./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/bigshot_s2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/bigshot_s2.i -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 fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:16:40,338 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:16:40,423 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:16:40,429 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:16:40,429 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:16:40,463 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:16:40,465 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:16:40,465 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:16:40,466 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:16:40,472 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:16:40,472 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:16:40,472 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:16:40,473 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:16:40,473 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:16:40,473 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:16:40,473 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:16:40,474 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:16:40,474 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:16:40,474 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:16:40,474 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:16:40,474 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:16:40,475 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:16:40,475 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:16:40,475 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:16:40,475 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:16:40,475 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:16:40,476 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:16:40,476 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:16:40,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:16:40,477 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:16:40,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:16:40,478 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:16:40,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:16:40,478 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:16:40,478 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:16:40,478 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:16:40,478 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:16:40,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:16:40,479 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:16:40,479 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:16:40,479 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:16:40,479 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:16:40,480 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:16:40,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb [2024-06-27 16:16:40,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:16:40,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:16:40,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:16:40,713 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:16:40,713 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:16:40,714 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s2.i [2024-06-27 16:16:42,009 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:16:42,203 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:16:42,203 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i [2024-06-27 16:16:42,233 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/513becae9/3e9885470f77405ea59967d3984ebfdc/FLAG1c593b884 [2024-06-27 16:16:42,243 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/513becae9/3e9885470f77405ea59967d3984ebfdc [2024-06-27 16:16:42,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:16:42,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:16:42,248 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:16:42,248 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:16:42,253 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:16:42,254 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f1f006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42, skipping insertion in model container [2024-06-27 16:16:42,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,296 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:16:42,656 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i[55203,55216] [2024-06-27 16:16:42,677 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:16:42,684 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:16:42,719 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i[55203,55216] [2024-06-27 16:16:42,730 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:16:42,796 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:16:42,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42 WrapperNode [2024-06-27 16:16:42,798 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:16:42,799 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:16:42,799 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:16:42,799 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:16:42,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,829 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,853 INFO L138 Inliner]: procedures = 322, calls = 23, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2024-06-27 16:16:42,853 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:16:42,854 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:16:42,854 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:16:42,855 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:16:42,863 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,885 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,904 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-06-27 16:16:42,904 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,904 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,918 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,920 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,925 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,930 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,931 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:16:42,935 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:16:42,935 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:16:42,935 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:16:42,936 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (1/1) ... [2024-06-27 16:16:42,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:16:42,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:16:42,968 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) [2024-06-27 16:16:42,995 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 [2024-06-27 16:16:43,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-06-27 16:16:43,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-06-27 16:16:43,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-06-27 16:16:43,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:16:43,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:16:43,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 16:16:43,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:16:43,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:16:43,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:16:43,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:16:43,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:16:43,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:16:43,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:16:43,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:16:43,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 16:16:43,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:16:43,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:16:43,034 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:16:43,167 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:16:43,168 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:16:43,266 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:16:43,266 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:16:43,363 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:16:43,363 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-06-27 16:16:43,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:16:43 BoogieIcfgContainer [2024-06-27 16:16:43,364 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:16:43,366 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:16:43,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:16:43,369 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:16:43,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:16:42" (1/3) ... [2024-06-27 16:16:43,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a572bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:16:43, skipping insertion in model container [2024-06-27 16:16:43,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:16:42" (2/3) ... [2024-06-27 16:16:43,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a572bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:16:43, skipping insertion in model container [2024-06-27 16:16:43,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:16:43" (3/3) ... [2024-06-27 16:16:43,371 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2024-06-27 16:16:43,377 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:16:43,384 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:16:43,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:16:43,385 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:16:43,433 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:16:43,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 66 flow [2024-06-27 16:16:43,473 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-06-27 16:16:43,473 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:16:43,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-06-27 16:16:43,475 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 66 flow [2024-06-27 16:16:43,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2024-06-27 16:16:43,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:16:43,497 INFO L357 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, mHoare=true, 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;@423d0425, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:16:43,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:16:43,517 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:16:43,518 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-06-27 16:16:43,518 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:16:43,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:16:43,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:16:43,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:16:43,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:16:43,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1735421001, now seen corresponding path program 1 times [2024-06-27 16:16:43,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:16:43,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560720445] [2024-06-27 16:16:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:16:43,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:16:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:16:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:43,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:16:43,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560720445] [2024-06-27 16:16:43,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560720445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:16:43,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:16:43,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:16:43,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393928999] [2024-06-27 16:16:43,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:16:43,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:16:43,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:16:43,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:16:43,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:16:43,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 16:16:43,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:16:43,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:16:43,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 16:16:43,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:16:43,898 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2024-06-27 16:16:43,898 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:16:43,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 31 events. 7/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 4 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 46. Up to 23 conditions per place. [2024-06-27 16:16:43,899 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 15 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2024-06-27 16:16:43,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 20 transitions, 84 flow [2024-06-27 16:16:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:16:43,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:16:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2024-06-27 16:16:43,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 16:16:43,910 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 39 transitions. [2024-06-27 16:16:43,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 20 transitions, 84 flow [2024-06-27 16:16:43,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:16:43,913 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2024-06-27 16:16:43,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-06-27 16:16:43,917 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2024-06-27 16:16:43,917 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2024-06-27 16:16:43,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:16:43,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:16:43,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:16:43,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:16:43,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:16:43,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:16:43,919 INFO L85 PathProgramCache]: Analyzing trace with hash 189788603, now seen corresponding path program 1 times [2024-06-27 16:16:43,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:16:43,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979291938] [2024-06-27 16:16:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:16:43,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:16:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:16:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:44,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:16:44,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979291938] [2024-06-27 16:16:44,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979291938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:16:44,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:16:44,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:16:44,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811164052] [2024-06-27 16:16:44,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:16:44,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:16:44,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:16:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:16:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:16:44,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 16:16:44,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:16:44,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:16:44,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 16:16:44,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:16:44,555 INFO L124 PetriNetUnfolderBase]: 12/49 cut-off events. [2024-06-27 16:16:44,555 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-06-27 16:16:44,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 49 events. 12/49 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 77 event pairs, 5 based on Foata normal form. 1/48 useless extension candidates. Maximal degree in co-relation 84. Up to 27 conditions per place. [2024-06-27 16:16:44,556 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 17 selfloop transitions, 5 changer transitions 5/30 dead transitions. [2024-06-27 16:16:44,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 121 flow [2024-06-27 16:16:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:16:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:16:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 68 transitions. [2024-06-27 16:16:44,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269230769230769 [2024-06-27 16:16:44,561 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 8 states and 68 transitions. [2024-06-27 16:16:44,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 121 flow [2024-06-27 16:16:44,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:16:44,564 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 71 flow [2024-06-27 16:16:44,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=71, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2024-06-27 16:16:44,565 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2024-06-27 16:16:44,566 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 71 flow [2024-06-27 16:16:44,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:16:44,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:16:44,566 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:16:44,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:16:44,567 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:16:44,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:16:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1445022474, now seen corresponding path program 1 times [2024-06-27 16:16:44,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:16:44,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285581403] [2024-06-27 16:16:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:16:44,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:16:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:16:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:44,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:16:44,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285581403] [2024-06-27 16:16:44,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285581403] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:16:44,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963506305] [2024-06-27 16:16:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:16:44,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:16:44,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:16:44,727 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) [2024-06-27 16:16:44,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:16:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:16:44,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 16:16:44,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:16:44,911 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 [2024-06-27 16:16:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:44,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:16:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:44,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963506305] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:16:44,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:16:44,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-06-27 16:16:44,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387773201] [2024-06-27 16:16:44,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:16:44,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:16:44,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:16:44,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:16:44,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:16:44,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 16:16:44,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 71 flow. Second operand has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 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) [2024-06-27 16:16:44,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:16:44,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 16:16:44,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:16:45,070 INFO L124 PetriNetUnfolderBase]: 14/50 cut-off events. [2024-06-27 16:16:45,070 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:16:45,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 50 events. 14/50 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 6 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 121. Up to 29 conditions per place. [2024-06-27 16:16:45,071 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 19 selfloop transitions, 6 changer transitions 1/29 dead transitions. [2024-06-27 16:16:45,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 141 flow [2024-06-27 16:16:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:16:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:16:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-06-27 16:16:45,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175824175824176 [2024-06-27 16:16:45,072 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 71 flow. Second operand 7 states and 76 transitions. [2024-06-27 16:16:45,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 141 flow [2024-06-27 16:16:45,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 136 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 16:16:45,074 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 96 flow [2024-06-27 16:16:45,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=96, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2024-06-27 16:16:45,074 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2024-06-27 16:16:45,075 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 96 flow [2024-06-27 16:16:45,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 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) [2024-06-27 16:16:45,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:16:45,075 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:16:45,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:16:45,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:16:45,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:16:45,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:16:45,288 INFO L85 PathProgramCache]: Analyzing trace with hash -747664779, now seen corresponding path program 2 times [2024-06-27 16:16:45,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:16:45,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165620841] [2024-06-27 16:16:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:16:45,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:16:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:16:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:45,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:16:45,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165620841] [2024-06-27 16:16:45,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165620841] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:16:45,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788915671] [2024-06-27 16:16:45,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:16:45,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:16:45,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:16:45,425 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) [2024-06-27 16:16:45,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:16:45,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:16:45,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:16:45,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:16:45,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:16:45,564 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 [2024-06-27 16:16:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:45,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:16:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:45,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788915671] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:16:45,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:16:45,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-06-27 16:16:45,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593314533] [2024-06-27 16:16:45,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:16:45,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:16:45,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:16:45,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:16:45,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:16:45,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 16:16:45,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 96 flow. Second operand has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 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) [2024-06-27 16:16:45,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:16:45,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 16:16:45,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:16:45,743 INFO L124 PetriNetUnfolderBase]: 16/56 cut-off events. [2024-06-27 16:16:45,743 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 16:16:45,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 56 events. 16/56 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 6 based on Foata normal form. 2/57 useless extension candidates. Maximal degree in co-relation 150. Up to 29 conditions per place. [2024-06-27 16:16:45,744 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 21 selfloop transitions, 7 changer transitions 1/32 dead transitions. [2024-06-27 16:16:45,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 180 flow [2024-06-27 16:16:45,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:16:45,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:16:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-27 16:16:45,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41346153846153844 [2024-06-27 16:16:45,745 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 96 flow. Second operand 8 states and 86 transitions. [2024-06-27 16:16:45,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 180 flow [2024-06-27 16:16:45,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 32 transitions, 168 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 16:16:45,747 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 120 flow [2024-06-27 16:16:45,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2024-06-27 16:16:45,748 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2024-06-27 16:16:45,748 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 120 flow [2024-06-27 16:16:45,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 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) [2024-06-27 16:16:45,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:16:45,748 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:16:45,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:16:45,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-06-27 16:16:45,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:16:45,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:16:45,964 INFO L85 PathProgramCache]: Analyzing trace with hash 877351762, now seen corresponding path program 3 times [2024-06-27 16:16:45,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:16:45,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102220903] [2024-06-27 16:16:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:16:45,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:16:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:16:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:46,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:16:46,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102220903] [2024-06-27 16:16:46,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102220903] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:16:46,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577568686] [2024-06-27 16:16:46,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:16:46,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:16:46,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:16:46,138 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) [2024-06-27 16:16:46,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:16:46,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 16:16:46,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:16:46,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:16:46,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:16:46,348 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 [2024-06-27 16:16:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:46,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:16:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:46,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577568686] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:16:46,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:16:46,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-06-27 16:16:46,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146593216] [2024-06-27 16:16:46,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:16:46,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:16:46,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:16:46,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:16:46,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:16:46,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 16:16:46,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 120 flow. Second operand has 20 states, 20 states have (on average 9.75) internal successors, (195), 20 states have internal predecessors, (195), 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) [2024-06-27 16:16:46,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:16:46,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 16:16:46,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:16:46,649 INFO L124 PetriNetUnfolderBase]: 18/62 cut-off events. [2024-06-27 16:16:46,649 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-06-27 16:16:46,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 62 events. 18/62 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 6 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 188. Up to 29 conditions per place. [2024-06-27 16:16:46,650 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 23 selfloop transitions, 8 changer transitions 1/35 dead transitions. [2024-06-27 16:16:46,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 218 flow [2024-06-27 16:16:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:16:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:16:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-27 16:16:46,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-27 16:16:46,652 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 120 flow. Second operand 9 states and 96 transitions. [2024-06-27 16:16:46,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 218 flow [2024-06-27 16:16:46,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 35 transitions, 200 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 16:16:46,654 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 144 flow [2024-06-27 16:16:46,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=144, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2024-06-27 16:16:46,654 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2024-06-27 16:16:46,654 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 144 flow [2024-06-27 16:16:46,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.75) internal successors, (195), 20 states have internal predecessors, (195), 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) [2024-06-27 16:16:46,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:16:46,655 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:16:46,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:16:46,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:16:46,867 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:16:46,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:16:46,867 INFO L85 PathProgramCache]: Analyzing trace with hash -849848081, now seen corresponding path program 4 times [2024-06-27 16:16:46,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:16:46,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009514927] [2024-06-27 16:16:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:16:46,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:16:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:16:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:47,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:16:47,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009514927] [2024-06-27 16:16:47,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009514927] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:16:47,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690712875] [2024-06-27 16:16:47,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:16:47,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:16:47,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:16:47,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:16:47,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:16:47,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:16:47,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:16:47,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:16:47,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:16:47,304 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 [2024-06-27 16:16:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:47,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:16:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:47,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690712875] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:16:47,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:16:47,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-06-27 16:16:47,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899267099] [2024-06-27 16:16:47,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:16:47,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:16:47,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:16:47,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:16:47,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:16:47,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 16:16:47,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 144 flow. Second operand has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 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) [2024-06-27 16:16:47,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:16:47,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 16:16:47,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:16:47,645 INFO L124 PetriNetUnfolderBase]: 20/68 cut-off events. [2024-06-27 16:16:47,645 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-06-27 16:16:47,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 68 events. 20/68 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 6 based on Foata normal form. 2/69 useless extension candidates. Maximal degree in co-relation 226. Up to 29 conditions per place. [2024-06-27 16:16:47,649 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 25 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2024-06-27 16:16:47,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 38 transitions, 256 flow [2024-06-27 16:16:47,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:16:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:16:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-27 16:16:47,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076923076923077 [2024-06-27 16:16:47,651 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 144 flow. Second operand 10 states and 106 transitions. [2024-06-27 16:16:47,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 38 transitions, 256 flow [2024-06-27 16:16:47,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 232 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 16:16:47,655 INFO L231 Difference]: Finished difference. Result has 50 places, 30 transitions, 168 flow [2024-06-27 16:16:47,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=30} [2024-06-27 16:16:47,658 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2024-06-27 16:16:47,658 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 30 transitions, 168 flow [2024-06-27 16:16:47,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 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) [2024-06-27 16:16:47,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:16:47,659 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:16:47,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:16:47,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:16:47,870 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:16:47,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:16:47,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1463446348, now seen corresponding path program 5 times [2024-06-27 16:16:47,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:16:47,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114833034] [2024-06-27 16:16:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:16:47,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:16:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:16:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:48,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:16:48,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114833034] [2024-06-27 16:16:48,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114833034] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:16:48,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160076559] [2024-06-27 16:16:48,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:16:48,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:16:48,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:16:48,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:16:48,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:16:48,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-06-27 16:16:48,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:16:48,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:16:48,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:16:48,326 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 [2024-06-27 16:16:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:48,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:16:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:48,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160076559] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:16:48,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:16:48,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-06-27 16:16:48,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453572348] [2024-06-27 16:16:48,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:16:48,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:16:48,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:16:48,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:16:48,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:16:48,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 16:16:48,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 30 transitions, 168 flow. Second operand has 26 states, 26 states have (on average 9.576923076923077) internal successors, (249), 26 states have internal predecessors, (249), 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) [2024-06-27 16:16:48,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:16:48,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 16:16:48,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:16:48,750 INFO L124 PetriNetUnfolderBase]: 22/74 cut-off events. [2024-06-27 16:16:48,750 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-06-27 16:16:48,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 74 events. 22/74 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 6 based on Foata normal form. 2/75 useless extension candidates. Maximal degree in co-relation 264. Up to 29 conditions per place. [2024-06-27 16:16:48,751 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 27 selfloop transitions, 10 changer transitions 1/41 dead transitions. [2024-06-27 16:16:48,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 41 transitions, 294 flow [2024-06-27 16:16:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:16:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:16:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-27 16:16:48,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40559440559440557 [2024-06-27 16:16:48,755 INFO L175 Difference]: Start difference. First operand has 50 places, 30 transitions, 168 flow. Second operand 11 states and 116 transitions. [2024-06-27 16:16:48,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 41 transitions, 294 flow [2024-06-27 16:16:48,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 41 transitions, 264 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 16:16:48,758 INFO L231 Difference]: Finished difference. Result has 55 places, 32 transitions, 192 flow [2024-06-27 16:16:48,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=192, PETRI_PLACES=55, PETRI_TRANSITIONS=32} [2024-06-27 16:16:48,759 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2024-06-27 16:16:48,759 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 32 transitions, 192 flow [2024-06-27 16:16:48,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.576923076923077) internal successors, (249), 26 states have internal predecessors, (249), 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) [2024-06-27 16:16:48,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:16:48,760 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:16:48,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-27 16:16:48,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:16:48,971 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:16:48,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:16:48,972 INFO L85 PathProgramCache]: Analyzing trace with hash -253666711, now seen corresponding path program 6 times [2024-06-27 16:16:48,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:16:48,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194487740] [2024-06-27 16:16:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:16:48,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:16:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:16:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:49,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:16:49,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194487740] [2024-06-27 16:16:49,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194487740] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:16:49,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945298538] [2024-06-27 16:16:49,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:16:49,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:16:49,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:16:49,188 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:16:49,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:16:49,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-06-27 16:16:49,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:16:49,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 16:16:49,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:16:49,432 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 [2024-06-27 16:16:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:49,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:16:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:49,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945298538] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:16:49,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:16:49,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-06-27 16:16:49,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199200879] [2024-06-27 16:16:49,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:16:49,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:16:49,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:16:49,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:16:49,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:16:49,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 16:16:49,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 32 transitions, 192 flow. Second operand has 29 states, 29 states have (on average 9.517241379310345) internal successors, (276), 29 states have internal predecessors, (276), 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) [2024-06-27 16:16:49,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:16:49,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 16:16:49,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:16:50,046 INFO L124 PetriNetUnfolderBase]: 24/80 cut-off events. [2024-06-27 16:16:50,046 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-06-27 16:16:50,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 80 events. 24/80 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 6 based on Foata normal form. 2/81 useless extension candidates. Maximal degree in co-relation 302. Up to 29 conditions per place. [2024-06-27 16:16:50,047 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 29 selfloop transitions, 11 changer transitions 1/44 dead transitions. [2024-06-27 16:16:50,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 44 transitions, 332 flow [2024-06-27 16:16:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:16:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:16:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 126 transitions. [2024-06-27 16:16:50,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-27 16:16:50,048 INFO L175 Difference]: Start difference. First operand has 55 places, 32 transitions, 192 flow. Second operand 12 states and 126 transitions. [2024-06-27 16:16:50,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 44 transitions, 332 flow [2024-06-27 16:16:50,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 44 transitions, 296 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 16:16:50,050 INFO L231 Difference]: Finished difference. Result has 60 places, 34 transitions, 216 flow [2024-06-27 16:16:50,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=60, PETRI_TRANSITIONS=34} [2024-06-27 16:16:50,050 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2024-06-27 16:16:50,050 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 34 transitions, 216 flow [2024-06-27 16:16:50,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.517241379310345) internal successors, (276), 29 states have internal predecessors, (276), 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) [2024-06-27 16:16:50,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:16:50,050 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:16:50,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 16:16:50,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:16:50,251 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:16:50,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:16:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1131874746, now seen corresponding path program 7 times [2024-06-27 16:16:50,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:16:50,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577121664] [2024-06-27 16:16:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:16:50,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:16:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:16:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:51,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:16:51,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577121664] [2024-06-27 16:16:51,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577121664] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:16:51,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974671822] [2024-06-27 16:16:51,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:16:51,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:16:51,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:16:51,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:16:51,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:16:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:16:51,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 44 conjunts are in the unsatisfiable core [2024-06-27 16:16:51,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:16:51,570 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 11 treesize of output 7 [2024-06-27 16:16:51,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:16:51,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-06-27 16:16:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:16:51,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-06-27 16:16:51,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:16:51,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-06-27 16:16:51,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:16:51,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-06-27 16:16:51,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:16:51,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-06-27 16:16:51,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 16:16:51,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-06-27 16:16:51,878 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2024-06-27 16:16:51,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-06-27 16:16:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:16:51,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:18:59,561 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_179 Int) (v_ArrVal_189 Int) (v_ArrVal_188 Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_83| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_84| Int) (v_ArrVal_183 Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_81| Int) (v_ArrVal_181 Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_85| Int)) (or (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_81| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_83| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_85| (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_83| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_84| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_84| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_85| 1)) (= 66 (select (select (store |c_#memory_int#2| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| (store (store (store (store (store (select |c_#memory_int#2| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base|) (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1|) v_ArrVal_179) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_85| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_181) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_84| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_183) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_83| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_188) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset11#1_81| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_189)) c_~v~0.base) c_~v~0.offset)))) is different from false [2024-06-27 16:22:17,266 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 51338 treesize of output 51274 [2024-06-27 16:22:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 18 refuted. 11 times theorem prover too weak. 2 trivial. 7 not checked. [2024-06-27 16:22:20,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974671822] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:22:20,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:22:20,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 17] total 38 [2024-06-27 16:22:20,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749544302] [2024-06-27 16:22:20,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:22:20,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-06-27 16:22:20,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:22:20,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-06-27 16:22:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1013, Unknown=66, NotChecked=72, Total=1482 [2024-06-27 16:22:20,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 16:22:20,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 34 transitions, 216 flow. Second operand has 39 states, 39 states have (on average 6.769230769230769) internal successors, (264), 39 states have internal predecessors, (264), 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) [2024-06-27 16:22:20,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:22:20,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 16:22:20,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:22:21,318 INFO L124 PetriNetUnfolderBase]: 22/76 cut-off events. [2024-06-27 16:22:21,319 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2024-06-27 16:22:21,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 76 events. 22/76 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 78 event pairs, 1 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 290. Up to 20 conditions per place. [2024-06-27 16:22:21,319 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 0 selfloop transitions, 0 changer transitions 42/42 dead transitions. [2024-06-27 16:22:21,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 42 transitions, 312 flow [2024-06-27 16:22:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:22:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:22:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2024-06-27 16:22:21,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3021978021978022 [2024-06-27 16:22:21,320 INFO L175 Difference]: Start difference. First operand has 60 places, 34 transitions, 216 flow. Second operand 14 states and 110 transitions. [2024-06-27 16:22:21,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 42 transitions, 312 flow [2024-06-27 16:22:21,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 42 transitions, 270 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 16:22:21,322 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2024-06-27 16:22:21,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2024-06-27 16:22:21,323 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 37 predicate places. [2024-06-27 16:22:21,323 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2024-06-27 16:22:21,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.769230769230769) internal successors, (264), 39 states have internal predecessors, (264), 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) [2024-06-27 16:22:21,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2024-06-27 16:22:21,326 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2024-06-27 16:22:21,326 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-06-27 16:22:21,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:22:21,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:22:21,533 INFO L445 BasicCegarLoop]: Path program histogram: [7, 1, 1] [2024-06-27 16:22:21,535 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 16:22:21,537 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 16:22:21,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 04:22:21 BasicIcfg [2024-06-27 16:22:21,552 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 16:22:21,553 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-06-27 16:22:21,553 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-06-27 16:22:21,553 INFO L274 PluginConnector]: Witness Printer initialized [2024-06-27 16:22:21,554 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:16:43" (3/4) ... [2024-06-27 16:22:21,555 INFO L137 WitnessPrinter]: Generating witness for correct program [2024-06-27 16:22:21,560 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2024-06-27 16:22:21,560 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2024-06-27 16:22:21,570 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 38 nodes and edges [2024-06-27 16:22:21,570 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2024-06-27 16:22:21,570 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2024-06-27 16:22:21,570 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-06-27 16:22:21,570 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-06-27 16:22:21,637 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-06-27 16:22:21,637 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-06-27 16:22:21,637 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-06-27 16:22:21,638 INFO L158 Benchmark]: Toolchain (without parser) took 339391.71ms. Allocated memory was 232.8MB in the beginning and 608.2MB in the end (delta: 375.4MB). Free memory was 158.7MB in the beginning and 411.0MB in the end (delta: -252.3MB). Peak memory consumption was 126.3MB. Max. memory is 16.1GB. [2024-06-27 16:22:21,638 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 123.7MB. Free memory is still 88.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 16:22:21,638 INFO L158 Benchmark]: CACSL2BoogieTranslator took 550.36ms. Allocated memory is still 232.8MB. Free memory was 158.2MB in the beginning and 124.1MB in the end (delta: 34.1MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-06-27 16:22:21,639 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.31ms. Allocated memory is still 232.8MB. Free memory was 124.1MB in the beginning and 121.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 16:22:21,639 INFO L158 Benchmark]: Boogie Preprocessor took 79.83ms. Allocated memory is still 232.8MB. Free memory was 121.9MB in the beginning and 119.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 16:22:21,639 INFO L158 Benchmark]: RCFGBuilder took 429.82ms. Allocated memory is still 232.8MB. Free memory was 119.3MB in the beginning and 95.8MB in the end (delta: 23.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-06-27 16:22:21,640 INFO L158 Benchmark]: TraceAbstraction took 338186.43ms. Allocated memory was 232.8MB in the beginning and 608.2MB in the end (delta: 375.4MB). Free memory was 95.2MB in the beginning and 415.2MB in the end (delta: -319.9MB). Peak memory consumption was 57.1MB. Max. memory is 16.1GB. [2024-06-27 16:22:21,640 INFO L158 Benchmark]: Witness Printer took 84.62ms. Allocated memory is still 608.2MB. Free memory was 415.2MB in the beginning and 411.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 16:22:21,643 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 123.7MB. Free memory is still 88.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 550.36ms. Allocated memory is still 232.8MB. Free memory was 158.2MB in the beginning and 124.1MB in the end (delta: 34.1MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.31ms. Allocated memory is still 232.8MB. Free memory was 124.1MB in the beginning and 121.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 79.83ms. Allocated memory is still 232.8MB. Free memory was 121.9MB in the beginning and 119.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 429.82ms. Allocated memory is still 232.8MB. Free memory was 119.3MB in the beginning and 95.8MB in the end (delta: 23.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 338186.43ms. Allocated memory was 232.8MB in the beginning and 608.2MB in the end (delta: 375.4MB). Free memory was 95.2MB in the beginning and 415.2MB in the end (delta: -319.9MB). Peak memory consumption was 57.1MB. Max. memory is 16.1GB. * Witness Printer took 84.62ms. Allocated memory is still 608.2MB. Free memory was 415.2MB in the beginning and 411.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1107]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 338.1s, OverallIterations: 9, TraceHistogramMax: 8, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 318 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 318 mSDsluCounter, 179 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 34 IncrementalHoareTripleChecker+Unchecked, 173 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2519 IncrementalHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 6 mSDtfsCounter, 2519 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 487 GetRequests, 262 SyntacticMatches, 10 SemanticMatches, 215 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 327.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=216occurred in iteration=8, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 332.9s InterpolantComputationTime, 397 NumberOfCodeBlocks, 397 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 556 ConstructedInterpolants, 14 QuantifiedInterpolants, 5418 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1281 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 76/504 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 16:22:21,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE