L85 PathProgramCache]: Analyzing trace with hash 624615532, now seen corresponding path program 15 times [2024-11-19 01:56:24,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:24,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944079690] [2024-11-19 01:56:24,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:56:24,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:24,334 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-19 01:56:24,334 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-19 01:56:24,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:24,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944079690] [2024-11-19 01:56:24,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944079690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:24,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378473534] [2024-11-19 01:56:24,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:56:24,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:24,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:24,675 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:56:24,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 01:56:24,877 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-19 01:56:24,877 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:24,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-19 01:56:24,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:25,180 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 01:56:25,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 10 [2024-11-19 01:56:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-19 01:56:25,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:25,219 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 01:56:25,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 01:56:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-19 01:56:25,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378473534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:25,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:25,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2024-11-19 01:56:25,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348783837] [2024-11-19 01:56:25,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:25,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-19 01:56:25,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:25,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-19 01:56:25,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 01:56:25,570 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-19 01:56:25,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 650 transitions, 12987 flow. Second operand has 38 states, 38 states have (on average 7.7368421052631575) internal successors, (294), 38 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:25,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:25,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-19 01:56:25,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand