./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-three-array-max.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/popl20-three-array-max.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-three-array-max.wvr.c ./goblint.2024-06-19_11-23-25.files/protection/popl20-three-array-max.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:06:42,250 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:06:42,330 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:06:42,336 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:06:42,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:06:42,367 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:06:42,367 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:06:42,368 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:06:42,369 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:06:42,372 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:06:42,373 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:06:42,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:06:42,374 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:06:42,375 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:06:42,375 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:06:42,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:06:42,376 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:06:42,376 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:06:42,377 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:06:42,377 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:06:42,377 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:06:42,378 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:06:42,378 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:06:42,378 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:06:42,378 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:06:42,379 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:06:42,379 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:06:42,379 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:06:42,380 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:06:42,380 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:06:42,381 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:06:42,381 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:06:42,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:06:42,382 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:06:42,382 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:06:42,382 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:06:42,382 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:06:42,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:06:42,383 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:06:42,383 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:06:42,383 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:06:42,384 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:06:42,384 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:06:42,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:06:42,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:06:42,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:06:42,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:06:42,671 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:06:42,672 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:06:42,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-max.wvr.c [2024-06-21 16:06:43,836 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:06:44,033 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:06:44,033 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-max.wvr.c [2024-06-21 16:06:44,040 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f121f00e1/6b98d389262e4af28720f000941c1e5a/FLAGf5c7e3198 [2024-06-21 16:06:44,051 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f121f00e1/6b98d389262e4af28720f000941c1e5a [2024-06-21 16:06:44,053 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:06:44,053 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:06:44,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/popl20-three-array-max.wvr.yml/witness.yml [2024-06-21 16:06:44,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:06:44,118 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:06:44,120 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:06:44,120 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:06:44,124 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:06:44,125 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:06:44" (1/2) ... [2024-06-21 16:06:44,126 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@542b4398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:06:44, skipping insertion in model container [2024-06-21 16:06:44,126 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:06:44" (1/2) ... [2024-06-21 16:06:44,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ddf93b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:06:44, skipping insertion in model container [2024-06-21 16:06:44,127 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:06:44" (2/2) ... [2024-06-21 16:06:44,128 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@542b4398 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44, skipping insertion in model container [2024-06-21 16:06:44,128 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:06:44" (2/2) ... [2024-06-21 16:06:44,128 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:06:44,140 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:06:44,141 INFO L97 edCorrectnessWitness]: Location invariant before [L107-L107] ! multithreaded || 1 <= p [2024-06-21 16:06:44,141 INFO L97 edCorrectnessWitness]: Location invariant before [L109-L109] ! multithreaded || 1 <= p [2024-06-21 16:06:44,141 INFO L97 edCorrectnessWitness]: Location invariant before [L108-L108] ! multithreaded || 1 <= p [2024-06-21 16:06:44,142 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:06:44,142 INFO L106 edCorrectnessWitness]: ghost_update [L106-L106] multithreaded = 1; [2024-06-21 16:06:44,160 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:06:44,436 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:06:44,446 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:06:44,527 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:06:44,549 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:06:44,550 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44 WrapperNode [2024-06-21 16:06:44,550 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:06:44,551 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:06:44,552 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:06:44,552 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:06:44,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (1/1) ... [2024-06-21 16:06:44,578 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (1/1) ... [2024-06-21 16:06:44,619 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 230 [2024-06-21 16:06:44,620 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:06:44,621 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:06:44,621 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:06:44,621 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:06:44,632 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (1/1) ... [2024-06-21 16:06:44,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (1/1) ... [2024-06-21 16:06:44,646 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (1/1) ... [2024-06-21 16:06:44,667 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-06-21 16:06:44,668 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (1/1) ... [2024-06-21 16:06:44,668 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (1/1) ... [2024-06-21 16:06:44,676 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (1/1) ... [2024-06-21 16:06:44,680 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (1/1) ... [2024-06-21 16:06:44,682 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (1/1) ... [2024-06-21 16:06:44,684 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (1/1) ... [2024-06-21 16:06:44,687 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:06:44,688 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:06:44,688 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:06:44,688 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:06:44,689 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (1/1) ... [2024-06-21 16:06:44,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:06:44,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:06:44,732 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) [2024-06-21 16:06:44,738 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 [2024-06-21 16:06:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:06:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-21 16:06:44,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-21 16:06:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-21 16:06:44,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-21 16:06:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-21 16:06:44,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-21 16:06:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:06:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 16:06:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 16:06:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 16:06:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:06:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:06:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-21 16:06:44,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:06:44,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:06:44,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 16:06:44,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 16:06:44,768 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:06:44,866 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:06:44,868 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:06:45,215 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:06:45,215 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:06:45,622 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:06:45,622 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-06-21 16:06:45,623 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:06:45 BoogieIcfgContainer [2024-06-21 16:06:45,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:06:45,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:06:45,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:06:45,629 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:06:45,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:06:44" (1/4) ... [2024-06-21 16:06:45,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21628320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:06:45, skipping insertion in model container [2024-06-21 16:06:45,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:06:44" (2/4) ... [2024-06-21 16:06:45,631 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21628320 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:06:45, skipping insertion in model container [2024-06-21 16:06:45,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:06:44" (3/4) ... [2024-06-21 16:06:45,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21628320 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:06:45, skipping insertion in model container [2024-06-21 16:06:45,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:06:45" (4/4) ... [2024-06-21 16:06:45,636 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-06-21 16:06:45,654 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:06:45,655 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:06:45,655 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:06:45,704 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-21 16:06:45,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 44 transitions, 109 flow [2024-06-21 16:06:45,783 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2024-06-21 16:06:45,784 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-21 16:06:45,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 41 events. 7/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 48 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-06-21 16:06:45,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 44 transitions, 109 flow [2024-06-21 16:06:45,793 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 39 transitions, 93 flow [2024-06-21 16:06:45,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:06:45,820 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=false, 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;@633bc49e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:06:45,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:06:45,833 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:06:45,833 INFO L124 PetriNetUnfolderBase]: 4/12 cut-off events. [2024-06-21 16:06:45,833 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:06:45,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:45,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:45,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:45,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1900933197, now seen corresponding path program 1 times [2024-06-21 16:06:45,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:45,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984346337] [2024-06-21 16:06:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:45,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:46,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:46,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984346337] [2024-06-21 16:06:46,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984346337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:46,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:46,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:06:46,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172141616] [2024-06-21 16:06:46,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:46,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:06:46,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:46,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:06:46,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:06:46,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:06:46,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-06-21 16:06:46,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:46,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:06:46,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:46,482 INFO L124 PetriNetUnfolderBase]: 753/1193 cut-off events. [2024-06-21 16:06:46,482 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-06-21 16:06:46,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2337 conditions, 1193 events. 753/1193 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5111 event pairs, 237 based on Foata normal form. 45/1097 useless extension candidates. Maximal degree in co-relation 2061. Up to 675 conditions per place. [2024-06-21 16:06:46,493 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 42 selfloop transitions, 2 changer transitions 1/53 dead transitions. [2024-06-21 16:06:46,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 220 flow [2024-06-21 16:06:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:06:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:06:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-21 16:06:46,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-06-21 16:06:46,507 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 93 flow. Second operand 3 states and 81 transitions. [2024-06-21 16:06:46,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 220 flow [2024-06-21 16:06:46,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 53 transitions, 206 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 16:06:46,516 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 96 flow [2024-06-21 16:06:46,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2024-06-21 16:06:46,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2024-06-21 16:06:46,522 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 96 flow [2024-06-21 16:06:46,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-06-21 16:06:46,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:46,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:46,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:06:46,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:46,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2104987631, now seen corresponding path program 1 times [2024-06-21 16:06:46,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:46,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474867312] [2024-06-21 16:06:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:46,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:46,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:46,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474867312] [2024-06-21 16:06:46,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474867312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:46,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:46,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:06:46,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707477618] [2024-06-21 16:06:46,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:46,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:06:46,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:46,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:06:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:06:46,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:06:46,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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) [2024-06-21 16:06:46,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:46,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:06:46,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:46,993 INFO L124 PetriNetUnfolderBase]: 1067/1708 cut-off events. [2024-06-21 16:06:46,994 INFO L125 PetriNetUnfolderBase]: For 265/265 co-relation queries the response was YES. [2024-06-21 16:06:46,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3506 conditions, 1708 events. 1067/1708 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7935 event pairs, 405 based on Foata normal form. 54/1582 useless extension candidates. Maximal degree in co-relation 891. Up to 922 conditions per place. [2024-06-21 16:06:47,006 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 67 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2024-06-21 16:06:47,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 80 transitions, 334 flow [2024-06-21 16:06:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:06:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:06:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 16:06:47,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5954545454545455 [2024-06-21 16:06:47,012 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 96 flow. Second operand 5 states and 131 transitions. [2024-06-21 16:06:47,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 80 transitions, 334 flow [2024-06-21 16:06:47,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 80 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:06:47,016 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 133 flow [2024-06-21 16:06:47,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-06-21 16:06:47,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 16:06:47,019 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 133 flow [2024-06-21 16:06:47,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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) [2024-06-21 16:06:47,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:47,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:47,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:06:47,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:47,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1701493938, now seen corresponding path program 1 times [2024-06-21 16:06:47,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:47,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082252072] [2024-06-21 16:06:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:47,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-21 16:06:47,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:47,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082252072] [2024-06-21 16:06:47,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082252072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:47,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:47,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:06:47,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661908414] [2024-06-21 16:06:47,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:47,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:06:47,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:06:47,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:06:47,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 16:06:47,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 133 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) [2024-06-21 16:06:47,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:47,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 16:06:47,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:47,414 INFO L124 PetriNetUnfolderBase]: 961/1589 cut-off events. [2024-06-21 16:06:47,415 INFO L125 PetriNetUnfolderBase]: For 1005/1020 co-relation queries the response was YES. [2024-06-21 16:06:47,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 1589 events. 961/1589 cut-off events. For 1005/1020 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7534 event pairs, 697 based on Foata normal form. 0/1388 useless extension candidates. Maximal degree in co-relation 1429. Up to 1317 conditions per place. [2024-06-21 16:06:47,426 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 31 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-06-21 16:06:47,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 201 flow [2024-06-21 16:06:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:06:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:06:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 16:06:47,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-21 16:06:47,430 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 133 flow. Second operand 3 states and 72 transitions. [2024-06-21 16:06:47,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 201 flow [2024-06-21 16:06:47,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 194 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 16:06:47,434 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 138 flow [2024-06-21 16:06:47,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-21 16:06:47,435 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-21 16:06:47,436 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 138 flow [2024-06-21 16:06:47,436 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) [2024-06-21 16:06:47,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:47,436 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:47,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:06:47,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:47,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:47,438 INFO L85 PathProgramCache]: Analyzing trace with hash -817811056, now seen corresponding path program 1 times [2024-06-21 16:06:47,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:47,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111871745] [2024-06-21 16:06:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:47,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-21 16:06:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:47,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111871745] [2024-06-21 16:06:47,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111871745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:47,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:47,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:06:47,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134822417] [2024-06-21 16:06:47,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:47,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:06:47,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:47,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:06:47,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:06:47,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 16:06:47,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2024-06-21 16:06:47,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:47,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 16:06:47,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:47,791 INFO L124 PetriNetUnfolderBase]: 961/1591 cut-off events. [2024-06-21 16:06:47,792 INFO L125 PetriNetUnfolderBase]: For 727/742 co-relation queries the response was YES. [2024-06-21 16:06:47,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3673 conditions, 1591 events. 961/1591 cut-off events. For 727/742 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7482 event pairs, 697 based on Foata normal form. 1/1391 useless extension candidates. Maximal degree in co-relation 3658. Up to 1316 conditions per place. [2024-06-21 16:06:47,804 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 29 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2024-06-21 16:06:47,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 212 flow [2024-06-21 16:06:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:06:47,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:06:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-21 16:06:47,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056818181818182 [2024-06-21 16:06:47,806 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 138 flow. Second operand 4 states and 89 transitions. [2024-06-21 16:06:47,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 212 flow [2024-06-21 16:06:47,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 208 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 16:06:47,812 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 162 flow [2024-06-21 16:06:47,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2024-06-21 16:06:47,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-21 16:06:47,814 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 162 flow [2024-06-21 16:06:47,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2024-06-21 16:06:47,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:47,815 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:47,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:06:47,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:47,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash -44175725, now seen corresponding path program 1 times [2024-06-21 16:06:47,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:47,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876799075] [2024-06-21 16:06:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:47,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-21 16:06:47,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:47,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876799075] [2024-06-21 16:06:47,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876799075] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-21 16:06:47,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996708643] [2024-06-21 16:06:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:47,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-21 16:06:47,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:06:47,976 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) [2024-06-21 16:06:47,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-21 16:06:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:48,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-21 16:06:48,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 16:06:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-21 16:06:48,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-21 16:06:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-21 16:06:48,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996708643] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-21 16:06:48,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-21 16:06:48,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-06-21 16:06:48,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211257538] [2024-06-21 16:06:48,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-21 16:06:48,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:06:48,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:48,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:06:48,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:06:48,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:06:48,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 162 flow. Second operand has 12 states, 12 states have (on average 15.25) internal successors, (183), 12 states have internal predecessors, (183), 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) [2024-06-21 16:06:48,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:48,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:06:48,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:48,643 INFO L124 PetriNetUnfolderBase]: 1536/2457 cut-off events. [2024-06-21 16:06:48,643 INFO L125 PetriNetUnfolderBase]: For 672/711 co-relation queries the response was YES. [2024-06-21 16:06:48,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5519 conditions, 2457 events. 1536/2457 cut-off events. For 672/711 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11713 event pairs, 1058 based on Foata normal form. 44/2220 useless extension candidates. Maximal degree in co-relation 4511. Up to 1728 conditions per place. [2024-06-21 16:06:48,659 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 30 selfloop transitions, 9 changer transitions 44/92 dead transitions. [2024-06-21 16:06:48,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 92 transitions, 478 flow [2024-06-21 16:06:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:06:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:06:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 16:06:48,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-21 16:06:48,662 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 162 flow. Second operand 9 states and 197 transitions. [2024-06-21 16:06:48,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 92 transitions, 478 flow [2024-06-21 16:06:48,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 92 transitions, 477 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:06:48,666 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 219 flow [2024-06-21 16:06:48,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=219, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2024-06-21 16:06:48,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-21 16:06:48,668 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 219 flow [2024-06-21 16:06:48,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.25) internal successors, (183), 12 states have internal predecessors, (183), 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) [2024-06-21 16:06:48,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:48,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:48,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-21 16:06:48,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-21 16:06:48,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:48,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:48,881 INFO L85 PathProgramCache]: Analyzing trace with hash 195977730, now seen corresponding path program 2 times [2024-06-21 16:06:48,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:48,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614203307] [2024-06-21 16:06:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:48,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-21 16:06:48,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:48,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614203307] [2024-06-21 16:06:48,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614203307] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-21 16:06:48,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363894275] [2024-06-21 16:06:48,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-21 16:06:48,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-21 16:06:48,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:06:48,966 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) [2024-06-21 16:06:48,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-21 16:06:49,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-21 16:06:49,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-21 16:06:49,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-21 16:06:49,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-21 16:06:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-21 16:06:49,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-21 16:06:49,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363894275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:49,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-21 16:06:49,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-06-21 16:06:49,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684645490] [2024-06-21 16:06:49,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:49,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:06:49,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:49,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:06:49,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:06:49,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:06:49,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-06-21 16:06:49,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:49,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:06:49,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:49,418 INFO L124 PetriNetUnfolderBase]: 904/1518 cut-off events. [2024-06-21 16:06:49,418 INFO L125 PetriNetUnfolderBase]: For 715/718 co-relation queries the response was YES. [2024-06-21 16:06:49,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3709 conditions, 1518 events. 904/1518 cut-off events. For 715/718 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7361 event pairs, 202 based on Foata normal form. 54/1425 useless extension candidates. Maximal degree in co-relation 3671. Up to 409 conditions per place. [2024-06-21 16:06:49,424 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 0 selfloop transitions, 0 changer transitions 96/96 dead transitions. [2024-06-21 16:06:49,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 96 transitions, 494 flow [2024-06-21 16:06:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:06:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:06:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 16:06:49,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-21 16:06:49,426 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 219 flow. Second operand 6 states and 152 transitions. [2024-06-21 16:06:49,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 96 transitions, 494 flow [2024-06-21 16:06:49,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 96 transitions, 468 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:06:49,433 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2024-06-21 16:06:49,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2024-06-21 16:06:49,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-21 16:06:49,436 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2024-06-21 16:06:49,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-06-21 16:06:49,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-21 16:06:49,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-21 16:06:49,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-21 16:06:49,440 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-21 16:06:49,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-21 16:06:49,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-21 16:06:49,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-21 16:06:49,664 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,SelfDestructingSolverStorable5 [2024-06-21 16:06:49,665 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2024-06-21 16:06:49,668 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 16:06:49,668 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 16:06:49,672 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-21 16:06:49,672 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-21 16:06:49,673 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 04:06:49 BasicIcfg [2024-06-21 16:06:49,673 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 16:06:49,673 INFO L158 Benchmark]: Toolchain (without parser) took 5555.19ms. Allocated memory was 136.3MB in the beginning and 255.9MB in the end (delta: 119.5MB). Free memory was 65.2MB in the beginning and 149.2MB in the end (delta: -84.0MB). Peak memory consumption was 115.2MB. Max. memory is 16.1GB. [2024-06-21 16:06:49,674 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 136.3MB. Free memory is still 91.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 16:06:49,674 INFO L158 Benchmark]: Witness Parser took 0.20ms. Allocated memory is still 136.3MB. Free memory is still 67.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 16:06:49,674 INFO L158 Benchmark]: CACSL2BoogieTranslator took 430.96ms. Allocated memory is still 136.3MB. Free memory was 65.0MB in the beginning and 105.3MB in the end (delta: -40.3MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2024-06-21 16:06:49,675 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.61ms. Allocated memory is still 136.3MB. Free memory was 105.3MB in the beginning and 103.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 16:06:49,675 INFO L158 Benchmark]: Boogie Preprocessor took 66.17ms. Allocated memory is still 136.3MB. Free memory was 103.1MB in the beginning and 99.8MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 16:06:49,676 INFO L158 Benchmark]: RCFGBuilder took 935.38ms. Allocated memory was 136.3MB in the beginning and 192.9MB in the end (delta: 56.6MB). Free memory was 99.8MB in the beginning and 129.2MB in the end (delta: -29.4MB). Peak memory consumption was 56.6MB. Max. memory is 16.1GB. [2024-06-21 16:06:49,676 INFO L158 Benchmark]: TraceAbstraction took 4047.20ms. Allocated memory was 192.9MB in the beginning and 255.9MB in the end (delta: 62.9MB). Free memory was 128.1MB in the beginning and 149.2MB in the end (delta: -21.1MB). Peak memory consumption was 120.5MB. Max. memory is 16.1GB. [2024-06-21 16:06:49,678 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 136.3MB. Free memory is still 91.8MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.20ms. Allocated memory is still 136.3MB. Free memory is still 67.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 430.96ms. Allocated memory is still 136.3MB. Free memory was 65.0MB in the beginning and 105.3MB in the end (delta: -40.3MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.61ms. Allocated memory is still 136.3MB. Free memory was 105.3MB in the beginning and 103.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 66.17ms. Allocated memory is still 136.3MB. Free memory was 103.1MB in the beginning and 99.8MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 935.38ms. Allocated memory was 136.3MB in the beginning and 192.9MB in the end (delta: 56.6MB). Free memory was 99.8MB in the beginning and 129.2MB in the end (delta: -29.4MB). Peak memory consumption was 56.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4047.20ms. Allocated memory was 192.9MB in the beginning and 255.9MB in the end (delta: 62.9MB). Free memory was 128.1MB in the beginning and 149.2MB in the end (delta: -21.1MB). Peak memory consumption was 120.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 107]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 108]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 109]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 57 locations, 6 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: 3.9s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 261 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 228 mSDsluCounter, 24 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15 mSDsCounter, 42 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 760 IncrementalHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 42 mSolverCounterUnsat, 9 mSDtfsCounter, 760 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=219occurred in iteration=5, InterpolantAutomatonStates: 30, 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, 0.8s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 329 SizeOfPredicates, 4 NumberOfNonLiveVariables, 493 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 37/42 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 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 16:06:49,714 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