./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.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 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:38:28,319 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:38:28,416 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:38:28,423 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:38:28,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:38:28,455 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:38:28,456 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:38:28,457 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:38:28,458 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:38:28,458 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:38:28,459 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:38:28,459 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:38:28,460 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:38:28,462 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:38:28,462 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:38:28,463 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:38:28,463 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:38:28,463 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:38:28,463 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:38:28,464 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:38:28,464 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:38:28,468 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:38:28,468 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:38:28,469 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:38:28,469 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:38:28,469 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:38:28,469 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:38:28,470 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:38:28,470 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:38:28,470 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:38:28,470 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:38:28,470 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:38:28,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:38:28,471 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:38:28,471 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:38:28,471 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:38:28,471 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:38:28,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:38:28,472 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:38:28,472 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:38:28,473 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:38:28,473 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:38:28,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2024-10-14 14:38:28,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:38:28,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:38:28,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:38:28,775 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:38:28,776 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:38:28,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-10-14 14:38:30,231 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:38:30,414 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:38:30,417 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-10-14 14:38:30,427 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c147b13/509499d4033145fd961b9b8840ce6486/FLAGf7f83a036 [2024-10-14 14:38:30,439 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c147b13/509499d4033145fd961b9b8840ce6486 [2024-10-14 14:38:30,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:38:30,443 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:38:30,444 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:38:30,444 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:38:30,449 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:38:30,450 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,451 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6414ae4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30, skipping insertion in model container [2024-10-14 14:38:30,451 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,474 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:38:30,698 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c[2904,2917] [2024-10-14 14:38:30,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:38:30,736 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:38:30,776 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c[2904,2917] [2024-10-14 14:38:30,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:38:30,841 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:38:30,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30 WrapperNode [2024-10-14 14:38:30,842 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:38:30,843 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:38:30,843 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:38:30,843 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:38:30,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,857 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,890 INFO L138 Inliner]: procedures = 25, calls = 40, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 272 [2024-10-14 14:38:30,891 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:38:30,892 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:38:30,892 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:38:30,892 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:38:30,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,909 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,929 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-14 14:38:30,930 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,930 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,939 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,949 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,951 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:38:30,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:38:30,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:38:30,957 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:38:30,958 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (1/1) ... [2024-10-14 14:38:30,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:38:30,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:38:31,011 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) [2024-10-14 14:38:31,014 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 [2024-10-14 14:38:31,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:38:31,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 14:38:31,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 14:38:31,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 14:38:31,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 14:38:31,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-14 14:38:31,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-14 14:38:31,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:38:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:38:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:38:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:38:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 14:38:31,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 14:38:31,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 14:38:31,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:38:31,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:38:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:38:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:38:31,070 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:38:31,220 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:38:31,223 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:38:31,658 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:38:31,658 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:38:32,019 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:38:32,019 INFO L314 CfgBuilder]: Removed 8 assume(true) statements. [2024-10-14 14:38:32,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:38:32 BoogieIcfgContainer [2024-10-14 14:38:32,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:38:32,023 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:38:32,023 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:38:32,027 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:38:32,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:38:30" (1/3) ... [2024-10-14 14:38:32,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412e0a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:38:32, skipping insertion in model container [2024-10-14 14:38:32,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:38:30" (2/3) ... [2024-10-14 14:38:32,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412e0a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:38:32, skipping insertion in model container [2024-10-14 14:38:32,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:38:32" (3/3) ... [2024-10-14 14:38:32,030 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-10-14 14:38:32,049 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:38:32,049 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:38:32,049 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:38:32,110 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-14 14:38:32,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 50 transitions, 121 flow [2024-10-14 14:38:32,185 INFO L124 PetriNetUnfolderBase]: 11/47 cut-off events. [2024-10-14 14:38:32,185 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 14:38:32,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 11/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-10-14 14:38:32,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 50 transitions, 121 flow [2024-10-14 14:38:32,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 46 transitions, 110 flow [2024-10-14 14:38:32,206 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:38:32,214 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;@68cbe513, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:38:32,214 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-14 14:38:32,232 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:38:32,232 INFO L124 PetriNetUnfolderBase]: 11/45 cut-off events. [2024-10-14 14:38:32,232 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 14:38:32,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:38:32,233 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:38:32,234 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:38:32,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:38:32,241 INFO L85 PathProgramCache]: Analyzing trace with hash -643790171, now seen corresponding path program 1 times [2024-10-14 14:38:32,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:38:32,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671397596] [2024-10-14 14:38:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:32,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:38:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:38:32,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:38:32,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671397596] [2024-10-14 14:38:32,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671397596] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:38:32,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:38:32,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:38:32,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467555603] [2024-10-14 14:38:32,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:38:32,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:38:32,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:38:32,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:38:32,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:38:32,814 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-10-14 14:38:32,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2024-10-14 14:38:32,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:38:32,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-10-14 14:38:32,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:38:33,305 INFO L124 PetriNetUnfolderBase]: 2373/3340 cut-off events. [2024-10-14 14:38:33,305 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-10-14 14:38:33,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 3340 events. 2373/3340 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15242 event pairs, 1692 based on Foata normal form. 339/2982 useless extension candidates. Maximal degree in co-relation 6310. Up to 3232 conditions per place. [2024-10-14 14:38:33,336 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 38 selfloop transitions, 2 changer transitions 3/47 dead transitions. [2024-10-14 14:38:33,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 198 flow [2024-10-14 14:38:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:38:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:38:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-10-14 14:38:33,349 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.332 [2024-10-14 14:38:33,351 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 110 flow. Second operand 5 states and 83 transitions. [2024-10-14 14:38:33,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 198 flow [2024-10-14 14:38:33,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 186 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 14:38:33,361 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 110 flow [2024-10-14 14:38:33,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-10-14 14:38:33,366 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2024-10-14 14:38:33,369 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 110 flow [2024-10-14 14:38:33,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2024-10-14 14:38:33,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:38:33,369 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:38:33,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:38:33,370 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:38:33,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:38:33,371 INFO L85 PathProgramCache]: Analyzing trace with hash 389702561, now seen corresponding path program 1 times [2024-10-14 14:38:33,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:38:33,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411565481] [2024-10-14 14:38:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:33,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:38:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:38:33,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:38:33,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411565481] [2024-10-14 14:38:33,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411565481] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:38:33,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559197513] [2024-10-14 14:38:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:33,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:38:33,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:38:33,572 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) [2024-10-14 14:38:33,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:38:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:33,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:38:33,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:38:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:38:33,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:38:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:38:33,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559197513] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:38:33,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:38:33,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-10-14 14:38:33,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351429166] [2024-10-14 14:38:33,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:38:33,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:38:33,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:38:33,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:38:33,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-14 14:38:33,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-10-14 14:38:33,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2024-10-14 14:38:33,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:38:33,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-10-14 14:38:33,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:38:34,249 INFO L124 PetriNetUnfolderBase]: 2677/3766 cut-off events. [2024-10-14 14:38:34,250 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-10-14 14:38:34,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7496 conditions, 3766 events. 2677/3766 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17544 event pairs, 794 based on Foata normal form. 0/3023 useless extension candidates. Maximal degree in co-relation 7483. Up to 2323 conditions per place. [2024-10-14 14:38:34,269 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 57 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2024-10-14 14:38:34,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 280 flow [2024-10-14 14:38:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:38:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:38:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-10-14 14:38:34,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.392 [2024-10-14 14:38:34,273 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 110 flow. Second operand 5 states and 98 transitions. [2024-10-14 14:38:34,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 280 flow [2024-10-14 14:38:34,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 66 transitions, 270 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-14 14:38:34,275 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 123 flow [2024-10-14 14:38:34,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-10-14 14:38:34,276 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2024-10-14 14:38:34,277 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 123 flow [2024-10-14 14:38:34,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2024-10-14 14:38:34,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:38:34,277 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:38:34,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 14:38:34,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:38:34,479 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:38:34,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:38:34,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1767188247, now seen corresponding path program 1 times [2024-10-14 14:38:34,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:38:34,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010379152] [2024-10-14 14:38:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:38:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:38:34,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:38:34,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010379152] [2024-10-14 14:38:34,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010379152] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:38:34,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089058299] [2024-10-14 14:38:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:34,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:38:34,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:38:34,581 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) [2024-10-14 14:38:34,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:38:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:34,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 14:38:34,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:38:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:38:34,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:38:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:38:34,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089058299] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:38:34,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:38:34,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-10-14 14:38:34,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248794896] [2024-10-14 14:38:34,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:38:34,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:38:34,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:38:34,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:38:34,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:38:34,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-10-14 14:38:34,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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) [2024-10-14 14:38:34,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:38:34,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-10-14 14:38:34,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:38:35,242 INFO L124 PetriNetUnfolderBase]: 3003/4236 cut-off events. [2024-10-14 14:38:35,242 INFO L125 PetriNetUnfolderBase]: For 1295/1295 co-relation queries the response was YES. [2024-10-14 14:38:35,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9433 conditions, 4236 events. 3003/4236 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20053 event pairs, 881 based on Foata normal form. 0/3555 useless extension candidates. Maximal degree in co-relation 9414. Up to 2470 conditions per place. [2024-10-14 14:38:35,264 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 58 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-10-14 14:38:35,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 307 flow [2024-10-14 14:38:35,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:38:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:38:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-10-14 14:38:35,266 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-10-14 14:38:35,266 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 123 flow. Second operand 4 states and 88 transitions. [2024-10-14 14:38:35,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 307 flow [2024-10-14 14:38:35,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 298 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 14:38:35,268 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 138 flow [2024-10-14 14:38:35,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2024-10-14 14:38:35,270 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2024-10-14 14:38:35,270 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 138 flow [2024-10-14 14:38:35,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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) [2024-10-14 14:38:35,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:38:35,271 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:38:35,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-14 14:38:35,471 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,SelfDestructingSolverStorable2 [2024-10-14 14:38:35,472 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:38:35,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:38:35,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1329234884, now seen corresponding path program 1 times [2024-10-14 14:38:35,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:38:35,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411184767] [2024-10-14 14:38:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:35,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:38:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:38:35,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:38:35,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411184767] [2024-10-14 14:38:35,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411184767] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:38:35,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:38:35,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:38:35,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314038147] [2024-10-14 14:38:35,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:38:35,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:38:35,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:38:35,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:38:35,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:38:35,597 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-10-14 14:38:35,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-10-14 14:38:35,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:38:35,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-10-14 14:38:35,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:38:36,207 INFO L124 PetriNetUnfolderBase]: 5022/7069 cut-off events. [2024-10-14 14:38:36,207 INFO L125 PetriNetUnfolderBase]: For 3084/3084 co-relation queries the response was YES. [2024-10-14 14:38:36,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17044 conditions, 7069 events. 5022/7069 cut-off events. For 3084/3084 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 35836 event pairs, 1438 based on Foata normal form. 1/6066 useless extension candidates. Maximal degree in co-relation 17024. Up to 4351 conditions per place. [2024-10-14 14:38:36,247 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 68 selfloop transitions, 4 changer transitions 1/77 dead transitions. [2024-10-14 14:38:36,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 380 flow [2024-10-14 14:38:36,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:38:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:38:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-10-14 14:38:36,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-10-14 14:38:36,250 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 138 flow. Second operand 3 states and 90 transitions. [2024-10-14 14:38:36,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 380 flow [2024-10-14 14:38:36,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 14:38:36,263 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 160 flow [2024-10-14 14:38:36,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-10-14 14:38:36,264 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2024-10-14 14:38:36,265 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 160 flow [2024-10-14 14:38:36,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-10-14 14:38:36,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:38:36,265 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:38:36,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:38:36,266 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:38:36,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:38:36,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1146571422, now seen corresponding path program 1 times [2024-10-14 14:38:36,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:38:36,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000617707] [2024-10-14 14:38:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:36,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:38:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:38:36,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:38:36,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000617707] [2024-10-14 14:38:36,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000617707] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:38:36,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:38:36,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 14:38:36,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587585089] [2024-10-14 14:38:36,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:38:36,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:38:36,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:38:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:38:36,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:38:36,439 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 50 [2024-10-14 14:38:36,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2024-10-14 14:38:36,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:38:36,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 50 [2024-10-14 14:38:36,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:38:37,895 INFO L124 PetriNetUnfolderBase]: 9996/13941 cut-off events. [2024-10-14 14:38:37,895 INFO L125 PetriNetUnfolderBase]: For 6351/6351 co-relation queries the response was YES. [2024-10-14 14:38:37,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34832 conditions, 13941 events. 9996/13941 cut-off events. For 6351/6351 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 76091 event pairs, 5933 based on Foata normal form. 0/12116 useless extension candidates. Maximal degree in co-relation 34810. Up to 7669 conditions per place. [2024-10-14 14:38:37,980 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 124 selfloop transitions, 8 changer transitions 0/135 dead transitions. [2024-10-14 14:38:37,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 135 transitions, 692 flow [2024-10-14 14:38:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:38:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:38:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-10-14 14:38:37,982 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-10-14 14:38:37,982 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 160 flow. Second operand 6 states and 153 transitions. [2024-10-14 14:38:37,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 135 transitions, 692 flow [2024-10-14 14:38:37,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 135 transitions, 682 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:38:37,997 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 226 flow [2024-10-14 14:38:37,998 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-10-14 14:38:37,999 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-10-14 14:38:37,999 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 226 flow [2024-10-14 14:38:37,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2024-10-14 14:38:37,999 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:38:37,999 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:38:38,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 14:38:38,000 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:38:38,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:38:38,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1360117292, now seen corresponding path program 1 times [2024-10-14 14:38:38,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:38:38,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104120971] [2024-10-14 14:38:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:38,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:38:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:38:38,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:38:38,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104120971] [2024-10-14 14:38:38,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104120971] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:38:38,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:38:38,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 14:38:38,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597712716] [2024-10-14 14:38:38,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:38:38,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:38:38,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:38:38,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:38:38,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:38:38,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 50 [2024-10-14 14:38:38,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2024-10-14 14:38:38,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:38:38,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 50 [2024-10-14 14:38:38,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:38:39,293 INFO L124 PetriNetUnfolderBase]: 8807/12260 cut-off events. [2024-10-14 14:38:39,293 INFO L125 PetriNetUnfolderBase]: For 11268/11457 co-relation queries the response was YES. [2024-10-14 14:38:39,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33278 conditions, 12260 events. 8807/12260 cut-off events. For 11268/11457 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 64471 event pairs, 5542 based on Foata normal form. 189/10956 useless extension candidates. Maximal degree in co-relation 33251. Up to 7624 conditions per place. [2024-10-14 14:38:39,372 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 108 selfloop transitions, 8 changer transitions 0/120 dead transitions. [2024-10-14 14:38:39,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 120 transitions, 686 flow [2024-10-14 14:38:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:38:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:38:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-10-14 14:38:39,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-10-14 14:38:39,374 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 226 flow. Second operand 6 states and 140 transitions. [2024-10-14 14:38:39,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 120 transitions, 686 flow [2024-10-14 14:38:39,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 120 transitions, 682 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:38:39,394 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 279 flow [2024-10-14 14:38:39,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-10-14 14:38:39,397 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-10-14 14:38:39,397 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 279 flow [2024-10-14 14:38:39,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2024-10-14 14:38:39,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:38:39,397 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:38:39,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 14:38:39,398 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:38:39,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:38:39,398 INFO L85 PathProgramCache]: Analyzing trace with hash 292540957, now seen corresponding path program 1 times [2024-10-14 14:38:39,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:38:39,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817039636] [2024-10-14 14:38:39,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:39,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:38:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:38:39,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:38:39,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817039636] [2024-10-14 14:38:39,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817039636] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:38:39,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625374773] [2024-10-14 14:38:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:39,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:38:39,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:38:39,729 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) [2024-10-14 14:38:39,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 14:38:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:39,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 14:38:39,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:38:39,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-10-14 14:38:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:38:39,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:38:40,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2024-10-14 14:38:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:38:40,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625374773] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:38:40,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:38:40,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:38:40,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734084514] [2024-10-14 14:38:40,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:38:40,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:38:40,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:38:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:38:40,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:38:40,118 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 50 [2024-10-14 14:38:40,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 279 flow. Second operand has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 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) [2024-10-14 14:38:40,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:38:40,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 50 [2024-10-14 14:38:40,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:38:41,778 INFO L124 PetriNetUnfolderBase]: 13231/18633 cut-off events. [2024-10-14 14:38:41,778 INFO L125 PetriNetUnfolderBase]: For 19078/19200 co-relation queries the response was YES. [2024-10-14 14:38:41,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53928 conditions, 18633 events. 13231/18633 cut-off events. For 19078/19200 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 106860 event pairs, 7388 based on Foata normal form. 122/16531 useless extension candidates. Maximal degree in co-relation 53897. Up to 7669 conditions per place. [2024-10-14 14:38:42,000 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 136 selfloop transitions, 15 changer transitions 0/155 dead transitions. [2024-10-14 14:38:42,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 155 transitions, 951 flow [2024-10-14 14:38:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 14:38:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 14:38:42,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-10-14 14:38:42,003 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-10-14 14:38:42,003 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 279 flow. Second operand 7 states and 161 transitions. [2024-10-14 14:38:42,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 155 transitions, 951 flow [2024-10-14 14:38:42,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 155 transitions, 946 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 14:38:42,144 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 383 flow [2024-10-14 14:38:42,144 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-10-14 14:38:42,145 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-10-14 14:38:42,145 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 383 flow [2024-10-14 14:38:42,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 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) [2024-10-14 14:38:42,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:38:42,145 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:38:42,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 14:38:42,351 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 [2024-10-14 14:38:42,352 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:38:42,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:38:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1332575869, now seen corresponding path program 1 times [2024-10-14 14:38:42,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:38:42,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467315075] [2024-10-14 14:38:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:42,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:38:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:38:42,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:38:42,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467315075] [2024-10-14 14:38:42,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467315075] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:38:42,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264166739] [2024-10-14 14:38:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:42,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:38:42,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:38:42,581 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) [2024-10-14 14:38:42,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 14:38:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:42,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 14:38:42,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:38:42,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-10-14 14:38:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:38:42,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:38:42,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2024-10-14 14:38:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:38:42,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264166739] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:38:42,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:38:42,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 14:38:42,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197107657] [2024-10-14 14:38:42,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:38:42,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:38:42,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:38:42,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:38:42,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:38:42,934 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 50 [2024-10-14 14:38:42,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 383 flow. Second operand has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 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) [2024-10-14 14:38:42,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:38:42,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 50 [2024-10-14 14:38:42,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:38:44,424 INFO L124 PetriNetUnfolderBase]: 12016/16800 cut-off events. [2024-10-14 14:38:44,425 INFO L125 PetriNetUnfolderBase]: For 33328/33895 co-relation queries the response was YES. [2024-10-14 14:38:44,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53542 conditions, 16800 events. 12016/16800 cut-off events. For 33328/33895 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 92886 event pairs, 7043 based on Foata normal form. 567/15452 useless extension candidates. Maximal degree in co-relation 53507. Up to 7624 conditions per place. [2024-10-14 14:38:44,529 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 120 selfloop transitions, 15 changer transitions 0/140 dead transitions. [2024-10-14 14:38:44,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 140 transitions, 1003 flow [2024-10-14 14:38:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 14:38:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 14:38:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-10-14 14:38:44,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2024-10-14 14:38:44,531 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 383 flow. Second operand 7 states and 148 transitions. [2024-10-14 14:38:44,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 140 transitions, 1003 flow [2024-10-14 14:38:44,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 140 transitions, 980 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-10-14 14:38:44,630 INFO L231 Difference]: Finished difference. Result has 80 places, 73 transitions, 452 flow [2024-10-14 14:38:44,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=452, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2024-10-14 14:38:44,631 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-10-14 14:38:44,633 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 452 flow [2024-10-14 14:38:44,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 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) [2024-10-14 14:38:44,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:38:44,633 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:38:44,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 14:38:44,837 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 [2024-10-14 14:38:44,838 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:38:44,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:38:44,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1929539554, now seen corresponding path program 2 times [2024-10-14 14:38:44,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:38:44,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961018840] [2024-10-14 14:38:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:38:44,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:38:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:38:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:38:45,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:38:45,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961018840] [2024-10-14 14:38:45,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961018840] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:38:45,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689620009] [2024-10-14 14:38:45,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:38:45,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:38:45,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:38:45,765 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) [2024-10-14 14:38:45,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 14:38:45,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:38:45,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:38:45,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 14:38:45,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:38:46,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-14 14:38:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:38:46,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:38:46,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:38:46,381 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 25 treesize of output 17 [2024-10-14 14:38:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:38:46,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689620009] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:38:46,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:38:46,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 36 [2024-10-14 14:38:46,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949129126] [2024-10-14 14:38:46,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:38:46,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-14 14:38:46,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:38:46,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-14 14:38:46,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2024-10-14 14:38:46,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 50 [2024-10-14 14:38:46,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 452 flow. Second operand has 37 states, 37 states have (on average 7.351351351351352) internal successors, (272), 37 states have internal predecessors, (272), 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) [2024-10-14 14:38:46,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:38:46,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 50 [2024-10-14 14:38:46,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:38:57,083 INFO L124 PetriNetUnfolderBase]: 62311/85567 cut-off events. [2024-10-14 14:38:57,084 INFO L125 PetriNetUnfolderBase]: For 130462/130462 co-relation queries the response was YES. [2024-10-14 14:38:57,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272229 conditions, 85567 events. 62311/85567 cut-off events. For 130462/130462 co-relation queries the response was YES. Maximal size of possible extension queue 2307. Compared 549381 event pairs, 23296 based on Foata normal form. 0/74661 useless extension candidates. Maximal degree in co-relation 208929. Up to 18894 conditions per place. [2024-10-14 14:38:57,919 INFO L140 encePairwiseOnDemand]: 31/50 looper letters, 816 selfloop transitions, 107 changer transitions 0/925 dead transitions. [2024-10-14 14:38:57,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 925 transitions, 5881 flow [2024-10-14 14:38:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-14 14:38:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-10-14 14:38:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 1002 transitions. [2024-10-14 14:38:57,923 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47714285714285715 [2024-10-14 14:38:57,923 INFO L175 Difference]: Start difference. First operand has 80 places, 73 transitions, 452 flow. Second operand 42 states and 1002 transitions. [2024-10-14 14:38:57,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 925 transitions, 5881 flow [2024-10-14 14:39:00,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 925 transitions, 5597 flow, removed 134 selfloop flow, removed 3 redundant places. [2024-10-14 14:39:00,109 INFO L231 Difference]: Finished difference. Result has 153 places, 178 transitions, 1623 flow [2024-10-14 14:39:00,110 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1623, PETRI_PLACES=153, PETRI_TRANSITIONS=178} [2024-10-14 14:39:00,110 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-10-14 14:39:00,111 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 178 transitions, 1623 flow [2024-10-14 14:39:00,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 7.351351351351352) internal successors, (272), 37 states have internal predecessors, (272), 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) [2024-10-14 14:39:00,111 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:00,111 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:00,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-14 14:39:00,312 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 [2024-10-14 14:39:00,313 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:39:00,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2143374978, now seen corresponding path program 2 times [2024-10-14 14:39:00,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:00,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110895425] [2024-10-14 14:39:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:00,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:39:00,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:00,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110895425] [2024-10-14 14:39:00,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110895425] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:00,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848346533] [2024-10-14 14:39:00,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:39:00,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:00,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:00,801 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) [2024-10-14 14:39:00,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 14:39:00,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:39:00,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:00,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 14:39:00,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:01,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-14 14:39:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:39:01,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:01,216 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:39:01,216 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 23 treesize of output 15 [2024-10-14 14:39:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:39:01,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848346533] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:01,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:01,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2024-10-14 14:39:01,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323319346] [2024-10-14 14:39:01,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:01,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-14 14:39:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:01,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-14 14:39:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2024-10-14 14:39:01,447 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 50 [2024-10-14 14:39:01,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 178 transitions, 1623 flow. Second operand has 32 states, 32 states have (on average 7.25) internal successors, (232), 32 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:39:01,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:01,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 50 [2024-10-14 14:39:01,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:39:15,150 INFO L124 PetriNetUnfolderBase]: 73272/100416 cut-off events. [2024-10-14 14:39:15,150 INFO L125 PetriNetUnfolderBase]: For 756671/756671 co-relation queries the response was YES. [2024-10-14 14:39:16,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482338 conditions, 100416 events. 73272/100416 cut-off events. For 756671/756671 co-relation queries the response was YES. Maximal size of possible extension queue 2881. Compared 664486 event pairs, 21320 based on Foata normal form. 0/88424 useless extension candidates. Maximal degree in co-relation 418990. Up to 21904 conditions per place. [2024-10-14 14:39:17,112 INFO L140 encePairwiseOnDemand]: 33/50 looper letters, 517 selfloop transitions, 76 changer transitions 0/595 dead transitions. [2024-10-14 14:39:17,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 595 transitions, 6317 flow [2024-10-14 14:39:17,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 14:39:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-14 14:39:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 399 transitions. [2024-10-14 14:39:17,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46941176470588236 [2024-10-14 14:39:17,114 INFO L175 Difference]: Start difference. First operand has 153 places, 178 transitions, 1623 flow. Second operand 17 states and 399 transitions. [2024-10-14 14:39:17,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 595 transitions, 6317 flow [2024-10-14 14:39:26,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 595 transitions, 6127 flow, removed 94 selfloop flow, removed 1 redundant places. [2024-10-14 14:39:26,963 INFO L231 Difference]: Finished difference. Result has 177 places, 217 transitions, 2250 flow [2024-10-14 14:39:26,963 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2250, PETRI_PLACES=177, PETRI_TRANSITIONS=217} [2024-10-14 14:39:26,964 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-10-14 14:39:26,964 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 217 transitions, 2250 flow [2024-10-14 14:39:26,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.25) internal successors, (232), 32 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:39:26,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:39:26,965 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:39:26,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 14:39:27,165 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 [2024-10-14 14:39:27,165 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:39:27,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:39:27,166 INFO L85 PathProgramCache]: Analyzing trace with hash -682567336, now seen corresponding path program 3 times [2024-10-14 14:39:27,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:39:27,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177973564] [2024-10-14 14:39:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:39:27,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:39:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:39:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:39:27,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:39:27,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177973564] [2024-10-14 14:39:27,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177973564] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:39:27,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871465097] [2024-10-14 14:39:27,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:39:27,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:39:27,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:39:27,625 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) [2024-10-14 14:39:27,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 14:39:27,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 14:39:27,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:39:27,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 14:39:27,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:39:27,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-14 14:39:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:39:27,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:39:28,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:39:28,043 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 21 treesize of output 17 [2024-10-14 14:39:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:39:28,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871465097] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:39:28,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:39:28,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2024-10-14 14:39:28,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073008771] [2024-10-14 14:39:28,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:39:28,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 14:39:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:39:28,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 14:39:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 14:39:28,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 50 [2024-10-14 14:39:28,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 217 transitions, 2250 flow. Second operand has 33 states, 33 states have (on average 7.515151515151516) internal successors, (248), 33 states have internal predecessors, (248), 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) [2024-10-14 14:39:28,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:39:28,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 50 [2024-10-14 14:39:28,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand