./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-lit/sssc12_variant.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-lit/sssc12_variant.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 726fce4da80b267da781dea82372ef1c43891e7d5d6ac2b3894c611bc25a242b --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:23:06,275 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:23:06,344 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:23:06,349 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:23:06,349 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:23:06,372 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:23:06,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:23:06,372 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:23:06,373 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:23:06,376 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:23:06,376 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:23:06,376 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:23:06,377 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:23:06,378 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:23:06,378 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:23:06,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:23:06,379 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:23:06,379 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:23:06,379 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:23:06,379 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:23:06,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:23:06,380 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:23:06,380 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:23:06,380 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:23:06,380 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:23:06,381 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:23:06,381 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:23:06,381 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:23:06,382 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:23:06,382 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:23:06,383 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:23:06,383 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:23:06,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:23:06,383 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:23:06,383 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:23:06,383 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:23:06,384 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:23:06,384 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:23:06,384 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:23:06,384 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:23:06,384 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:23:06,385 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:23:06,385 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:23:06,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 726fce4da80b267da781dea82372ef1c43891e7d5d6ac2b3894c611bc25a242b [2024-06-27 16:23:06,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:23:06,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:23:06,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:23:06,604 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:23:06,613 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:23:06,615 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/sssc12_variant.i [2024-06-27 16:23:07,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:23:07,898 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:23:07,906 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/sssc12_variant.i [2024-06-27 16:23:07,920 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c29a9ba1/a5ce3ac2f3404d8c85579881b368ef9f/FLAG6c96ad5a0 [2024-06-27 16:23:07,938 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c29a9ba1/a5ce3ac2f3404d8c85579881b368ef9f [2024-06-27 16:23:07,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:23:07,941 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:23:07,942 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:23:07,943 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:23:07,946 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:23:07,947 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:23:07" (1/1) ... [2024-06-27 16:23:07,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe983ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:07, skipping insertion in model container [2024-06-27 16:23:07,948 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:23:07" (1/1) ... [2024-06-27 16:23:07,980 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:23:08,300 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-lit/sssc12_variant.i[46865,46878] [2024-06-27 16:23:08,331 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:23:08,337 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:23:08,393 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-lit/sssc12_variant.i[46865,46878] [2024-06-27 16:23:08,406 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:23:08,482 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:23:08,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08 WrapperNode [2024-06-27 16:23:08,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:23:08,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:23:08,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:23:08,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:23:08,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (1/1) ... [2024-06-27 16:23:08,505 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (1/1) ... [2024-06-27 16:23:08,530 INFO L138 Inliner]: procedures = 274, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 82 [2024-06-27 16:23:08,530 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:23:08,531 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:23:08,531 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:23:08,531 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:23:08,540 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (1/1) ... [2024-06-27 16:23:08,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (1/1) ... [2024-06-27 16:23:08,542 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (1/1) ... [2024-06-27 16:23:08,557 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 16:23:08,558 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (1/1) ... [2024-06-27 16:23:08,558 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (1/1) ... [2024-06-27 16:23:08,561 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (1/1) ... [2024-06-27 16:23:08,564 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (1/1) ... [2024-06-27 16:23:08,565 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (1/1) ... [2024-06-27 16:23:08,566 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (1/1) ... [2024-06-27 16:23:08,567 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:23:08,568 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:23:08,568 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:23:08,568 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:23:08,569 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (1/1) ... [2024-06-27 16:23:08,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:23:08,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:23:08,625 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 16:23:08,670 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 16:23:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:23:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2024-06-27 16:23:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2024-06-27 16:23:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:23:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:23:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:23:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:23:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:23:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:23:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:23:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:23:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:23:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:23:08,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:23:08,699 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 16:23:08,824 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:23:08,826 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:23:08,995 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:23:08,995 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:23:09,096 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:23:09,096 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 16:23:09,096 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:23:09 BoogieIcfgContainer [2024-06-27 16:23:09,097 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:23:09,098 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:23:09,098 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:23:09,100 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:23:09,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:23:07" (1/3) ... [2024-06-27 16:23:09,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b9a387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:23:09, skipping insertion in model container [2024-06-27 16:23:09,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:23:08" (2/3) ... [2024-06-27 16:23:09,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b9a387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:23:09, skipping insertion in model container [2024-06-27 16:23:09,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:23:09" (3/3) ... [2024-06-27 16:23:09,103 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12_variant.i [2024-06-27 16:23:09,109 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:23:09,116 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:23:09,116 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:23:09,116 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:23:09,144 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:23:09,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 19 places, 18 transitions, 40 flow [2024-06-27 16:23:09,193 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-06-27 16:23:09,193 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:23:09,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 20 events. 2/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-06-27 16:23:09,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 19 places, 18 transitions, 40 flow [2024-06-27 16:23:09,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 18 transitions, 40 flow [2024-06-27 16:23:09,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:23:09,212 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;@7db7214f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:23:09,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:23:09,216 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:23:09,218 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-27 16:23:09,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:23:09,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:23:09,219 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-06-27 16:23:09,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-06-27 16:23:09,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:23:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1039841252, now seen corresponding path program 1 times [2024-06-27 16:23:09,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:23:09,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15815889] [2024-06-27 16:23:09,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:23:09,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:23:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:23:09,327 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:23:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:23:09,379 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:23:09,382 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:23:09,383 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-06-27 16:23:09,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-06-27 16:23:09,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-06-27 16:23:09,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:23:09,386 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:23:09,393 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:23:09,394 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 16:23:09,423 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:23:09,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 31 transitions, 72 flow [2024-06-27 16:23:09,438 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2024-06-27 16:23:09,441 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:23:09,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 36 events. 4/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 3 conditions per place. [2024-06-27 16:23:09,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 31 transitions, 72 flow [2024-06-27 16:23:09,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 31 transitions, 72 flow [2024-06-27 16:23:09,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:23:09,447 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;@7db7214f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:23:09,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:23:09,458 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:23:09,459 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2024-06-27 16:23:09,459 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:23:09,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:23:09,459 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-06-27 16:23:09,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 16:23:09,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:23:09,460 INFO L85 PathProgramCache]: Analyzing trace with hash 110076381, now seen corresponding path program 1 times [2024-06-27 16:23:09,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:23:09,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526890635] [2024-06-27 16:23:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:23:09,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:23:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:23:09,494 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:23:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:23:09,526 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:23:09,526 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:23:09,527 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-06-27 16:23:09,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-06-27 16:23:09,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-06-27 16:23:09,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-06-27 16:23:09,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:23:09,528 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:23:09,528 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:23:09,528 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 16:23:09,550 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:23:09,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 106 flow [2024-06-27 16:23:09,573 INFO L124 PetriNetUnfolderBase]: 6/52 cut-off events. [2024-06-27 16:23:09,573 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 16:23:09,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 6/52 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2024-06-27 16:23:09,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 106 flow [2024-06-27 16:23:09,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 106 flow [2024-06-27 16:23:09,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:23:09,580 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;@7db7214f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:23:09,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:23:09,590 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:23:09,590 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2024-06-27 16:23:09,590 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 16:23:09,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:23:09,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:23:09,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:23:09,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:23:09,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1229004444, now seen corresponding path program 1 times [2024-06-27 16:23:09,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:23:09,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558369335] [2024-06-27 16:23:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:23:09,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:23:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:23:09,850 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 16:23:09,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:23:09,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558369335] [2024-06-27 16:23:09,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558369335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:23:09,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:23:09,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:23:09,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115369729] [2024-06-27 16:23:09,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:23:09,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:23:09,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:23:09,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:23:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:23:09,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 16:23:09,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 16:23:09,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:23:09,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 16:23:09,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:23:10,564 INFO L124 PetriNetUnfolderBase]: 4936/7557 cut-off events. [2024-06-27 16:23:10,565 INFO L125 PetriNetUnfolderBase]: For 443/443 co-relation queries the response was YES. [2024-06-27 16:23:10,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14530 conditions, 7557 events. 4936/7557 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 42988 event pairs, 2865 based on Foata normal form. 417/6663 useless extension candidates. Maximal degree in co-relation 4829. Up to 4875 conditions per place. [2024-06-27 16:23:10,609 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 44 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-06-27 16:23:10,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 234 flow [2024-06-27 16:23:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:23:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:23:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-27 16:23:10,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-06-27 16:23:10,621 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 106 flow. Second operand 3 states and 86 transitions. [2024-06-27 16:23:10,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 234 flow [2024-06-27 16:23:10,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 230 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 16:23:10,634 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 96 flow [2024-06-27 16:23:10,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2024-06-27 16:23:10,639 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -1 predicate places. [2024-06-27 16:23:10,640 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 96 flow [2024-06-27 16:23:10,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 16:23:10,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:23:10,640 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-06-27 16:23:10,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:23:10,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:23:10,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:23:10,641 INFO L85 PathProgramCache]: Analyzing trace with hash 352415483, now seen corresponding path program 1 times [2024-06-27 16:23:10,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:23:10,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146625262] [2024-06-27 16:23:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:23:10,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:23:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:23:10,659 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:23:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:23:10,684 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:23:10,685 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:23:10,685 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-06-27 16:23:10,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 16:23:10,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 16:23:10,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-06-27 16:23:10,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 16:23:10,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:23:10,686 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-06-27 16:23:10,687 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:23:10,687 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-06-27 16:23:10,717 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:23:10,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 57 transitions, 142 flow [2024-06-27 16:23:10,726 INFO L124 PetriNetUnfolderBase]: 8/68 cut-off events. [2024-06-27 16:23:10,726 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-27 16:23:10,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 68 events. 8/68 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 159 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 64. Up to 5 conditions per place. [2024-06-27 16:23:10,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 57 transitions, 142 flow [2024-06-27 16:23:10,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 142 flow [2024-06-27 16:23:10,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:23:10,732 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;@7db7214f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:23:10,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 16:23:10,735 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:23:10,735 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2024-06-27 16:23:10,736 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-06-27 16:23:10,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:23:10,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:23:10,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:23:10,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:23:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash 400651073, now seen corresponding path program 1 times [2024-06-27 16:23:10,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:23:10,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522438827] [2024-06-27 16:23:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:23:10,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:23:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:23:10,868 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 16:23:10,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:23:10,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522438827] [2024-06-27 16:23:10,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522438827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:23:10,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:23:10,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:23:10,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591092310] [2024-06-27 16:23:10,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:23:10,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:23:10,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:23:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:23:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:23:10,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-06-27 16:23:10,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 16:23:10,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:23:10,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-06-27 16:23:10,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:23:15,877 INFO L124 PetriNetUnfolderBase]: 55640/76624 cut-off events. [2024-06-27 16:23:15,878 INFO L125 PetriNetUnfolderBase]: For 6329/6329 co-relation queries the response was YES. [2024-06-27 16:23:16,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149221 conditions, 76624 events. 55640/76624 cut-off events. For 6329/6329 co-relation queries the response was YES. Maximal size of possible extension queue 2328. Compared 489898 event pairs, 32283 based on Foata normal form. 5083/67572 useless extension candidates. Maximal degree in co-relation 14507. Up to 51201 conditions per place. [2024-06-27 16:23:16,349 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 60 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-06-27 16:23:16,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 325 flow [2024-06-27 16:23:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:23:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:23:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2024-06-27 16:23:16,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6783625730994152 [2024-06-27 16:23:16,353 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 142 flow. Second operand 3 states and 116 transitions. [2024-06-27 16:23:16,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 325 flow [2024-06-27 16:23:16,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 313 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-27 16:23:16,361 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 126 flow [2024-06-27 16:23:16,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-27 16:23:16,362 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2024-06-27 16:23:16,363 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 126 flow [2024-06-27 16:23:16,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 16:23:16,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:23:16,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:23:16,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:23:16,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:23:16,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:23:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash -552292285, now seen corresponding path program 1 times [2024-06-27 16:23:16,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:23:16,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428597525] [2024-06-27 16:23:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:23:16,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:23:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:23:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:23:16,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:23:16,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428597525] [2024-06-27 16:23:16,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428597525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:23:16,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:23:16,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:23:16,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231037266] [2024-06-27 16:23:16,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:23:16,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:23:16,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:23:16,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:23:16,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:23:16,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-06-27 16:23:16,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 16:23:16,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:23:16,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-06-27 16:23:16,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:23:20,948 INFO L124 PetriNetUnfolderBase]: 55294/76281 cut-off events. [2024-06-27 16:23:20,964 INFO L125 PetriNetUnfolderBase]: For 7739/7739 co-relation queries the response was YES. [2024-06-27 16:23:21,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152619 conditions, 76281 events. 55294/76281 cut-off events. For 7739/7739 co-relation queries the response was YES. Maximal size of possible extension queue 2331. Compared 490363 event pairs, 32132 based on Foata normal form. 0/65776 useless extension candidates. Maximal degree in co-relation 116463. Up to 50858 conditions per place. [2024-06-27 16:23:21,453 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 59 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-06-27 16:23:21,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 73 transitions, 308 flow [2024-06-27 16:23:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:23:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:23:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-06-27 16:23:21,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6257309941520468 [2024-06-27 16:23:21,460 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 126 flow. Second operand 3 states and 107 transitions. [2024-06-27 16:23:21,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 73 transitions, 308 flow [2024-06-27 16:23:21,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 300 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:23:21,473 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 122 flow [2024-06-27 16:23:21,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-27 16:23:21,476 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2024-06-27 16:23:21,476 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 122 flow [2024-06-27 16:23:21,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 16:23:21,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:23:21,477 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-06-27 16:23:21,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 16:23:21,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:23:21,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:23:21,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2019556455, now seen corresponding path program 1 times [2024-06-27 16:23:21,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:23:21,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959697392] [2024-06-27 16:23:21,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:23:21,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:23:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:23:21,490 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:23:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:23:21,507 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:23:21,510 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:23:21,510 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-06-27 16:23:21,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-06-27 16:23:21,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-06-27 16:23:21,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-06-27 16:23:21,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-06-27 16:23:21,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-06-27 16:23:21,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 16:23:21,511 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-06-27 16:23:21,512 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:23:21,512 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-06-27 16:23:21,546 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:23:21,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 70 transitions, 180 flow [2024-06-27 16:23:21,555 INFO L124 PetriNetUnfolderBase]: 10/84 cut-off events. [2024-06-27 16:23:21,556 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-27 16:23:21,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 84 events. 10/84 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 218 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2024-06-27 16:23:21,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 70 transitions, 180 flow [2024-06-27 16:23:21,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 70 transitions, 180 flow [2024-06-27 16:23:21,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:23:21,559 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;@7db7214f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:23:21,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 16:23:21,563 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:23:21,563 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2024-06-27 16:23:21,563 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-06-27 16:23:21,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:23:21,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:23:21,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-06-27 16:23:21,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:23:21,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1331912659, now seen corresponding path program 1 times [2024-06-27 16:23:21,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:23:21,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589328585] [2024-06-27 16:23:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:23:21,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:23:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:23:21,768 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 16:23:21,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:23:21,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589328585] [2024-06-27 16:23:21,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589328585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:23:21,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:23:21,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:23:21,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612069885] [2024-06-27 16:23:21,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:23:21,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:23:21,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:23:21,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:23:21,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:23:21,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 70 [2024-06-27 16:23:21,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 16:23:21,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:23:21,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 70 [2024-06-27 16:23:21,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand