./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/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.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:28:10,716 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:28:10,798 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:28:10,805 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:28:10,805 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:28:10,830 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:28:10,831 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:28:10,831 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:28:10,832 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:28:10,832 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:28:10,833 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:28:10,833 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:28:10,835 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:28:10,837 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:28:10,837 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:28:10,837 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:28:10,838 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:28:10,838 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:28:10,838 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:28:10,839 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:28:10,839 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:28:10,843 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:28:10,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:28:10,844 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:28:10,844 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:28:10,844 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:28:10,844 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:28:10,845 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:28:10,845 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:28:10,845 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:28:10,845 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:28:10,845 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:28:10,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:28:10,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:28:10,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:28:10,846 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:28:10,847 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:28:10,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:28:10,847 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:28:10,850 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:28:10,851 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:28:10,851 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:28:10,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f [2024-11-16 19:28:11,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:28:11,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:28:11,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:28:11,119 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:28:11,120 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:28:11,121 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-11-16 19:28:12,615 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:28:12,804 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:28:12,804 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-11-16 19:28:12,815 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68fec6d23/6b3ec5f4c85a4e7eba0d0aa62aad86d3/FLAG7e95bd022 [2024-11-16 19:28:12,833 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68fec6d23/6b3ec5f4c85a4e7eba0d0aa62aad86d3 [2024-11-16 19:28:12,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:28:12,839 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:28:12,841 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:28:12,841 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:28:12,846 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:28:12,847 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:28:12" (1/1) ... [2024-11-16 19:28:12,848 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f0403d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:12, skipping insertion in model container [2024-11-16 19:28:12,848 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:28:12" (1/1) ... [2024-11-16 19:28:12,878 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:28:13,149 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4345,4358] [2024-11-16 19:28:13,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:28:13,168 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:28:13,194 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4345,4358] [2024-11-16 19:28:13,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:28:13,217 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:28:13,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13 WrapperNode [2024-11-16 19:28:13,218 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:28:13,219 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:28:13,220 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:28:13,221 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:28:13,228 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (1/1) ... [2024-11-16 19:28:13,238 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (1/1) ... [2024-11-16 19:28:13,267 INFO L138 Inliner]: procedures = 25, calls = 59, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 305 [2024-11-16 19:28:13,267 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:28:13,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:28:13,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:28:13,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:28:13,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (1/1) ... [2024-11-16 19:28:13,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (1/1) ... [2024-11-16 19:28:13,283 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (1/1) ... [2024-11-16 19:28:13,305 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]. [2024-11-16 19:28:13,306 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (1/1) ... [2024-11-16 19:28:13,306 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (1/1) ... [2024-11-16 19:28:13,314 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (1/1) ... [2024-11-16 19:28:13,316 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (1/1) ... [2024-11-16 19:28:13,317 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (1/1) ... [2024-11-16 19:28:13,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (1/1) ... [2024-11-16 19:28:13,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:28:13,323 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:28:13,323 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:28:13,323 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:28:13,324 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (1/1) ... [2024-11-16 19:28:13,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:28:13,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:13,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 19:28:13,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 19:28:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:28:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:28:13,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:28:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:28:13,406 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:28:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-16 19:28:13,406 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-16 19:28:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-16 19:28:13,406 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-16 19:28:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:28:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:28:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:28:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:28:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-16 19:28:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-16 19:28:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 19:28:13,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:28:13,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:28:13,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:28:13,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:28:13,410 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:28:13,517 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:28:13,519 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:28:13,947 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:28:13,948 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:28:14,314 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:28:14,316 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:28:14,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:28:14 BoogieIcfgContainer [2024-11-16 19:28:14,317 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:28:14,321 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:28:14,321 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:28:14,325 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:28:14,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:28:12" (1/3) ... [2024-11-16 19:28:14,326 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4573de78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:28:14, skipping insertion in model container [2024-11-16 19:28:14,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:13" (2/3) ... [2024-11-16 19:28:14,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4573de78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:28:14, skipping insertion in model container [2024-11-16 19:28:14,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:28:14" (3/3) ... [2024-11-16 19:28:14,329 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2024-11-16 19:28:14,348 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:28:14,349 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:28:14,349 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:28:14,423 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-16 19:28:14,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 68 transitions, 164 flow [2024-11-16 19:28:14,498 INFO L124 PetriNetUnfolderBase]: 12/64 cut-off events. [2024-11-16 19:28:14,499 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:28:14,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 64 events. 12/64 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 126 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2024-11-16 19:28:14,504 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 68 transitions, 164 flow [2024-11-16 19:28:14,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 63 transitions, 150 flow [2024-11-16 19:28:14,521 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:28:14,529 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;@6536fd21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:28:14,530 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-16 19:28:14,552 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:28:14,553 INFO L124 PetriNetUnfolderBase]: 12/62 cut-off events. [2024-11-16 19:28:14,553 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:28:14,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:14,554 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] [2024-11-16 19:28:14,555 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)] === [2024-11-16 19:28:14,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:14,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1977573636, now seen corresponding path program 1 times [2024-11-16 19:28:14,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:14,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138619465] [2024-11-16 19:28:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:14,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:14,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:14,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138619465] [2024-11-16 19:28:14,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138619465] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:14,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:14,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:28:14,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081843585] [2024-11-16 19:28:14,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:14,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:28:14,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:14,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:28:14,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:28:14,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 68 [2024-11-16 19:28:14,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 40.0) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:14,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:14,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 68 [2024-11-16 19:28:14,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:15,703 INFO L124 PetriNetUnfolderBase]: 3789/5363 cut-off events. [2024-11-16 19:28:15,704 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2024-11-16 19:28:15,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10686 conditions, 5363 events. 3789/5363 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30355 event pairs, 2850 based on Foata normal form. 939/5711 useless extension candidates. Maximal degree in co-relation 9804. Up to 4955 conditions per place. [2024-11-16 19:28:15,752 INFO L140 encePairwiseOnDemand]: 62/68 looper letters, 36 selfloop transitions, 0 changer transitions 0/57 dead transitions. [2024-11-16 19:28:15,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 210 flow [2024-11-16 19:28:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:28:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:28:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 92 transitions. [2024-11-16 19:28:15,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-11-16 19:28:15,768 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 150 flow. Second operand 2 states and 92 transitions. [2024-11-16 19:28:15,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 210 flow [2024-11-16 19:28:15,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 194 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-16 19:28:15,792 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 122 flow [2024-11-16 19:28:15,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=122, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-11-16 19:28:15,798 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, -7 predicate places. [2024-11-16 19:28:15,798 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 122 flow [2024-11-16 19:28:15,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 40.0) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:15,799 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:15,799 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, 1] [2024-11-16 19:28:15,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:28:15,800 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)] === [2024-11-16 19:28:15,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:15,801 INFO L85 PathProgramCache]: Analyzing trace with hash -979446931, now seen corresponding path program 1 times [2024-11-16 19:28:15,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:15,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231487604] [2024-11-16 19:28:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:15,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:16,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:16,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231487604] [2024-11-16 19:28:16,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231487604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:16,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:16,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:28:16,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938577021] [2024-11-16 19:28:16,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:16,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:28:16,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:16,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:28:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:28:16,276 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 68 [2024-11-16 19:28:16,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:16,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:16,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 68 [2024-11-16 19:28:16,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:17,305 INFO L124 PetriNetUnfolderBase]: 5895/8634 cut-off events. [2024-11-16 19:28:17,306 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:28:17,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16542 conditions, 8634 events. 5895/8634 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52584 event pairs, 359 based on Foata normal form. 212/8733 useless extension candidates. Maximal degree in co-relation 16539. Up to 5161 conditions per place. [2024-11-16 19:28:17,358 INFO L140 encePairwiseOnDemand]: 63/68 looper letters, 75 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2024-11-16 19:28:17,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 99 transitions, 370 flow [2024-11-16 19:28:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:28:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:28:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 200 transitions. [2024-11-16 19:28:17,361 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-11-16 19:28:17,361 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 122 flow. Second operand 5 states and 200 transitions. [2024-11-16 19:28:17,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 99 transitions, 370 flow [2024-11-16 19:28:17,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:28:17,366 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 138 flow [2024-11-16 19:28:17,367 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-11-16 19:28:17,367 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, -2 predicate places. [2024-11-16 19:28:17,368 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 138 flow [2024-11-16 19:28:17,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:17,368 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:17,369 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:17,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:28:17,369 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)] === [2024-11-16 19:28:17,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:17,370 INFO L85 PathProgramCache]: Analyzing trace with hash 833110171, now seen corresponding path program 1 times [2024-11-16 19:28:17,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:17,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847150564] [2024-11-16 19:28:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:17,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:28:17,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:17,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847150564] [2024-11-16 19:28:17,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847150564] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:17,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:17,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:28:17,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804345824] [2024-11-16 19:28:17,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:17,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:28:17,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:17,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:28:17,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:28:17,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 68 [2024-11-16 19:28:17,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:17,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:17,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 68 [2024-11-16 19:28:17,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:19,091 INFO L124 PetriNetUnfolderBase]: 8967/13244 cut-off events. [2024-11-16 19:28:19,092 INFO L125 PetriNetUnfolderBase]: For 1728/1728 co-relation queries the response was YES. [2024-11-16 19:28:19,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26827 conditions, 13244 events. 8967/13244 cut-off events. For 1728/1728 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 87223 event pairs, 995 based on Foata normal form. 374/13489 useless extension candidates. Maximal degree in co-relation 26822. Up to 8083 conditions per place. [2024-11-16 19:28:19,179 INFO L140 encePairwiseOnDemand]: 61/68 looper letters, 89 selfloop transitions, 7 changer transitions 0/116 dead transitions. [2024-11-16 19:28:19,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 116 transitions, 473 flow [2024-11-16 19:28:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:28:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:28:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 240 transitions. [2024-11-16 19:28:19,182 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-11-16 19:28:19,182 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 138 flow. Second operand 6 states and 240 transitions. [2024-11-16 19:28:19,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 116 transitions, 473 flow [2024-11-16 19:28:19,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 116 transitions, 461 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-16 19:28:19,186 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 183 flow [2024-11-16 19:28:19,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-11-16 19:28:19,187 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2024-11-16 19:28:19,187 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 183 flow [2024-11-16 19:28:19,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:19,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:19,187 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:19,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:28:19,188 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)] === [2024-11-16 19:28:19,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:19,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1093564109, now seen corresponding path program 2 times [2024-11-16 19:28:19,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:19,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098139277] [2024-11-16 19:28:19,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:19,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:19,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:19,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098139277] [2024-11-16 19:28:19,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098139277] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:19,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:19,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:28:19,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013310192] [2024-11-16 19:28:19,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:19,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:28:19,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:19,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:28:19,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:28:19,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 68 [2024-11-16 19:28:19,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:19,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:19,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 68 [2024-11-16 19:28:19,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:20,858 INFO L124 PetriNetUnfolderBase]: 8273/12608 cut-off events. [2024-11-16 19:28:20,859 INFO L125 PetriNetUnfolderBase]: For 5486/5534 co-relation queries the response was YES. [2024-11-16 19:28:20,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29146 conditions, 12608 events. 8273/12608 cut-off events. For 5486/5534 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 86361 event pairs, 5937 based on Foata normal form. 190/12271 useless extension candidates. Maximal degree in co-relation 29138. Up to 10099 conditions per place. [2024-11-16 19:28:20,957 INFO L140 encePairwiseOnDemand]: 62/68 looper letters, 43 selfloop transitions, 2 changer transitions 24/88 dead transitions. [2024-11-16 19:28:20,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 384 flow [2024-11-16 19:28:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:28:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:28:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-16 19:28:20,960 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2024-11-16 19:28:20,960 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 183 flow. Second operand 5 states and 180 transitions. [2024-11-16 19:28:20,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 384 flow [2024-11-16 19:28:20,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 378 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-16 19:28:20,992 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 196 flow [2024-11-16 19:28:20,993 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2024-11-16 19:28:20,994 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 8 predicate places. [2024-11-16 19:28:20,994 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 196 flow [2024-11-16 19:28:20,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:20,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:20,995 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:20,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:28:20,996 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)] === [2024-11-16 19:28:20,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:20,998 INFO L85 PathProgramCache]: Analyzing trace with hash 314725247, now seen corresponding path program 1 times [2024-11-16 19:28:20,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:20,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155750890] [2024-11-16 19:28:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:20,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:28:21,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:21,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155750890] [2024-11-16 19:28:21,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155750890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:21,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677902651] [2024-11-16 19:28:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:21,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:21,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:21,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:28:21,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:28:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:21,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 19:28:21,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:28:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:28:21,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:28:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:28:21,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677902651] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:21,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:28:21,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 15 [2024-11-16 19:28:21,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550105461] [2024-11-16 19:28:21,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:21,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 19:28:21,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:21,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 19:28:21,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-16 19:28:21,922 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 68 [2024-11-16 19:28:21,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:21,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:21,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 68 [2024-11-16 19:28:21,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:24,957 INFO L124 PetriNetUnfolderBase]: 26207/35404 cut-off events. [2024-11-16 19:28:24,957 INFO L125 PetriNetUnfolderBase]: For 12253/12253 co-relation queries the response was YES. [2024-11-16 19:28:25,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82436 conditions, 35404 events. 26207/35404 cut-off events. For 12253/12253 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 224531 event pairs, 4204 based on Foata normal form. 374/34854 useless extension candidates. Maximal degree in co-relation 82425. Up to 10516 conditions per place. [2024-11-16 19:28:25,298 INFO L140 encePairwiseOnDemand]: 61/68 looper letters, 117 selfloop transitions, 11 changer transitions 0/145 dead transitions. [2024-11-16 19:28:25,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 145 transitions, 691 flow [2024-11-16 19:28:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:28:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:28:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 242 transitions. [2024-11-16 19:28:25,300 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5931372549019608 [2024-11-16 19:28:25,300 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 196 flow. Second operand 6 states and 242 transitions. [2024-11-16 19:28:25,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 145 transitions, 691 flow [2024-11-16 19:28:25,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 145 transitions, 687 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-16 19:28:25,325 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 291 flow [2024-11-16 19:28:25,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-11-16 19:28:25,327 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 13 predicate places. [2024-11-16 19:28:25,328 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 291 flow [2024-11-16 19:28:25,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:25,328 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:25,329 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:25,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:28:25,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:25,530 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)] === [2024-11-16 19:28:25,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:25,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2142348995, now seen corresponding path program 1 times [2024-11-16 19:28:25,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:25,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883648527] [2024-11-16 19:28:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:25,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:26,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:26,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883648527] [2024-11-16 19:28:26,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883648527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:26,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687183800] [2024-11-16 19:28:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:26,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:26,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:26,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:28:26,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:28:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:26,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-16 19:28:26,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:28:26,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-16 19:28:27,373 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 [2024-11-16 19:28:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:27,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:28:28,261 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 [2024-11-16 19:28:28,268 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 [2024-11-16 19:28:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:28,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687183800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:28:28,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:28:28,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2024-11-16 19:28:28,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200931256] [2024-11-16 19:28:28,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:28:28,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 19:28:28,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:28,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 19:28:28,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-16 19:28:28,362 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 68 [2024-11-16 19:28:28,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 291 flow. Second operand has 20 states, 20 states have (on average 27.3) internal successors, (546), 20 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:28,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:28,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 68 [2024-11-16 19:28:28,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:37,519 INFO L124 PetriNetUnfolderBase]: 58276/90555 cut-off events. [2024-11-16 19:28:37,520 INFO L125 PetriNetUnfolderBase]: For 85032/87359 co-relation queries the response was YES. [2024-11-16 19:28:37,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230980 conditions, 90555 events. 58276/90555 cut-off events. For 85032/87359 co-relation queries the response was YES. Maximal size of possible extension queue 3552. Compared 784347 event pairs, 4088 based on Foata normal form. 1391/90359 useless extension candidates. Maximal degree in co-relation 230966. Up to 22413 conditions per place. [2024-11-16 19:28:38,281 INFO L140 encePairwiseOnDemand]: 58/68 looper letters, 335 selfloop transitions, 55 changer transitions 3/414 dead transitions. [2024-11-16 19:28:38,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 414 transitions, 2340 flow [2024-11-16 19:28:38,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-16 19:28:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-16 19:28:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 872 transitions. [2024-11-16 19:28:38,284 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5575447570332481 [2024-11-16 19:28:38,284 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 291 flow. Second operand 23 states and 872 transitions. [2024-11-16 19:28:38,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 414 transitions, 2340 flow [2024-11-16 19:28:38,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 414 transitions, 2318 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-16 19:28:38,670 INFO L231 Difference]: Finished difference. Result has 107 places, 132 transitions, 831 flow [2024-11-16 19:28:38,671 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=831, PETRI_PLACES=107, PETRI_TRANSITIONS=132} [2024-11-16 19:28:38,671 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 43 predicate places. [2024-11-16 19:28:38,672 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 132 transitions, 831 flow [2024-11-16 19:28:38,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 27.3) internal successors, (546), 20 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:38,672 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:38,672 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2024-11-16 19:28:38,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 19:28:38,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-16 19:28:38,874 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)] === [2024-11-16 19:28:38,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:38,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1721604887, now seen corresponding path program 1 times [2024-11-16 19:28:38,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:38,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933950412] [2024-11-16 19:28:38,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:38,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:40,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:40,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933950412] [2024-11-16 19:28:40,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933950412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:40,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479555479] [2024-11-16 19:28:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:40,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:40,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:40,158 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:28:40,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:28:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:40,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 19:28:40,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:28:40,589 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 [2024-11-16 19:28:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:28:40,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:28:40,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:28:40,736 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 [2024-11-16 19:28:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:28:41,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479555479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:28:41,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:28:41,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2024-11-16 19:28:41,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297350244] [2024-11-16 19:28:41,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:28:41,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 19:28:41,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:41,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 19:28:41,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-16 19:28:41,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 68 [2024-11-16 19:28:41,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 132 transitions, 831 flow. Second operand has 16 states, 16 states have (on average 28.0) internal successors, (448), 16 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:41,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:41,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 68 [2024-11-16 19:28:41,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:59,185 INFO L124 PetriNetUnfolderBase]: 107001/168257 cut-off events. [2024-11-16 19:28:59,185 INFO L125 PetriNetUnfolderBase]: For 282719/287167 co-relation queries the response was YES. [2024-11-16 19:29:00,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467341 conditions, 168257 events. 107001/168257 cut-off events. For 282719/287167 co-relation queries the response was YES. Maximal size of possible extension queue 6521. Compared 1587744 event pairs, 8374 based on Foata normal form. 1505/167327 useless extension candidates. Maximal degree in co-relation 467318. Up to 50651 conditions per place. [2024-11-16 19:29:01,290 INFO L140 encePairwiseOnDemand]: 59/68 looper letters, 274 selfloop transitions, 102 changer transitions 2/399 dead transitions. [2024-11-16 19:29:01,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 399 transitions, 2808 flow [2024-11-16 19:29:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 19:29:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-16 19:29:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 673 transitions. [2024-11-16 19:29:01,293 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5498366013071896 [2024-11-16 19:29:01,294 INFO L175 Difference]: Start difference. First operand has 107 places, 132 transitions, 831 flow. Second operand 18 states and 673 transitions. [2024-11-16 19:29:01,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 399 transitions, 2808 flow [2024-11-16 19:29:05,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 399 transitions, 2730 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-11-16 19:29:05,864 INFO L231 Difference]: Finished difference. Result has 130 places, 197 transitions, 1668 flow [2024-11-16 19:29:05,864 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1668, PETRI_PLACES=130, PETRI_TRANSITIONS=197} [2024-11-16 19:29:05,865 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 66 predicate places. [2024-11-16 19:29:05,865 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 197 transitions, 1668 flow [2024-11-16 19:29:05,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 28.0) internal successors, (448), 16 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:05,866 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:05,866 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2024-11-16 19:29:05,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 19:29:06,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:06,069 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)] === [2024-11-16 19:29:06,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:06,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1491856747, now seen corresponding path program 1 times [2024-11-16 19:29:06,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:06,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226399414] [2024-11-16 19:29:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:06,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:29:06,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:06,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226399414] [2024-11-16 19:29:06,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226399414] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:06,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:06,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:29:06,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244985795] [2024-11-16 19:29:06,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:06,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:29:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:06,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:29:06,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:29:06,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 68 [2024-11-16 19:29:06,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 197 transitions, 1668 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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) [2024-11-16 19:29:06,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:06,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 68 [2024-11-16 19:29:06,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand