./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 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/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-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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-dev-84cfde4 [2024-10-11 14:30:10,396 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:30:10,477 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:30:10,480 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:30:10,480 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:30:10,493 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:30:10,494 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:30:10,494 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:30:10,494 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:30:10,494 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:30:10,495 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:30:10,495 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:30:10,495 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:30:10,495 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:30:10,496 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:30:10,496 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:30:10,496 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:30:10,496 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:30:10,497 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:30:10,497 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:30:10,499 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:30:10,500 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:30:10,502 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:30:10,502 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:30:10,502 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:30:10,503 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:30:10,503 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:30:10,503 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:30:10,503 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:30:10,503 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:30:10,504 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:30:10,504 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:30:10,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:30:10,504 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:30:10,504 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:30:10,504 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:30:10,505 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:30:10,505 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:30:10,505 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:30:10,505 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:30:10,506 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:30:10,506 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:30:10,506 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f [2024-10-11 14:30:10,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:30:10,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:30:10,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:30:10,713 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:30:10,714 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:30:10,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-10-11 14:30:12,079 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:30:12,241 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:30:12,241 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-10-11 14:30:12,249 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/5b5064e45/4edb4c2caa874e099d8ed80e006a972d/FLAG322326b8f [2024-10-11 14:30:12,267 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/5b5064e45/4edb4c2caa874e099d8ed80e006a972d [2024-10-11 14:30:12,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:30:12,272 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:30:12,274 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:30:12,274 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:30:12,279 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:30:12,279 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,280 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@224af07f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12, skipping insertion in model container [2024-10-11 14:30:12,281 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,308 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:30:12,493 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] [2024-10-11 14:30:12,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:30:12,512 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:30:12,540 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] [2024-10-11 14:30:12,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:30:12,556 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:30:12,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12 WrapperNode [2024-10-11 14:30:12,557 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:30:12,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:30:12,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:30:12,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:30:12,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,572 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,602 INFO L138 Inliner]: procedures = 25, calls = 59, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 311 [2024-10-11 14:30:12,606 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:30:12,607 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:30:12,607 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:30:12,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:30:12,619 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,623 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,635 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]. [2024-10-11 14:30:12,636 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,636 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,642 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,645 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,647 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,648 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,651 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:30:12,651 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:30:12,652 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:30:12,652 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:30:12,652 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (1/1) ... [2024-10-11 14:30:12,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:30:12,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:12,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:30:12,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:30:12,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:30:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:30:12,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:30:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:30:12,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:30:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:30:12,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:30:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-11 14:30:12,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-11 14:30:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:30:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:30:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:30:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:30:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:30:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:30:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:30:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:30:12,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:30:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:30:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:30:12,761 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:30:12,904 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:30:12,906 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:30:13,220 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:30:13,220 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:30:13,525 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:30:13,526 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-11 14:30:13,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:13 BoogieIcfgContainer [2024-10-11 14:30:13,527 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:30:13,528 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:30:13,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:30:13,532 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:30:13,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:30:12" (1/3) ... [2024-10-11 14:30:13,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45135775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:13, skipping insertion in model container [2024-10-11 14:30:13,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:12" (2/3) ... [2024-10-11 14:30:13,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45135775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:13, skipping insertion in model container [2024-10-11 14:30:13,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:13" (3/3) ... [2024-10-11 14:30:13,535 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2024-10-11 14:30:13,552 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:30:13,552 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:30:13,552 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:30:13,605 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-11 14:30:13,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 50 transitions, 128 flow [2024-10-11 14:30:13,669 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2024-10-11 14:30:13,669 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:30:13,672 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. [2024-10-11 14:30:13,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 50 transitions, 128 flow [2024-10-11 14:30:13,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 45 transitions, 114 flow [2024-10-11 14:30:13,686 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:30:13,693 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;@577e01bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:30:13,694 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 14:30:13,708 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:30:13,708 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2024-10-11 14:30:13,709 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:30:13,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:13,709 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] [2024-10-11 14:30:13,710 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)] === [2024-10-11 14:30:13,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:13,714 INFO L85 PathProgramCache]: Analyzing trace with hash 141731549, now seen corresponding path program 1 times [2024-10-11 14:30:13,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:13,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017702911] [2024-10-11 14:30:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:13,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:14,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:14,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017702911] [2024-10-11 14:30:14,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017702911] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:14,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:30:14,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:30:14,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652666457] [2024-10-11 14:30:14,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:14,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:30:14,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:14,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:30:14,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:30:14,382 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-10-11 14:30:14,385 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) [2024-10-11 14:30:14,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:14,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-10-11 14:30:14,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:15,118 INFO L124 PetriNetUnfolderBase]: 3597/5250 cut-off events. [2024-10-11 14:30:15,118 INFO L125 PetriNetUnfolderBase]: For 401/401 co-relation queries the response was YES. [2024-10-11 14:30:15,133 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. [2024-10-11 14:30:15,158 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 70 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2024-10-11 14:30:15,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 92 transitions, 395 flow [2024-10-11 14:30:15,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:30:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:30:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-10-11 14:30:15,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6433333333333333 [2024-10-11 14:30:15,174 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 114 flow. Second operand 6 states and 193 transitions. [2024-10-11 14:30:15,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 92 transitions, 395 flow [2024-10-11 14:30:15,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 92 transitions, 357 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-11 14:30:15,187 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 145 flow [2024-10-11 14:30:15,189 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} [2024-10-11 14:30:15,192 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-10-11 14:30:15,192 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 145 flow [2024-10-11 14:30:15,192 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) [2024-10-11 14:30:15,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:15,193 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] [2024-10-11 14:30:15,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:30:15,193 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)] === [2024-10-11 14:30:15,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:15,195 INFO L85 PathProgramCache]: Analyzing trace with hash 165154878, now seen corresponding path program 1 times [2024-10-11 14:30:15,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:15,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62382876] [2024-10-11 14:30:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:15,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:15,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:15,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62382876] [2024-10-11 14:30:15,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62382876] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:15,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:30:15,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:30:15,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039455980] [2024-10-11 14:30:15,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:15,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:30:15,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:30:15,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:30:15,312 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-11 14:30:15,313 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) [2024-10-11 14:30:15,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:15,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-11 14:30:15,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:15,675 INFO L124 PetriNetUnfolderBase]: 2354/3510 cut-off events. [2024-10-11 14:30:15,675 INFO L125 PetriNetUnfolderBase]: For 1622/1968 co-relation queries the response was YES. [2024-10-11 14:30:15,681 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. [2024-10-11 14:30:15,693 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 43 selfloop transitions, 2 changer transitions 2/66 dead transitions. [2024-10-11 14:30:15,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 276 flow [2024-10-11 14:30:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:30:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:30:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-10-11 14:30:15,697 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.72 [2024-10-11 14:30:15,697 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 145 flow. Second operand 3 states and 108 transitions. [2024-10-11 14:30:15,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 276 flow [2024-10-11 14:30:15,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 66 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:30:15,701 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 152 flow [2024-10-11 14:30:15,701 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} [2024-10-11 14:30:15,702 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-10-11 14:30:15,702 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 152 flow [2024-10-11 14:30:15,702 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) [2024-10-11 14:30:15,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:15,703 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] [2024-10-11 14:30:15,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:30:15,703 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)] === [2024-10-11 14:30:15,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:15,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2013548560, now seen corresponding path program 1 times [2024-10-11 14:30:15,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:15,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529504174] [2024-10-11 14:30:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:15,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:15,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:15,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529504174] [2024-10-11 14:30:15,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529504174] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:15,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:30:15,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:30:15,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209295327] [2024-10-11 14:30:15,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:15,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:30:15,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:15,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:30:15,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:30:15,955 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-10-11 14:30:15,956 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) [2024-10-11 14:30:15,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:15,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-10-11 14:30:15,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:16,961 INFO L124 PetriNetUnfolderBase]: 6731/9910 cut-off events. [2024-10-11 14:30:16,961 INFO L125 PetriNetUnfolderBase]: For 3774/3774 co-relation queries the response was YES. [2024-10-11 14:30:16,978 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. [2024-10-11 14:30:17,014 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 80 selfloop transitions, 14 changer transitions 0/109 dead transitions. [2024-10-11 14:30:17,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 109 transitions, 521 flow [2024-10-11 14:30:17,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:30:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:30:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-10-11 14:30:17,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-10-11 14:30:17,017 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 152 flow. Second operand 6 states and 198 transitions. [2024-10-11 14:30:17,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 109 transitions, 521 flow [2024-10-11 14:30:17,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 109 transitions, 519 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:30:17,023 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 269 flow [2024-10-11 14:30:17,023 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} [2024-10-11 14:30:17,024 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-10-11 14:30:17,024 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 269 flow [2024-10-11 14:30:17,024 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) [2024-10-11 14:30:17,024 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:17,024 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] [2024-10-11 14:30:17,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:30:17,025 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)] === [2024-10-11 14:30:17,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:17,025 INFO L85 PathProgramCache]: Analyzing trace with hash -838092421, now seen corresponding path program 1 times [2024-10-11 14:30:17,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:17,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145293668] [2024-10-11 14:30:17,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:17,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:17,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:17,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145293668] [2024-10-11 14:30:17,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145293668] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:17,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:30:17,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:30:17,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275939024] [2024-10-11 14:30:17,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:17,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:30:17,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:17,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:30:17,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:30:17,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-11 14:30:17,117 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) [2024-10-11 14:30:17,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:17,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-11 14:30:17,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:18,040 INFO L124 PetriNetUnfolderBase]: 5939/9170 cut-off events. [2024-10-11 14:30:18,041 INFO L125 PetriNetUnfolderBase]: For 14442/15347 co-relation queries the response was YES. [2024-10-11 14:30:18,068 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. [2024-10-11 14:30:18,113 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 36 selfloop transitions, 2 changer transitions 19/81 dead transitions. [2024-10-11 14:30:18,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 81 transitions, 436 flow [2024-10-11 14:30:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:30:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:30:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-10-11 14:30:18,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-10-11 14:30:18,118 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 269 flow. Second operand 5 states and 154 transitions. [2024-10-11 14:30:18,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 81 transitions, 436 flow [2024-10-11 14:30:18,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:30:18,129 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 282 flow [2024-10-11 14:30:18,129 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} [2024-10-11 14:30:18,130 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2024-10-11 14:30:18,130 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 282 flow [2024-10-11 14:30:18,130 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) [2024-10-11 14:30:18,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:18,131 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] [2024-10-11 14:30:18,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:30:18,131 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)] === [2024-10-11 14:30:18,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:18,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1608930405, now seen corresponding path program 1 times [2024-10-11 14:30:18,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:18,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628437060] [2024-10-11 14:30:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:18,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:18,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:18,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628437060] [2024-10-11 14:30:18,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628437060] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:18,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742898434] [2024-10-11 14:30:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:18,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:18,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:18,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:30:18,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:30:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:19,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:30:19,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:19,080 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 [2024-10-11 14:30:19,343 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 [2024-10-11 14:30:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:19,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:30:19,791 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 [2024-10-11 14:30:19,798 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 [2024-10-11 14:30:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:19,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742898434] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:30:19,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:30:19,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-10-11 14:30:19,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513005371] [2024-10-11 14:30:19,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:30:19,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:30:19,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:30:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:30:19,922 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-11 14:30:19,922 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) [2024-10-11 14:30:19,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:19,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-11 14:30:19,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:24,722 INFO L124 PetriNetUnfolderBase]: 21478/32722 cut-off events. [2024-10-11 14:30:24,726 INFO L125 PetriNetUnfolderBase]: For 44302/46701 co-relation queries the response was YES. [2024-10-11 14:30:24,852 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. [2024-10-11 14:30:24,990 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 276 selfloop transitions, 72 changer transitions 12/384 dead transitions. [2024-10-11 14:30:24,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 384 transitions, 2188 flow [2024-10-11 14:30:24,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 14:30:24,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-11 14:30:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 838 transitions. [2024-10-11 14:30:24,995 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6983333333333334 [2024-10-11 14:30:24,995 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 282 flow. Second operand 24 states and 838 transitions. [2024-10-11 14:30:24,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 384 transitions, 2188 flow [2024-10-11 14:30:25,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 384 transitions, 2162 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-10-11 14:30:25,053 INFO L231 Difference]: Finished difference. Result has 94 places, 135 transitions, 962 flow [2024-10-11 14:30:25,054 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} [2024-10-11 14:30:25,056 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2024-10-11 14:30:25,056 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 135 transitions, 962 flow [2024-10-11 14:30:25,056 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) [2024-10-11 14:30:25,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:25,056 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] [2024-10-11 14:30:25,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:30:25,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:25,257 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)] === [2024-10-11 14:30:25,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:25,258 INFO L85 PathProgramCache]: Analyzing trace with hash 659510984, now seen corresponding path program 1 times [2024-10-11 14:30:25,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:25,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221369563] [2024-10-11 14:30:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:25,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:30:25,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:25,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221369563] [2024-10-11 14:30:25,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221369563] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:25,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159862524] [2024-10-11 14:30:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:25,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:25,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:25,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:30:25,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:30:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:25,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:30:25,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:30:25,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:30:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:30:25,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159862524] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:30:25,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:30:25,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-10-11 14:30:25,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931344098] [2024-10-11 14:30:25,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:30:25,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:30:25,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:25,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:30:25,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:30:25,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-10-11 14:30:25,851 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) [2024-10-11 14:30:25,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:25,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-10-11 14:30:25,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:32,876 INFO L124 PetriNetUnfolderBase]: 49203/68868 cut-off events. [2024-10-11 14:30:32,876 INFO L125 PetriNetUnfolderBase]: For 122809/123453 co-relation queries the response was YES. [2024-10-11 14:30:33,299 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. [2024-10-11 14:30:33,609 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 280 selfloop transitions, 33 changer transitions 4/331 dead transitions. [2024-10-11 14:30:33,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 331 transitions, 2644 flow [2024-10-11 14:30:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:30:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:30:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 314 transitions. [2024-10-11 14:30:33,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.628 [2024-10-11 14:30:33,612 INFO L175 Difference]: Start difference. First operand has 94 places, 135 transitions, 962 flow. Second operand 10 states and 314 transitions. [2024-10-11 14:30:33,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 331 transitions, 2644 flow [2024-10-11 14:30:34,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 331 transitions, 2544 flow, removed 49 selfloop flow, removed 1 redundant places. [2024-10-11 14:30:34,225 INFO L231 Difference]: Finished difference. Result has 106 places, 148 transitions, 1130 flow [2024-10-11 14:30:34,225 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} [2024-10-11 14:30:34,226 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 54 predicate places. [2024-10-11 14:30:34,226 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 148 transitions, 1130 flow [2024-10-11 14:30:34,226 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) [2024-10-11 14:30:34,226 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:34,227 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] [2024-10-11 14:30:34,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:30:34,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:34,434 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)] === [2024-10-11 14:30:34,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:34,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1939865446, now seen corresponding path program 2 times [2024-10-11 14:30:34,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:34,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79733880] [2024-10-11 14:30:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:34,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:35,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:35,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79733880] [2024-10-11 14:30:35,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79733880] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:35,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028304477] [2024-10-11 14:30:35,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:30:35,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:35,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:35,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:30:35,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:30:35,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:30:35,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:30:35,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 14:30:35,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:35,535 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 [2024-10-11 14:30:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:30:35,542 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:30:35,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:30:35,629 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 [2024-10-11 14:30:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:30:35,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028304477] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:30:35,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:30:35,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 15 [2024-10-11 14:30:35,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201097466] [2024-10-11 14:30:35,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:30:35,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 14:30:35,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:35,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 14:30:35,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:30:35,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-11 14:30:35,854 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) [2024-10-11 14:30:35,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:35,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-11 14:30:35,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:46,354 INFO L124 PetriNetUnfolderBase]: 54929/83457 cut-off events. [2024-10-11 14:30:46,355 INFO L125 PetriNetUnfolderBase]: For 234352/237589 co-relation queries the response was YES. [2024-10-11 14:30:46,920 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. [2024-10-11 14:30:47,237 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 243 selfloop transitions, 130 changer transitions 10/413 dead transitions. [2024-10-11 14:30:47,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 413 transitions, 3331 flow [2024-10-11 14:30:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:30:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:30:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 687 transitions. [2024-10-11 14:30:47,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6542857142857142 [2024-10-11 14:30:47,245 INFO L175 Difference]: Start difference. First operand has 106 places, 148 transitions, 1130 flow. Second operand 21 states and 687 transitions. [2024-10-11 14:30:47,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 413 transitions, 3331 flow [2024-10-11 14:30:47,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 413 transitions, 3219 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-10-11 14:30:47,932 INFO L231 Difference]: Finished difference. Result has 133 places, 228 transitions, 2270 flow [2024-10-11 14:30:47,933 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} [2024-10-11 14:30:47,933 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 81 predicate places. [2024-10-11 14:30:47,933 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 228 transitions, 2270 flow [2024-10-11 14:30:47,934 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) [2024-10-11 14:30:47,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:47,934 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] [2024-10-11 14:30:47,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:30:48,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:48,135 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)] === [2024-10-11 14:30:48,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash -459072634, now seen corresponding path program 1 times [2024-10-11 14:30:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:48,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570331546] [2024-10-11 14:30:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:48,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:30:48,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:48,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570331546] [2024-10-11 14:30:48,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570331546] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:48,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:30:48,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:30:48,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767891735] [2024-10-11 14:30:48,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:48,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:30:48,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:48,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:30:48,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:30:48,362 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-11 14:30:48,362 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) [2024-10-11 14:30:48,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:48,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-11 14:30:48,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand