./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_12-ptr_racefree.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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/goblint-regression/28-race_reach_12-ptr_racefree.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_12-ptr_racefree.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 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:26:51,642 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:26:51,706 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:26:51,710 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:26:51,711 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:26:51,742 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:26:51,743 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:26:51,743 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:26:51,744 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:26:51,747 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:26:51,747 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:26:51,747 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:26:51,748 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:26:51,750 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:26:51,750 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:26:51,750 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:26:51,750 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:26:51,750 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:26:51,751 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:26:51,751 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:26:51,752 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:26:51,752 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:26:51,753 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:26:51,753 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:26:51,753 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:26:51,753 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:26:51,754 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:26:51,754 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:26:51,754 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:26:51,754 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:26:51,755 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:26:51,755 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:26:51,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:26:51,755 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:26:51,755 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:26:51,756 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:26:51,756 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:26:51,756 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:26:51,756 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:26:51,756 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:26:51,756 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:26:51,757 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:26:51,757 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:26:51,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:26:51,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:26:51,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:26:51,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:26:51,963 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:26:51,964 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:26:51,965 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_12-ptr_racefree.yml/witness.yml [2024-02-07 14:26:52,047 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:26:52,048 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:26:52,048 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2024-02-07 14:26:53,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:26:53,297 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:26:53,298 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2024-02-07 14:26:53,310 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9352b76dd/b561af6a89434f61ba9d6aa134a412d9/FLAGcf213d379 [2024-02-07 14:26:53,324 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9352b76dd/b561af6a89434f61ba9d6aa134a412d9 [2024-02-07 14:26:53,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:26:53,325 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:26:53,326 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:26:53,326 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:26:53,330 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:26:53,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:26:52" (1/2) ... [2024-02-07 14:26:53,331 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fdf665 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:53, skipping insertion in model container [2024-02-07 14:26:53,331 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:26:52" (1/2) ... [2024-02-07 14:26:53,332 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e442499 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:53, skipping insertion in model container [2024-02-07 14:26:53,332 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:26:53" (2/2) ... [2024-02-07 14:26:53,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fdf665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53, skipping insertion in model container [2024-02-07 14:26:53,333 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:26:53" (2/2) ... [2024-02-07 14:26:53,333 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:26:53,366 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:26:53,367 INFO L76 edCorrectnessWitness]: Location invariant before [L703-L703] p == & global [2024-02-07 14:26:53,368 INFO L76 edCorrectnessWitness]: Location invariant after [L703-L703] ((global == 1) && (p == & global)) && (*p == 1) [2024-02-07 14:26:53,368 INFO L76 edCorrectnessWitness]: Location invariant after [L703-L703] ((global == 0) && (p == & global)) && (*p == 0) [2024-02-07 14:26:53,368 INFO L76 edCorrectnessWitness]: Location invariant after [L710-L710] global == 0 [2024-02-07 14:26:53,368 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] (((0 <= *p) && (*p <= 1)) && (p == & global)) && (*p == 0 || *p == 1) [2024-02-07 14:26:53,368 INFO L76 edCorrectnessWitness]: Location invariant after [L712-L712] ((((((((((((((((((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6 [2024-02-07 14:26:53,368 INFO L76 edCorrectnessWitness]: Location invariant before [L704-L704] p == & global [2024-02-07 14:26:53,368 INFO L76 edCorrectnessWitness]: Location invariant before [L703-L703] p == & global [2024-02-07 14:26:53,369 INFO L76 edCorrectnessWitness]: Location invariant after [L708-L708] ((((((((((((((((((((((((i == 19 || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20 [2024-02-07 14:26:53,369 INFO L76 edCorrectnessWitness]: Location invariant after [L703-L703] (global == 0) && (p == & global) [2024-02-07 14:26:53,369 INFO L76 edCorrectnessWitness]: Location invariant before [L703-L703] ((global == 1) && (p == & global)) && (*p == 1) [2024-02-07 14:26:53,369 INFO L76 edCorrectnessWitness]: Location invariant before [L705-L705] p == & global [2024-02-07 14:26:53,369 INFO L76 edCorrectnessWitness]: Location invariant before [L703-L703] ((global == 0) && (p == & global)) && (*p == 0) [2024-02-07 14:26:53,369 INFO L76 edCorrectnessWitness]: Location invariant after [L703-L703] (global == 1) && (p == & global) [2024-02-07 14:26:53,369 INFO L76 edCorrectnessWitness]: Location invariant before [L703-L703] (global == 0) && (p == & global) [2024-02-07 14:26:53,370 INFO L76 edCorrectnessWitness]: Location invariant before [L712-L712] ((((((((((((((((((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6 [2024-02-07 14:26:53,370 INFO L76 edCorrectnessWitness]: Location invariant before [L703-L703] (global == 1) && (p == & global) [2024-02-07 14:26:53,370 INFO L76 edCorrectnessWitness]: Location invariant before [L710-L710] global == 0 [2024-02-07 14:26:53,370 INFO L76 edCorrectnessWitness]: Location invariant before [L708-L708] ((((((((((((((((((((((((i == 19 || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20 [2024-02-07 14:26:53,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:26:53,691 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2024-02-07 14:26:53,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:26:53,720 INFO L203 MainTranslator]: Completed pre-run [2024-02-07 14:26:53,742 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:26:53,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:26:53,913 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:26:53,914 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53 WrapperNode [2024-02-07 14:26:53,914 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:26:53,915 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:26:53,915 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:26:53,915 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:26:53,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (1/1) ... [2024-02-07 14:26:53,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (1/1) ... [2024-02-07 14:26:53,950 INFO L138 Inliner]: procedures = 171, calls = 53, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2024-02-07 14:26:53,951 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:26:53,951 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:26:53,952 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:26:53,952 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:26:53,960 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (1/1) ... [2024-02-07 14:26:53,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (1/1) ... [2024-02-07 14:26:53,963 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (1/1) ... [2024-02-07 14:26:53,974 INFO L175 MemorySlicer]: Split 31 memory accesses to 5 slices as follows [2, 5, 5, 2, 17]. 55 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 5, 0, 1]. The 3 writes are split as follows [0, 0, 0, 1, 2]. [2024-02-07 14:26:53,975 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (1/1) ... [2024-02-07 14:26:53,975 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (1/1) ... [2024-02-07 14:26:53,982 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (1/1) ... [2024-02-07 14:26:53,985 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (1/1) ... [2024-02-07 14:26:53,986 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (1/1) ... [2024-02-07 14:26:53,987 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (1/1) ... [2024-02-07 14:26:53,990 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:26:53,991 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:26:53,991 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:26:53,991 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:26:53,992 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (1/1) ... [2024-02-07 14:26:54,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:26:54,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:26:54,025 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) [2024-02-07 14:26:54,032 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 [2024-02-07 14:26:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:26:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:26:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:26:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:26:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 14:26:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:26:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:26:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:26:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:26:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 14:26:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 14:26:54,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:26:54,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:26:54,070 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-02-07 14:26:54,070 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-02-07 14:26:54,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:26:54,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:26:54,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:26:54,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:26:54,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:26:54,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 14:26:54,071 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 14:26:54,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:26:54,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:26:54,073 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:26:54,183 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:26:54,185 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:26:54,524 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:26:54,525 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:26:54,663 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:26:54,663 INFO L320 CfgBuilder]: Removed 10 assume(true) statements. [2024-02-07 14:26:54,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:26:54 BoogieIcfgContainer [2024-02-07 14:26:54,664 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:26:54,666 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:26:54,667 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:26:54,669 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:26:54,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:26:52" (1/4) ... [2024-02-07 14:26:54,671 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5e8881 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:26:54, skipping insertion in model container [2024-02-07 14:26:54,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:26:53" (2/4) ... [2024-02-07 14:26:54,671 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5e8881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:26:54, skipping insertion in model container [2024-02-07 14:26:54,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:53" (3/4) ... [2024-02-07 14:26:54,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5e8881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:26:54, skipping insertion in model container [2024-02-07 14:26:54,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:26:54" (4/4) ... [2024-02-07 14:26:54,674 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2024-02-07 14:26:54,689 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:26:54,689 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-02-07 14:26:54,689 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:26:54,765 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-02-07 14:26:54,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 73 transitions, 153 flow [2024-02-07 14:26:54,837 INFO L124 PetriNetUnfolderBase]: 13/95 cut-off events. [2024-02-07 14:26:54,837 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:26:54,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 95 events. 13/95 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 347 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2024-02-07 14:26:54,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 73 transitions, 153 flow [2024-02-07 14:26:54,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 72 transitions, 151 flow [2024-02-07 14:26:54,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:26:54,854 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;@10767dba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:26:54,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2024-02-07 14:26:54,858 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:26:54,859 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-07 14:26:54,859 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:26:54,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:54,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:26:54,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2024-02-07 14:26:54,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:54,864 INFO L85 PathProgramCache]: Analyzing trace with hash 420095260, now seen corresponding path program 1 times [2024-02-07 14:26:54,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:54,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758137563] [2024-02-07 14:26:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:54,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:55,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:55,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758137563] [2024-02-07 14:26:55,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758137563] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:55,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:55,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:26:55,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262095873] [2024-02-07 14:26:55,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:55,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:26:55,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:55,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:26:55,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:26:55,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 73 [2024-02-07 14:26:55,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 72 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:55,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:55,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 73 [2024-02-07 14:26:55,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:26:55,330 INFO L124 PetriNetUnfolderBase]: 48/188 cut-off events. [2024-02-07 14:26:55,330 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:26:55,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 188 events. 48/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 581 event pairs, 24 based on Foata normal form. 24/202 useless extension candidates. Maximal degree in co-relation 294. Up to 99 conditions per place. [2024-02-07 14:26:55,334 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 36 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-02-07 14:26:55,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 196 flow [2024-02-07 14:26:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:26:55,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:26:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 169 transitions. [2024-02-07 14:26:55,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787671232876712 [2024-02-07 14:26:55,350 INFO L175 Difference]: Start difference. First operand has 66 places, 72 transitions, 151 flow. Second operand 4 states and 169 transitions. [2024-02-07 14:26:55,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 196 flow [2024-02-07 14:26:55,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:26:55,358 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 90 flow [2024-02-07 14:26:55,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-02-07 14:26:55,363 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -19 predicate places. [2024-02-07 14:26:55,363 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 90 flow [2024-02-07 14:26:55,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:55,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:55,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:26:55,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:26:55,364 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2024-02-07 14:26:55,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:55,365 INFO L85 PathProgramCache]: Analyzing trace with hash 420097420, now seen corresponding path program 1 times [2024-02-07 14:26:55,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:55,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157846510] [2024-02-07 14:26:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:55,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:55,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:55,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157846510] [2024-02-07 14:26:55,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157846510] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:55,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:55,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:26:55,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643498313] [2024-02-07 14:26:55,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:55,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:26:55,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:55,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:26:55,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:26:55,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 73 [2024-02-07 14:26:55,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2024-02-07 14:26:55,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:55,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 73 [2024-02-07 14:26:55,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:26:55,644 INFO L124 PetriNetUnfolderBase]: 60/204 cut-off events. [2024-02-07 14:26:55,645 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-02-07 14:26:55,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 204 events. 60/204 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 594 event pairs, 18 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 363. Up to 92 conditions per place. [2024-02-07 14:26:55,648 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 27 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-02-07 14:26:55,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 166 flow [2024-02-07 14:26:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:26:55,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:26:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-02-07 14:26:55,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4520547945205479 [2024-02-07 14:26:55,653 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 90 flow. Second operand 4 states and 132 transitions. [2024-02-07 14:26:55,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 166 flow [2024-02-07 14:26:55,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 161 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:26:55,655 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 93 flow [2024-02-07 14:26:55,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-02-07 14:26:55,656 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -19 predicate places. [2024-02-07 14:26:55,656 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 93 flow [2024-02-07 14:26:55,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2024-02-07 14:26:55,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:55,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-07 14:26:55,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:26:55,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2024-02-07 14:26:55,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:55,659 INFO L85 PathProgramCache]: Analyzing trace with hash -15365713, now seen corresponding path program 1 times [2024-02-07 14:26:55,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:55,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501403999] [2024-02-07 14:26:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:55,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:26:55,685 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:26:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:26:55,716 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:26:55,732 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:26:55,733 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (22 of 23 remaining) [2024-02-07 14:26:55,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 23 remaining) [2024-02-07 14:26:55,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 23 remaining) [2024-02-07 14:26:55,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (19 of 23 remaining) [2024-02-07 14:26:55,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 23 remaining) [2024-02-07 14:26:55,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 23 remaining) [2024-02-07 14:26:55,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 23 remaining) [2024-02-07 14:26:55,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 23 remaining) [2024-02-07 14:26:55,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 23 remaining) [2024-02-07 14:26:55,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 23 remaining) [2024-02-07 14:26:55,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 23 remaining) [2024-02-07 14:26:55,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 23 remaining) [2024-02-07 14:26:55,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 23 remaining) [2024-02-07 14:26:55,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 23 remaining) [2024-02-07 14:26:55,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 23 remaining) [2024-02-07 14:26:55,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 23 remaining) [2024-02-07 14:26:55,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 23 remaining) [2024-02-07 14:26:55,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 23 remaining) [2024-02-07 14:26:55,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 23 remaining) [2024-02-07 14:26:55,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 23 remaining) [2024-02-07 14:26:55,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 23 remaining) [2024-02-07 14:26:55,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 23 remaining) [2024-02-07 14:26:55,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 23 remaining) [2024-02-07 14:26:55,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:26:55,739 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-02-07 14:26:55,740 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:26:55,741 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-07 14:26:55,762 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:26:55,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 116 transitions, 248 flow [2024-02-07 14:26:55,776 INFO L124 PetriNetUnfolderBase]: 24/173 cut-off events. [2024-02-07 14:26:55,776 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-07 14:26:55,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 173 events. 24/173 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 787 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2024-02-07 14:26:55,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 116 transitions, 248 flow [2024-02-07 14:26:55,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 116 transitions, 248 flow [2024-02-07 14:26:55,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:26:55,782 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;@10767dba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:26:55,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2024-02-07 14:26:55,783 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:26:55,783 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-07 14:26:55,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:26:55,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:55,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:26:55,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 29 more)] === [2024-02-07 14:26:55,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:55,784 INFO L85 PathProgramCache]: Analyzing trace with hash 530836201, now seen corresponding path program 1 times [2024-02-07 14:26:55,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:55,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310199240] [2024-02-07 14:26:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:55,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:55,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:55,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310199240] [2024-02-07 14:26:55,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310199240] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:55,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:55,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:26:55,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909302499] [2024-02-07 14:26:55,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:55,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:26:55,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:26:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:26:55,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 116 [2024-02-07 14:26:55,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 116 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 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) [2024-02-07 14:26:55,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:55,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 116 [2024-02-07 14:26:55,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:26:57,770 INFO L124 PetriNetUnfolderBase]: 10068/22161 cut-off events. [2024-02-07 14:26:57,770 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2024-02-07 14:26:57,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38090 conditions, 22161 events. 10068/22161 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 206002 event pairs, 3130 based on Foata normal form. 3666/23661 useless extension candidates. Maximal degree in co-relation 27492. Up to 13235 conditions per place. [2024-02-07 14:26:57,876 INFO L140 encePairwiseOnDemand]: 95/116 looper letters, 126 selfloop transitions, 7 changer transitions 0/177 dead transitions. [2024-02-07 14:26:57,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 177 transitions, 649 flow [2024-02-07 14:26:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:26:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:26:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 389 transitions. [2024-02-07 14:26:57,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6706896551724137 [2024-02-07 14:26:57,879 INFO L175 Difference]: Start difference. First operand has 104 places, 116 transitions, 248 flow. Second operand 5 states and 389 transitions. [2024-02-07 14:26:57,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 177 transitions, 649 flow [2024-02-07 14:26:57,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 177 transitions, 649 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:26:57,882 INFO L231 Difference]: Finished difference. Result has 111 places, 107 transitions, 266 flow [2024-02-07 14:26:57,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=111, PETRI_TRANSITIONS=107} [2024-02-07 14:26:57,883 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 7 predicate places. [2024-02-07 14:26:57,883 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 107 transitions, 266 flow [2024-02-07 14:26:57,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 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) [2024-02-07 14:26:57,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:57,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:26:57,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:26:57,884 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 29 more)] === [2024-02-07 14:26:57,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:57,885 INFO L85 PathProgramCache]: Analyzing trace with hash 530834041, now seen corresponding path program 1 times [2024-02-07 14:26:57,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:57,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809995701] [2024-02-07 14:26:57,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:57,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:57,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:57,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809995701] [2024-02-07 14:26:57,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809995701] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:57,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:57,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:26:57,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295581456] [2024-02-07 14:26:57,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:57,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:26:57,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:26:57,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:26:57,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 116 [2024-02-07 14:26:57,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 107 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 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) [2024-02-07 14:26:57,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:57,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 116 [2024-02-07 14:26:57,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:26:59,279 INFO L124 PetriNetUnfolderBase]: 8377/18032 cut-off events. [2024-02-07 14:26:59,280 INFO L125 PetriNetUnfolderBase]: For 1633/1633 co-relation queries the response was YES. [2024-02-07 14:26:59,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33057 conditions, 18032 events. 8377/18032 cut-off events. For 1633/1633 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 160627 event pairs, 2983 based on Foata normal form. 0/16345 useless extension candidates. Maximal degree in co-relation 31580. Up to 12415 conditions per place. [2024-02-07 14:26:59,374 INFO L140 encePairwiseOnDemand]: 112/116 looper letters, 114 selfloop transitions, 3 changer transitions 0/165 dead transitions. [2024-02-07 14:26:59,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 165 transitions, 656 flow [2024-02-07 14:26:59,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:26:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:26:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 300 transitions. [2024-02-07 14:26:59,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646551724137931 [2024-02-07 14:26:59,377 INFO L175 Difference]: Start difference. First operand has 111 places, 107 transitions, 266 flow. Second operand 4 states and 300 transitions. [2024-02-07 14:26:59,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 165 transitions, 656 flow [2024-02-07 14:26:59,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 165 transitions, 656 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:26:59,384 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 284 flow [2024-02-07 14:26:59,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2024-02-07 14:26:59,386 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 12 predicate places. [2024-02-07 14:26:59,386 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 284 flow [2024-02-07 14:26:59,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 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) [2024-02-07 14:26:59,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:59,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:26:59,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:26:59,387 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 29 more)] === [2024-02-07 14:26:59,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:59,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2054319793, now seen corresponding path program 1 times [2024-02-07 14:26:59,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:59,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770155144] [2024-02-07 14:26:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:59,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:59,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:59,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770155144] [2024-02-07 14:26:59,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770155144] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:59,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:59,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:26:59,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318299492] [2024-02-07 14:26:59,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:59,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:26:59,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:59,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:26:59,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:26:59,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 116 [2024-02-07 14:26:59,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2024-02-07 14:26:59,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:59,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 116 [2024-02-07 14:26:59,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:27:01,217 INFO L124 PetriNetUnfolderBase]: 9176/19457 cut-off events. [2024-02-07 14:27:01,217 INFO L125 PetriNetUnfolderBase]: For 2876/2876 co-relation queries the response was YES. [2024-02-07 14:27:01,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37137 conditions, 19457 events. 9176/19457 cut-off events. For 2876/2876 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 169712 event pairs, 5693 based on Foata normal form. 0/18299 useless extension candidates. Maximal degree in co-relation 36250. Up to 13896 conditions per place. [2024-02-07 14:27:01,333 INFO L140 encePairwiseOnDemand]: 111/116 looper letters, 94 selfloop transitions, 2 changer transitions 0/138 dead transitions. [2024-02-07 14:27:01,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 138 transitions, 558 flow [2024-02-07 14:27:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:27:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:27:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2024-02-07 14:27:01,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6264367816091954 [2024-02-07 14:27:01,334 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 284 flow. Second operand 3 states and 218 transitions. [2024-02-07 14:27:01,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 138 transitions, 558 flow [2024-02-07 14:27:01,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 138 transitions, 555 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:27:01,339 INFO L231 Difference]: Finished difference. Result has 113 places, 104 transitions, 278 flow [2024-02-07 14:27:01,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=113, PETRI_TRANSITIONS=104} [2024-02-07 14:27:01,340 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 9 predicate places. [2024-02-07 14:27:01,340 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 104 transitions, 278 flow [2024-02-07 14:27:01,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2024-02-07 14:27:01,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:27:01,341 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:27:01,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:27:01,341 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 29 more)] === [2024-02-07 14:27:01,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:27:01,341 INFO L85 PathProgramCache]: Analyzing trace with hash 245562648, now seen corresponding path program 1 times [2024-02-07 14:27:01,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:27:01,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914099903] [2024-02-07 14:27:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:27:01,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:27:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:27:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:27:01,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:27:01,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914099903] [2024-02-07 14:27:01,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914099903] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:27:01,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:27:01,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:27:01,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237491611] [2024-02-07 14:27:01,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:27:01,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:27:01,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:27:01,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:27:01,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:27:01,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 116 [2024-02-07 14:27:01,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 104 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 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) [2024-02-07 14:27:01,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:27:01,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 116 [2024-02-07 14:27:01,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:27:03,071 INFO L124 PetriNetUnfolderBase]: 10217/20772 cut-off events. [2024-02-07 14:27:03,071 INFO L125 PetriNetUnfolderBase]: For 4063/4063 co-relation queries the response was YES. [2024-02-07 14:27:03,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40357 conditions, 20772 events. 10217/20772 cut-off events. For 4063/4063 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 179778 event pairs, 3245 based on Foata normal form. 0/19715 useless extension candidates. Maximal degree in co-relation 38621. Up to 13542 conditions per place. [2024-02-07 14:27:03,194 INFO L140 encePairwiseOnDemand]: 110/116 looper letters, 128 selfloop transitions, 8 changer transitions 0/176 dead transitions. [2024-02-07 14:27:03,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 176 transitions, 737 flow [2024-02-07 14:27:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:27:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:27:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 354 transitions. [2024-02-07 14:27:03,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6103448275862069 [2024-02-07 14:27:03,196 INFO L175 Difference]: Start difference. First operand has 113 places, 104 transitions, 278 flow. Second operand 5 states and 354 transitions. [2024-02-07 14:27:03,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 176 transitions, 737 flow [2024-02-07 14:27:03,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 176 transitions, 734 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:27:03,203 INFO L231 Difference]: Finished difference. Result has 119 places, 108 transitions, 322 flow [2024-02-07 14:27:03,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=119, PETRI_TRANSITIONS=108} [2024-02-07 14:27:03,205 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 15 predicate places. [2024-02-07 14:27:03,205 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 108 transitions, 322 flow [2024-02-07 14:27:03,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 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) [2024-02-07 14:27:03,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:27:03,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-02-07 14:27:03,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:27:03,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 29 more)] === [2024-02-07 14:27:03,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:27:03,208 INFO L85 PathProgramCache]: Analyzing trace with hash 245559176, now seen corresponding path program 1 times [2024-02-07 14:27:03,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:27:03,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904448744] [2024-02-07 14:27:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:27:03,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:27:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:27:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:27:03,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:27:03,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904448744] [2024-02-07 14:27:03,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904448744] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:27:03,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858625752] [2024-02-07 14:27:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:27:03,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:27:03,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:27:03,290 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) [2024-02-07 14:27:03,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:27:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:27:03,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 14:27:03,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:27:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:27:03,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:27:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:27:03,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858625752] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:27:03,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:27:03,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-02-07 14:27:03,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994708121] [2024-02-07 14:27:03,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:27:03,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:27:03,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:27:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:27:03,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:27:03,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 116 [2024-02-07 14:27:03,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 108 transitions, 322 flow. Second operand has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:27:03,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:27:03,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 116 [2024-02-07 14:27:03,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:27:03,789 INFO L124 PetriNetUnfolderBase]: 2084/4069 cut-off events. [2024-02-07 14:27:03,789 INFO L125 PetriNetUnfolderBase]: For 1780/1780 co-relation queries the response was YES. [2024-02-07 14:27:03,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8846 conditions, 4069 events. 2084/4069 cut-off events. For 1780/1780 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 26975 event pairs, 139 based on Foata normal form. 618/4520 useless extension candidates. Maximal degree in co-relation 8479. Up to 2673 conditions per place. [2024-02-07 14:27:03,809 INFO L140 encePairwiseOnDemand]: 112/116 looper letters, 107 selfloop transitions, 3 changer transitions 0/145 dead transitions. [2024-02-07 14:27:03,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 145 transitions, 681 flow [2024-02-07 14:27:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:27:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:27:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 332 transitions. [2024-02-07 14:27:03,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5724137931034483 [2024-02-07 14:27:03,811 INFO L175 Difference]: Start difference. First operand has 119 places, 108 transitions, 322 flow. Second operand 5 states and 332 transitions. [2024-02-07 14:27:03,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 145 transitions, 681 flow [2024-02-07 14:27:03,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 145 transitions, 677 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:27:03,815 INFO L231 Difference]: Finished difference. Result has 99 places, 84 transitions, 264 flow [2024-02-07 14:27:03,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=99, PETRI_TRANSITIONS=84} [2024-02-07 14:27:03,816 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -5 predicate places. [2024-02-07 14:27:03,816 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 84 transitions, 264 flow [2024-02-07 14:27:03,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:27:03,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:27:03,817 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2024-02-07 14:27:03,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-07 14:27:04,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:27:04,030 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 29 more)] === [2024-02-07 14:27:04,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:27:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash -240814140, now seen corresponding path program 1 times [2024-02-07 14:27:04,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:27:04,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488109618] [2024-02-07 14:27:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:27:04,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:27:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:27:04,059 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:27:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:27:04,069 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:27:04,069 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:27:04,069 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (31 of 32 remaining) [2024-02-07 14:27:04,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 32 remaining) [2024-02-07 14:27:04,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 32 remaining) [2024-02-07 14:27:04,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (28 of 32 remaining) [2024-02-07 14:27:04,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 32 remaining) [2024-02-07 14:27:04,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 32 remaining) [2024-02-07 14:27:04,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 32 remaining) [2024-02-07 14:27:04,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 32 remaining) [2024-02-07 14:27:04,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 32 remaining) [2024-02-07 14:27:04,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 32 remaining) [2024-02-07 14:27:04,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 32 remaining) [2024-02-07 14:27:04,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 32 remaining) [2024-02-07 14:27:04,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 32 remaining) [2024-02-07 14:27:04,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 32 remaining) [2024-02-07 14:27:04,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 32 remaining) [2024-02-07 14:27:04,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 32 remaining) [2024-02-07 14:27:04,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 32 remaining) [2024-02-07 14:27:04,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 32 remaining) [2024-02-07 14:27:04,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 32 remaining) [2024-02-07 14:27:04,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 32 remaining) [2024-02-07 14:27:04,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 32 remaining) [2024-02-07 14:27:04,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 32 remaining) [2024-02-07 14:27:04,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 32 remaining) [2024-02-07 14:27:04,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 32 remaining) [2024-02-07 14:27:04,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 32 remaining) [2024-02-07 14:27:04,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 32 remaining) [2024-02-07 14:27:04,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 32 remaining) [2024-02-07 14:27:04,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 32 remaining) [2024-02-07 14:27:04,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 32 remaining) [2024-02-07 14:27:04,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 32 remaining) [2024-02-07 14:27:04,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 32 remaining) [2024-02-07 14:27:04,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 32 remaining) [2024-02-07 14:27:04,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 14:27:04,074 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-02-07 14:27:04,074 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:27:04,074 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-07 14:27:04,101 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-07 14:27:04,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 159 transitions, 345 flow [2024-02-07 14:27:04,150 INFO L124 PetriNetUnfolderBase]: 38/266 cut-off events. [2024-02-07 14:27:04,150 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2024-02-07 14:27:04,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 266 events. 38/266 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1345 event pairs, 1 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 186. Up to 12 conditions per place. [2024-02-07 14:27:04,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 159 transitions, 345 flow [2024-02-07 14:27:04,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 159 transitions, 345 flow [2024-02-07 14:27:04,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:27:04,155 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;@10767dba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:27:04,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2024-02-07 14:27:04,156 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:27:04,156 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-07 14:27:04,156 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:27:04,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:27:04,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:27:04,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 38 more)] === [2024-02-07 14:27:04,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:27:04,157 INFO L85 PathProgramCache]: Analyzing trace with hash 682612721, now seen corresponding path program 1 times [2024-02-07 14:27:04,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:27:04,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182050445] [2024-02-07 14:27:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:27:04,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:27:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:27:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:27:04,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:27:04,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182050445] [2024-02-07 14:27:04,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182050445] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:27:04,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:27:04,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:27:04,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625280603] [2024-02-07 14:27:04,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:27:04,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:27:04,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:27:04,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:27:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:27:04,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2024-02-07 14:27:04,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 159 transitions, 345 flow. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 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) [2024-02-07 14:27:04,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:27:04,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2024-02-07 14:27:04,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand