./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-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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-buffer-mult-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:10:25,961 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:10:26,058 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:10:26,063 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:10:26,065 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:10:26,094 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:10:26,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:10:26,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:10:26,096 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:10:26,097 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:10:26,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:10:26,098 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:10:26,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:10:26,099 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:10:26,100 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:10:26,101 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:10:26,101 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:10:26,101 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:10:26,102 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:10:26,102 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:10:26,102 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:10:26,105 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:10:26,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:10:26,106 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:10:26,106 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:10:26,106 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:10:26,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:10:26,107 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:10:26,107 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:10:26,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:10:26,108 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:10:26,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:10:26,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:10:26,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:10:26,109 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:10:26,110 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:10:26,110 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:10:26,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:10:26,110 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:10:26,110 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:10:26,111 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:10:26,111 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:10:26,111 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f [2024-10-13 07:10:26,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:10:26,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:10:26,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:10:26,402 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:10:26,403 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:10:26,404 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-10-13 07:10:27,905 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:10:28,111 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:10:28,112 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-10-13 07:10:28,125 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4023dbd99/46a7a6d3c5394865958db1420d4c74c5/FLAGef57eebd9 [2024-10-13 07:10:28,137 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4023dbd99/46a7a6d3c5394865958db1420d4c74c5 [2024-10-13 07:10:28,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:10:28,141 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:10:28,143 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:10:28,143 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:10:28,149 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:10:28,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,151 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb797da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28, skipping insertion in model container [2024-10-13 07:10:28,151 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,179 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:10:28,417 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-buffer-mult-alt.wvr.c[4345,4358] [2024-10-13 07:10:28,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:10:28,447 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:10:28,483 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-buffer-mult-alt.wvr.c[4345,4358] [2024-10-13 07:10:28,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:10:28,514 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:10:28,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28 WrapperNode [2024-10-13 07:10:28,515 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:10:28,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:10:28,517 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:10:28,517 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:10:28,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,533 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,573 INFO L138 Inliner]: procedures = 25, calls = 59, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 311 [2024-10-13 07:10:28,573 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:10:28,574 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:10:28,574 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:10:28,574 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:10:28,590 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,597 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,623 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 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]. [2024-10-13 07:10:28,624 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,635 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,640 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,642 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,644 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,647 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:10:28,648 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:10:28,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:10:28,649 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:10:28,651 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (1/1) ... [2024-10-13 07:10:28,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:10:28,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:28,686 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) [2024-10-13 07:10:28,690 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 [2024-10-13 07:10:28,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:10:28,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:10:28,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:10:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:10:28,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:10:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-13 07:10:28,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-13 07:10:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-13 07:10:28,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-13 07:10:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:10:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:10:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:10:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:10:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:10:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:10:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:10:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:10:28,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:10:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:10:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:10:28,740 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:10:28,842 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:10:28,844 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:10:29,297 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:10:29,297 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:10:29,669 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:10:29,670 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-13 07:10:29,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:10:29 BoogieIcfgContainer [2024-10-13 07:10:29,671 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:10:29,673 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:10:29,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:10:29,677 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:10:29,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:10:28" (1/3) ... [2024-10-13 07:10:29,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341abb6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:10:29, skipping insertion in model container [2024-10-13 07:10:29,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:28" (2/3) ... [2024-10-13 07:10:29,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341abb6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:10:29, skipping insertion in model container [2024-10-13 07:10:29,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:10:29" (3/3) ... [2024-10-13 07:10:29,682 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2024-10-13 07:10:29,700 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:10:29,700 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:10:29,701 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:10:29,809 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-13 07:10:29,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 50 transitions, 128 flow [2024-10-13 07:10:29,889 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2024-10-13 07:10:29,889 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 07:10:29,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 46 events. 6/46 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 85 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-10-13 07:10:29,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 50 transitions, 128 flow [2024-10-13 07:10:29,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 45 transitions, 114 flow [2024-10-13 07:10:29,908 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:10:29,915 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;@6c8b281c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:10:29,915 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-13 07:10:29,934 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:10:29,935 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2024-10-13 07:10:29,935 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 07:10:29,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:29,936 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] [2024-10-13 07:10:29,937 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 2 more)] === [2024-10-13 07:10:29,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash 141731549, now seen corresponding path program 1 times [2024-10-13 07:10:29,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:29,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718319537] [2024-10-13 07:10:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:29,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:30,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:30,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718319537] [2024-10-13 07:10:30,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718319537] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:30,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:30,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:10:30,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527525150] [2024-10-13 07:10:30,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:30,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:10:30,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:30,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:10:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:10:30,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-10-13 07:10:30,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:10:30,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:30,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-10-13 07:10:30,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:31,812 INFO L124 PetriNetUnfolderBase]: 3597/5250 cut-off events. [2024-10-13 07:10:31,812 INFO L125 PetriNetUnfolderBase]: For 401/401 co-relation queries the response was YES. [2024-10-13 07:10:31,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10335 conditions, 5250 events. 3597/5250 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31111 event pairs, 206 based on Foata normal form. 222/5387 useless extension candidates. Maximal degree in co-relation 9266. Up to 2693 conditions per place. [2024-10-13 07:10:31,868 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 70 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2024-10-13 07:10:31,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 92 transitions, 395 flow [2024-10-13 07:10:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:10:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:10:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-10-13 07:10:31,884 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6433333333333333 [2024-10-13 07:10:31,886 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 114 flow. Second operand 6 states and 193 transitions. [2024-10-13 07:10:31,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 92 transitions, 395 flow [2024-10-13 07:10:31,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 92 transitions, 357 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-13 07:10:31,902 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 145 flow [2024-10-13 07:10:31,905 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=145, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-10-13 07:10:31,908 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-10-13 07:10:31,909 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 145 flow [2024-10-13 07:10:31,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:10:31,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:31,910 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, 1, 1, 1] [2024-10-13 07:10:31,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:10:31,911 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 2 more)] === [2024-10-13 07:10:31,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:31,912 INFO L85 PathProgramCache]: Analyzing trace with hash 165154878, now seen corresponding path program 1 times [2024-10-13 07:10:31,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:31,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058675409] [2024-10-13 07:10:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:31,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:32,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:32,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058675409] [2024-10-13 07:10:32,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058675409] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:32,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:32,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:10:32,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226215026] [2024-10-13 07:10:32,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:32,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:10:32,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:32,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:10:32,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:10:32,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-13 07:10:32,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-10-13 07:10:32,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:32,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-13 07:10:32,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:32,591 INFO L124 PetriNetUnfolderBase]: 2354/3510 cut-off events. [2024-10-13 07:10:32,592 INFO L125 PetriNetUnfolderBase]: For 1622/1968 co-relation queries the response was YES. [2024-10-13 07:10:32,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8202 conditions, 3510 events. 2354/3510 cut-off events. For 1622/1968 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 19647 event pairs, 240 based on Foata normal form. 281/3591 useless extension candidates. Maximal degree in co-relation 3291. Up to 2745 conditions per place. [2024-10-13 07:10:32,626 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 43 selfloop transitions, 2 changer transitions 2/66 dead transitions. [2024-10-13 07:10:32,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 276 flow [2024-10-13 07:10:32,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:10:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:10:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-10-13 07:10:32,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.72 [2024-10-13 07:10:32,628 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 145 flow. Second operand 3 states and 108 transitions. [2024-10-13 07:10:32,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 276 flow [2024-10-13 07:10:32,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 66 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 07:10:32,634 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 152 flow [2024-10-13 07:10:32,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-10-13 07:10:32,635 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-10-13 07:10:32,636 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 152 flow [2024-10-13 07:10:32,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-10-13 07:10:32,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:32,636 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, 1, 1, 1, 1] [2024-10-13 07:10:32,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:10:32,637 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 2 more)] === [2024-10-13 07:10:32,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:32,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2013548560, now seen corresponding path program 1 times [2024-10-13 07:10:32,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:32,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179576649] [2024-10-13 07:10:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:32,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:32,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:32,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179576649] [2024-10-13 07:10:32,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179576649] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:32,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:32,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:10:32,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911707751] [2024-10-13 07:10:32,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:32,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:10:32,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:10:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:10:32,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-10-13 07:10:32,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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) [2024-10-13 07:10:32,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:32,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-10-13 07:10:32,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:34,137 INFO L124 PetriNetUnfolderBase]: 6731/9910 cut-off events. [2024-10-13 07:10:34,137 INFO L125 PetriNetUnfolderBase]: For 3774/3774 co-relation queries the response was YES. [2024-10-13 07:10:34,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23265 conditions, 9910 events. 6731/9910 cut-off events. For 3774/3774 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 62712 event pairs, 1208 based on Foata normal form. 111/9813 useless extension candidates. Maximal degree in co-relation 7057. Up to 2832 conditions per place. [2024-10-13 07:10:34,216 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 80 selfloop transitions, 14 changer transitions 0/109 dead transitions. [2024-10-13 07:10:34,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 109 transitions, 521 flow [2024-10-13 07:10:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:10:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:10:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-10-13 07:10:34,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-10-13 07:10:34,221 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 152 flow. Second operand 6 states and 198 transitions. [2024-10-13 07:10:34,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 109 transitions, 521 flow [2024-10-13 07:10:34,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 109 transitions, 519 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:10:34,233 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 269 flow [2024-10-13 07:10:34,234 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-10-13 07:10:34,234 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-10-13 07:10:34,235 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 269 flow [2024-10-13 07:10:34,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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) [2024-10-13 07:10:34,235 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:34,236 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:34,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:10:34,236 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 2 more)] === [2024-10-13 07:10:34,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:34,237 INFO L85 PathProgramCache]: Analyzing trace with hash -838092421, now seen corresponding path program 1 times [2024-10-13 07:10:34,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:34,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089125619] [2024-10-13 07:10:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:34,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:34,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:34,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089125619] [2024-10-13 07:10:34,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089125619] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:34,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:34,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:10:34,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802969257] [2024-10-13 07:10:34,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:34,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:10:34,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:10:34,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:10:34,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-13 07:10:34,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2024-10-13 07:10:34,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:34,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-13 07:10:34,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:35,694 INFO L124 PetriNetUnfolderBase]: 5939/9170 cut-off events. [2024-10-13 07:10:35,694 INFO L125 PetriNetUnfolderBase]: For 14442/15347 co-relation queries the response was YES. [2024-10-13 07:10:35,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24454 conditions, 9170 events. 5939/9170 cut-off events. For 14442/15347 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 62709 event pairs, 3613 based on Foata normal form. 615/9079 useless extension candidates. Maximal degree in co-relation 8470. Up to 7381 conditions per place. [2024-10-13 07:10:35,782 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 36 selfloop transitions, 2 changer transitions 19/81 dead transitions. [2024-10-13 07:10:35,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 81 transitions, 436 flow [2024-10-13 07:10:35,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:10:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:10:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-10-13 07:10:35,784 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-10-13 07:10:35,785 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 269 flow. Second operand 5 states and 154 transitions. [2024-10-13 07:10:35,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 81 transitions, 436 flow [2024-10-13 07:10:35,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 07:10:35,800 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 282 flow [2024-10-13 07:10:35,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-10-13 07:10:35,802 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2024-10-13 07:10:35,802 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 282 flow [2024-10-13 07:10:35,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2024-10-13 07:10:35,802 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:35,803 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:35,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 07:10:35,803 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 2 more)] === [2024-10-13 07:10:35,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:35,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1608930405, now seen corresponding path program 1 times [2024-10-13 07:10:35,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:35,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225563685] [2024-10-13 07:10:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:35,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:36,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:36,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225563685] [2024-10-13 07:10:36,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225563685] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:10:36,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161417961] [2024-10-13 07:10:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:36,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:36,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:36,835 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) [2024-10-13 07:10:36,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:10:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:36,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:10:36,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:10:37,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-13 07:10:37,395 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 [2024-10-13 07:10:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:37,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:10:37,920 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 39 treesize of output 35 [2024-10-13 07:10:37,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 47 treesize of output 35 [2024-10-13 07:10:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:37,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161417961] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:10:37,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:10:37,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-10-13 07:10:37,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936168475] [2024-10-13 07:10:37,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:10:37,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:10:37,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:37,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:10:37,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:10:38,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-13 07:10:38,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 282 flow. Second operand has 18 states, 18 states have (on average 23.77777777777778) internal successors, (428), 18 states have internal predecessors, (428), 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) [2024-10-13 07:10:38,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:38,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-13 07:10:38,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:44,014 INFO L124 PetriNetUnfolderBase]: 21478/32722 cut-off events. [2024-10-13 07:10:44,014 INFO L125 PetriNetUnfolderBase]: For 44302/46701 co-relation queries the response was YES. [2024-10-13 07:10:44,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86889 conditions, 32722 events. 21478/32722 cut-off events. For 44302/46701 co-relation queries the response was YES. Maximal size of possible extension queue 1349. Compared 238918 event pairs, 856 based on Foata normal form. 1571/33355 useless extension candidates. Maximal degree in co-relation 86868. Up to 10360 conditions per place. [2024-10-13 07:10:44,414 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 276 selfloop transitions, 72 changer transitions 12/384 dead transitions. [2024-10-13 07:10:44,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 384 transitions, 2188 flow [2024-10-13 07:10:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 07:10:44,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-13 07:10:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 838 transitions. [2024-10-13 07:10:44,423 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6983333333333334 [2024-10-13 07:10:44,424 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 282 flow. Second operand 24 states and 838 transitions. [2024-10-13 07:10:44,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 384 transitions, 2188 flow [2024-10-13 07:10:44,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 384 transitions, 2162 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-10-13 07:10:44,518 INFO L231 Difference]: Finished difference. Result has 94 places, 135 transitions, 962 flow [2024-10-13 07:10:44,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=962, PETRI_PLACES=94, PETRI_TRANSITIONS=135} [2024-10-13 07:10:44,521 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2024-10-13 07:10:44,522 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 135 transitions, 962 flow [2024-10-13 07:10:44,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.77777777777778) internal successors, (428), 18 states have internal predecessors, (428), 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) [2024-10-13 07:10:44,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:44,524 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, 1, 1, 1, 1, 1] [2024-10-13 07:10:44,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 07:10:44,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:44,725 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 2 more)] === [2024-10-13 07:10:44,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:44,726 INFO L85 PathProgramCache]: Analyzing trace with hash 659510984, now seen corresponding path program 1 times [2024-10-13 07:10:44,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:44,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814313937] [2024-10-13 07:10:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:44,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:10:45,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:45,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814313937] [2024-10-13 07:10:45,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814313937] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:10:45,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168389451] [2024-10-13 07:10:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:45,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:45,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:45,017 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) [2024-10-13 07:10:45,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:10:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:45,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:10:45,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:10:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:10:45,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:10:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:10:45,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168389451] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:10:45,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:10:45,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-10-13 07:10:45,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754504868] [2024-10-13 07:10:45,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:10:45,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 07:10:45,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:45,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 07:10:45,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:10:45,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-10-13 07:10:45,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 135 transitions, 962 flow. Second operand has 15 states, 15 states have (on average 22.666666666666668) internal successors, (340), 15 states have internal predecessors, (340), 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) [2024-10-13 07:10:45,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:45,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-10-13 07:10:45,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:52,808 INFO L124 PetriNetUnfolderBase]: 49203/68868 cut-off events. [2024-10-13 07:10:52,809 INFO L125 PetriNetUnfolderBase]: For 122809/123453 co-relation queries the response was YES. [2024-10-13 07:10:53,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199803 conditions, 68868 events. 49203/68868 cut-off events. For 122809/123453 co-relation queries the response was YES. Maximal size of possible extension queue 2568. Compared 482958 event pairs, 2356 based on Foata normal form. 872/69481 useless extension candidates. Maximal degree in co-relation 178341. Up to 22292 conditions per place. [2024-10-13 07:10:53,554 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 280 selfloop transitions, 33 changer transitions 4/331 dead transitions. [2024-10-13 07:10:53,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 331 transitions, 2644 flow [2024-10-13 07:10:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 07:10:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 07:10:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 314 transitions. [2024-10-13 07:10:53,557 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.628 [2024-10-13 07:10:53,557 INFO L175 Difference]: Start difference. First operand has 94 places, 135 transitions, 962 flow. Second operand 10 states and 314 transitions. [2024-10-13 07:10:53,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 331 transitions, 2644 flow [2024-10-13 07:10:54,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 331 transitions, 2544 flow, removed 49 selfloop flow, removed 1 redundant places. [2024-10-13 07:10:54,264 INFO L231 Difference]: Finished difference. Result has 106 places, 148 transitions, 1130 flow [2024-10-13 07:10:54,265 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1130, PETRI_PLACES=106, PETRI_TRANSITIONS=148} [2024-10-13 07:10:54,266 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 54 predicate places. [2024-10-13 07:10:54,266 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 148 transitions, 1130 flow [2024-10-13 07:10:54,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.666666666666668) internal successors, (340), 15 states have internal predecessors, (340), 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) [2024-10-13 07:10:54,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:54,267 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, 1, 1, 1, 1, 1] [2024-10-13 07:10:54,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 07:10:54,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-13 07:10:54,468 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 2 more)] === [2024-10-13 07:10:54,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:54,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1939865446, now seen corresponding path program 2 times [2024-10-13 07:10:54,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:54,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056742490] [2024-10-13 07:10:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:54,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:55,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:55,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056742490] [2024-10-13 07:10:55,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056742490] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:10:55,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816267967] [2024-10-13 07:10:55,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:10:55,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:55,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:55,896 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) [2024-10-13 07:10:55,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:10:56,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:10:56,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:10:56,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 07:10:56,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:10:56,336 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 7 [2024-10-13 07:10:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:10:56,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:10:56,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:10:56,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-13 07:10:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:10:56,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816267967] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:10:56,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:10:56,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 15 [2024-10-13 07:10:56,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877626315] [2024-10-13 07:10:56,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:10:56,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 07:10:56,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:56,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 07:10:56,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-10-13 07:10:56,859 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-13 07:10:56,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 148 transitions, 1130 flow. Second operand has 16 states, 16 states have (on average 24.875) internal successors, (398), 16 states have internal predecessors, (398), 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) [2024-10-13 07:10:56,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:56,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-13 07:10:56,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:08,023 INFO L124 PetriNetUnfolderBase]: 54929/83457 cut-off events. [2024-10-13 07:11:08,023 INFO L125 PetriNetUnfolderBase]: For 234352/237589 co-relation queries the response was YES. [2024-10-13 07:11:08,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266883 conditions, 83457 events. 54929/83457 cut-off events. For 234352/237589 co-relation queries the response was YES. Maximal size of possible extension queue 3670. Compared 697620 event pairs, 2516 based on Foata normal form. 2042/84012 useless extension candidates. Maximal degree in co-relation 247616. Up to 24928 conditions per place. [2024-10-13 07:11:08,983 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 243 selfloop transitions, 130 changer transitions 10/413 dead transitions. [2024-10-13 07:11:08,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 413 transitions, 3331 flow [2024-10-13 07:11:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 07:11:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-13 07:11:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 687 transitions. [2024-10-13 07:11:08,988 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6542857142857142 [2024-10-13 07:11:08,989 INFO L175 Difference]: Start difference. First operand has 106 places, 148 transitions, 1130 flow. Second operand 21 states and 687 transitions. [2024-10-13 07:11:08,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 413 transitions, 3331 flow [2024-10-13 07:11:09,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 413 transitions, 3219 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-10-13 07:11:09,663 INFO L231 Difference]: Finished difference. Result has 133 places, 228 transitions, 2270 flow [2024-10-13 07:11:09,664 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2270, PETRI_PLACES=133, PETRI_TRANSITIONS=228} [2024-10-13 07:11:09,664 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 81 predicate places. [2024-10-13 07:11:09,664 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 228 transitions, 2270 flow [2024-10-13 07:11:09,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 24.875) internal successors, (398), 16 states have internal predecessors, (398), 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) [2024-10-13 07:11:09,665 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:09,665 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:09,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:11:09,868 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 [2024-10-13 07:11:09,868 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 2 more)] === [2024-10-13 07:11:09,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash -459072634, now seen corresponding path program 1 times [2024-10-13 07:11:09,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:09,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690616531] [2024-10-13 07:11:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:09,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:11:10,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:10,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690616531] [2024-10-13 07:11:10,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690616531] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:10,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:10,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:11:10,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944023559] [2024-10-13 07:11:10,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:10,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:11:10,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:11:10,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:11:10,028 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-13 07:11:10,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 228 transitions, 2270 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-10-13 07:11:10,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:10,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-13 07:11:10,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand