./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_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_73-funloop_hard_racefree.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec 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_73-funloop_hard_racefree.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_73-funloop_hard_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-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:07:30,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:07:30,702 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:07:30,705 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:07:30,705 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:07:30,720 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:07:30,720 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:07:30,721 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:07:30,721 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:07:30,721 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:07:30,722 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:07:30,722 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:07:30,722 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:07:30,723 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:07:30,723 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:07:30,723 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:07:30,724 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:07:30,724 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:07:30,724 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:07:30,724 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:07:30,725 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:07:30,725 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:07:30,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:07:30,726 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:07:30,726 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:07:30,726 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:07:30,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:07:30,727 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:07:30,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:07:30,727 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:07:30,728 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:07:30,728 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:07:30,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:07:30,728 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:07:30,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:07:30,729 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:07:30,729 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:07:30,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:07:30,729 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:07:30,729 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:07:30,730 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:07:30,730 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:07:30,730 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:07:30,730 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:07:30,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:07:30,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:07:30,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:07:30,929 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:07:30,930 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:07:30,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2024-02-07 19:07:32,118 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:07:32,346 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:07:32,347 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2024-02-07 19:07:32,371 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be60b1376/672a9a7cf2144fe1b2a6488de5a52b0e/FLAG2896d0ef2 [2024-02-07 19:07:32,381 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be60b1376/672a9a7cf2144fe1b2a6488de5a52b0e [2024-02-07 19:07:32,387 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:07:32,388 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:07:32,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_73-funloop_hard_racefree.yml/witness.yml [2024-02-07 19:07:32,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:07:32,470 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:07:32,471 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:07:32,471 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:07:32,476 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:07:32,477 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:07:32" (1/2) ... [2024-02-07 19:07:32,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a8d782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:32, skipping insertion in model container [2024-02-07 19:07:32,478 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:07:32" (1/2) ... [2024-02-07 19:07:32,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1b1cd03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:07:32, skipping insertion in model container [2024-02-07 19:07:32,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:07:32" (2/2) ... [2024-02-07 19:07:32,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a8d782 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:32, skipping insertion in model container [2024-02-07 19:07:32,481 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:07:32" (2/2) ... [2024-02-07 19:07:32,481 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:07:32,525 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:07:32,526 INFO L76 edCorrectnessWitness]: Location invariant before [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 19:07:32,526 INFO L76 edCorrectnessWitness]: Location invariant after [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 19:07:32,527 INFO L76 edCorrectnessWitness]: Location invariant before [L946-L946] ((((((((i == 9 || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:32,527 INFO L76 edCorrectnessWitness]: Location invariant before [L958-L958] (((((((((((((((((((((((((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) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:32,527 INFO L76 edCorrectnessWitness]: Location invariant before [L951-L951] ((((((((i == 9 || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:32,528 INFO L76 edCorrectnessWitness]: Location invariant after [L954-L954] ((((((((i == 9 || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:32,528 INFO L76 edCorrectnessWitness]: Location invariant after [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 19:07:32,528 INFO L76 edCorrectnessWitness]: Location invariant before [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 19:07:32,528 INFO L76 edCorrectnessWitness]: Location invariant after [L953-L953] (((((((((((((((((((((((((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) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:32,528 INFO L76 edCorrectnessWitness]: Location invariant after [L946-L946] ((((((((i == 9 || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:32,528 INFO L76 edCorrectnessWitness]: Location invariant before [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 19:07:32,529 INFO L76 edCorrectnessWitness]: Location invariant after [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 19:07:32,529 INFO L76 edCorrectnessWitness]: Location invariant after [L958-L958] (((((((((((((((((((((((((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) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:32,529 INFO L76 edCorrectnessWitness]: Location invariant before [L953-L953] (((((((((((((((((((((((((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) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:32,529 INFO L76 edCorrectnessWitness]: Location invariant before [L954-L954] ((((((((i == 9 || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 19:07:32,572 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:07:32,883 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_73-funloop_hard_racefree.i[41323,41336] [2024-02-07 19:07:32,900 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:07:32,914 INFO L206 MainTranslator]: Completed pre-run [2024-02-07 19:07:32,948 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_73-funloop_hard_racefree.i[41323,41336] 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 19:07:33,086 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:07:33,159 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:07:33,159 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33 WrapperNode [2024-02-07 19:07:33,159 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:07:33,160 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:07:33,160 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:07:33,160 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:07:33,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (1/1) ... [2024-02-07 19:07:33,204 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (1/1) ... [2024-02-07 19:07:33,246 INFO L138 Inliner]: procedures = 272, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 296 [2024-02-07 19:07:33,247 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:07:33,248 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:07:33,248 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:07:33,248 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:07:33,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (1/1) ... [2024-02-07 19:07:33,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (1/1) ... [2024-02-07 19:07:33,281 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (1/1) ... [2024-02-07 19:07:33,311 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 5, 16, 2]. 64 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0]. The 8 writes are split as follows [0, 0, 7, 1]. [2024-02-07 19:07:33,311 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (1/1) ... [2024-02-07 19:07:33,311 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (1/1) ... [2024-02-07 19:07:33,326 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (1/1) ... [2024-02-07 19:07:33,341 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (1/1) ... [2024-02-07 19:07:33,344 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (1/1) ... [2024-02-07 19:07:33,346 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (1/1) ... [2024-02-07 19:07:33,356 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:07:33,357 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:07:33,357 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:07:33,357 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:07:33,358 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (1/1) ... [2024-02-07 19:07:33,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:07:33,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:33,398 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 19:07:33,400 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 19:07:33,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:07:33,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:07:33,455 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 19:07:33,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:07:33,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:07:33,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:07:33,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 19:07:33,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:07:33,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:07:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:07:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 19:07:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 19:07:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:07:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-02-07 19:07:33,456 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-02-07 19:07:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:07:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:07:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:07:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 19:07:33,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:07:33,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:07:33,458 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 19:07:33,614 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:07:33,616 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:07:34,018 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:07:34,019 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:07:34,207 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:07:34,207 INFO L320 CfgBuilder]: Removed 35 assume(true) statements. [2024-02-07 19:07:34,208 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:07:34 BoogieIcfgContainer [2024-02-07 19:07:34,208 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:07:34,212 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:07:34,213 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:07:34,216 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:07:34,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:07:32" (1/4) ... [2024-02-07 19:07:34,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d182c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:07:34, skipping insertion in model container [2024-02-07 19:07:34,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:07:32" (2/4) ... [2024-02-07 19:07:34,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d182c3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:07:34, skipping insertion in model container [2024-02-07 19:07:34,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:07:33" (3/4) ... [2024-02-07 19:07:34,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d182c3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:07:34, skipping insertion in model container [2024-02-07 19:07:34,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:07:34" (4/4) ... [2024-02-07 19:07:34,221 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2024-02-07 19:07:34,236 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:07:34,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-02-07 19:07:34,237 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:07:34,293 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-02-07 19:07:34,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 153 transitions, 313 flow [2024-02-07 19:07:34,403 INFO L124 PetriNetUnfolderBase]: 65/244 cut-off events. [2024-02-07 19:07:34,403 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:07:34,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 244 events. 65/244 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1181 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 142. Up to 8 conditions per place. [2024-02-07 19:07:34,411 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 153 transitions, 313 flow [2024-02-07 19:07:34,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 152 transitions, 311 flow [2024-02-07 19:07:34,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:07:34,437 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;@4d084df3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:07:34,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2024-02-07 19:07:34,440 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:07:34,440 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-02-07 19:07:34,440 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:07:34,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:34,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 19:07:34,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 17 more)] === [2024-02-07 19:07:34,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash 753722, now seen corresponding path program 1 times [2024-02-07 19:07:34,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:34,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919250371] [2024-02-07 19:07:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:34,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:34,648 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 19:07:34,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:34,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919250371] [2024-02-07 19:07:34,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919250371] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:07:34,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:07:34,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:07:34,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96757448] [2024-02-07 19:07:34,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:07:34,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:07:34,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:34,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:07:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:07:34,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 153 [2024-02-07 19:07:34,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 152 transitions, 311 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 19:07:34,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:34,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 153 [2024-02-07 19:07:34,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:35,166 INFO L124 PetriNetUnfolderBase]: 906/2609 cut-off events. [2024-02-07 19:07:35,166 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:07:35,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4324 conditions, 2609 events. 906/2609 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 20356 event pairs, 760 based on Foata normal form. 568/2908 useless extension candidates. Maximal degree in co-relation 4187. Up to 1709 conditions per place. [2024-02-07 19:07:35,182 INFO L140 encePairwiseOnDemand]: 116/153 looper letters, 67 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2024-02-07 19:07:35,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 120 transitions, 385 flow [2024-02-07 19:07:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:07:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:07:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2024-02-07 19:07:35,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5599128540305011 [2024-02-07 19:07:35,202 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 311 flow. Second operand 3 states and 257 transitions. [2024-02-07 19:07:35,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 120 transitions, 385 flow [2024-02-07 19:07:35,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 120 transitions, 385 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:07:35,210 INFO L231 Difference]: Finished difference. Result has 119 places, 120 transitions, 259 flow [2024-02-07 19:07:35,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=119, PETRI_TRANSITIONS=120} [2024-02-07 19:07:35,216 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 3 predicate places. [2024-02-07 19:07:35,217 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 120 transitions, 259 flow [2024-02-07 19:07:35,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 19:07:35,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:35,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-02-07 19:07:35,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:07:35,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 17 more)] === [2024-02-07 19:07:35,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:35,219 INFO L85 PathProgramCache]: Analyzing trace with hash 724354048, now seen corresponding path program 1 times [2024-02-07 19:07:35,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:35,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485688638] [2024-02-07 19:07:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:35,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:35,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:35,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485688638] [2024-02-07 19:07:35,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485688638] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:35,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909679590] [2024-02-07 19:07:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:35,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:35,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:35,495 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 19:07:35,504 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 19:07:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:35,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 19:07:35,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:35,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:07:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:35,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909679590] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:07:35,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:07:35,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2024-02-07 19:07:35,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893572785] [2024-02-07 19:07:35,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:07:35,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:07:35,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:35,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:07:35,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:07:35,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 153 [2024-02-07 19:07:35,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 120 transitions, 259 flow. Second operand has 6 states, 6 states have (on average 51.333333333333336) internal successors, (308), 6 states have internal predecessors, (308), 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 19:07:35,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:35,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 153 [2024-02-07 19:07:35,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:36,310 INFO L124 PetriNetUnfolderBase]: 906/2611 cut-off events. [2024-02-07 19:07:36,310 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:07:36,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4338 conditions, 2611 events. 906/2611 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 20357 event pairs, 760 based on Foata normal form. 2/2345 useless extension candidates. Maximal degree in co-relation 4324. Up to 1706 conditions per place. [2024-02-07 19:07:36,327 INFO L140 encePairwiseOnDemand]: 148/153 looper letters, 67 selfloop transitions, 6 changer transitions 0/123 dead transitions. [2024-02-07 19:07:36,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 411 flow [2024-02-07 19:07:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:07:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:07:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 377 transitions. [2024-02-07 19:07:36,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106753812636166 [2024-02-07 19:07:36,330 INFO L175 Difference]: Start difference. First operand has 119 places, 120 transitions, 259 flow. Second operand 6 states and 377 transitions. [2024-02-07 19:07:36,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 411 flow [2024-02-07 19:07:36,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 123 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:07:36,334 INFO L231 Difference]: Finished difference. Result has 123 places, 121 transitions, 276 flow [2024-02-07 19:07:36,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=276, PETRI_PLACES=123, PETRI_TRANSITIONS=121} [2024-02-07 19:07:36,335 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 7 predicate places. [2024-02-07 19:07:36,335 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 121 transitions, 276 flow [2024-02-07 19:07:36,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.333333333333336) internal successors, (308), 6 states have internal predecessors, (308), 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 19:07:36,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:36,336 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:36,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 19:07:36,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:36,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 17 more)] === [2024-02-07 19:07:36,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:36,554 INFO L85 PathProgramCache]: Analyzing trace with hash 457894796, now seen corresponding path program 1 times [2024-02-07 19:07:36,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:36,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063750096] [2024-02-07 19:07:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:36,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:36,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:36,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063750096] [2024-02-07 19:07:36,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063750096] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:36,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658021076] [2024-02-07 19:07:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:36,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:36,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:36,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:07:36,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 19:07:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:36,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 19:07:36,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:36,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:07:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:36,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658021076] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:07:36,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:07:36,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-02-07 19:07:36,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464965723] [2024-02-07 19:07:36,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:07:36,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 19:07:36,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:36,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 19:07:36,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-02-07 19:07:36,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 153 [2024-02-07 19:07:36,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 121 transitions, 276 flow. Second operand has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 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 19:07:36,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:36,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 153 [2024-02-07 19:07:36,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:37,319 INFO L124 PetriNetUnfolderBase]: 906/2621 cut-off events. [2024-02-07 19:07:37,320 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 19:07:37,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4389 conditions, 2621 events. 906/2621 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 20336 event pairs, 760 based on Foata normal form. 5/2358 useless extension candidates. Maximal degree in co-relation 4309. Up to 1707 conditions per place. [2024-02-07 19:07:37,333 INFO L140 encePairwiseOnDemand]: 149/153 looper letters, 73 selfloop transitions, 10 changer transitions 0/133 dead transitions. [2024-02-07 19:07:37,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 133 transitions, 510 flow [2024-02-07 19:07:37,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:07:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:07:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 588 transitions. [2024-02-07 19:07:37,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843137254901961 [2024-02-07 19:07:37,336 INFO L175 Difference]: Start difference. First operand has 123 places, 121 transitions, 276 flow. Second operand 10 states and 588 transitions. [2024-02-07 19:07:37,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 133 transitions, 510 flow [2024-02-07 19:07:37,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 133 transitions, 488 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-02-07 19:07:37,341 INFO L231 Difference]: Finished difference. Result has 135 places, 127 transitions, 340 flow [2024-02-07 19:07:37,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=340, PETRI_PLACES=135, PETRI_TRANSITIONS=127} [2024-02-07 19:07:37,342 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 19 predicate places. [2024-02-07 19:07:37,342 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 127 transitions, 340 flow [2024-02-07 19:07:37,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 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 19:07:37,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:37,343 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:37,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 19:07:37,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-02-07 19:07:37,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 17 more)] === [2024-02-07 19:07:37,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2064699758, now seen corresponding path program 2 times [2024-02-07 19:07:37,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:37,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498296278] [2024-02-07 19:07:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:37,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:37,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:37,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498296278] [2024-02-07 19:07:37,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498296278] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:37,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105019769] [2024-02-07 19:07:37,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:07:37,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:37,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:37,725 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:07:37,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 19:07:37,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 19:07:37,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:07:37,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-07 19:07:37,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-02-07 19:07:37,853 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 19:07:37,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105019769] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:07:37,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 19:07:37,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 13 [2024-02-07 19:07:37,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004586800] [2024-02-07 19:07:37,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:07:37,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:07:37,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:07:37,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:07:37,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 153 [2024-02-07 19:07:37,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 127 transitions, 340 flow. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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 19:07:37,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:37,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 153 [2024-02-07 19:07:37,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:37,939 INFO L124 PetriNetUnfolderBase]: 63/198 cut-off events. [2024-02-07 19:07:37,940 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-02-07 19:07:37,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 198 events. 63/198 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 711 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 331. Up to 120 conditions per place. [2024-02-07 19:07:37,941 INFO L140 encePairwiseOnDemand]: 149/153 looper letters, 53 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-02-07 19:07:37,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 76 transitions, 345 flow [2024-02-07 19:07:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:07:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:07:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 255 transitions. [2024-02-07 19:07:37,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-02-07 19:07:37,943 INFO L175 Difference]: Start difference. First operand has 135 places, 127 transitions, 340 flow. Second operand 4 states and 255 transitions. [2024-02-07 19:07:37,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 76 transitions, 345 flow [2024-02-07 19:07:37,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:07:37,947 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 193 flow [2024-02-07 19:07:37,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2024-02-07 19:07:37,949 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -49 predicate places. [2024-02-07 19:07:37,949 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 193 flow [2024-02-07 19:07:37,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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 19:07:37,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:37,950 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:37,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 19:07:38,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:38,171 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 17 more)] === [2024-02-07 19:07:38,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash -98397925, now seen corresponding path program 1 times [2024-02-07 19:07:38,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:38,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160034365] [2024-02-07 19:07:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:38,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:07:38,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:38,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160034365] [2024-02-07 19:07:38,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160034365] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:38,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791232213] [2024-02-07 19:07:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:38,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:38,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:38,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:07:38,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 19:07:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:38,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:07:38,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:07:38,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:07:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 19:07:38,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791232213] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:07:38,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:07:38,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-02-07 19:07:38,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633876629] [2024-02-07 19:07:38,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:07:38,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:07:38,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:07:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:07:38,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 153 [2024-02-07 19:07:38,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 193 flow. Second operand has 13 states, 13 states have (on average 52.23076923076923) internal successors, (679), 13 states have internal predecessors, (679), 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 19:07:38,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:38,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 153 [2024-02-07 19:07:38,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:38,625 INFO L124 PetriNetUnfolderBase]: 66/235 cut-off events. [2024-02-07 19:07:38,625 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-02-07 19:07:38,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 235 events. 66/235 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 816 event pairs, 57 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 385. Up to 145 conditions per place. [2024-02-07 19:07:38,626 INFO L140 encePairwiseOnDemand]: 149/153 looper letters, 35 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2024-02-07 19:07:38,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 65 transitions, 359 flow [2024-02-07 19:07:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:07:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:07:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 649 transitions. [2024-02-07 19:07:38,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35348583877995643 [2024-02-07 19:07:38,628 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 193 flow. Second operand 12 states and 649 transitions. [2024-02-07 19:07:38,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 65 transitions, 359 flow [2024-02-07 19:07:38,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 65 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:07:38,631 INFO L231 Difference]: Finished difference. Result has 79 places, 58 transitions, 255 flow [2024-02-07 19:07:38,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=255, PETRI_PLACES=79, PETRI_TRANSITIONS=58} [2024-02-07 19:07:38,633 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -37 predicate places. [2024-02-07 19:07:38,633 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 58 transitions, 255 flow [2024-02-07 19:07:38,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 52.23076923076923) internal successors, (679), 13 states have internal predecessors, (679), 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 19:07:38,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:38,634 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:38,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 19:07:38,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:38,846 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 17 more)] === [2024-02-07 19:07:38,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:38,847 INFO L85 PathProgramCache]: Analyzing trace with hash -96509297, now seen corresponding path program 2 times [2024-02-07 19:07:38,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:38,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260300710] [2024-02-07 19:07:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:38,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:07:38,880 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:07:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:07:38,923 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:07:38,924 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:07:38,924 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (19 of 20 remaining) [2024-02-07 19:07:38,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 20 remaining) [2024-02-07 19:07:38,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 20 remaining) [2024-02-07 19:07:38,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 20 remaining) [2024-02-07 19:07:38,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 20 remaining) [2024-02-07 19:07:38,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 20 remaining) [2024-02-07 19:07:38,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 20 remaining) [2024-02-07 19:07:38,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (12 of 20 remaining) [2024-02-07 19:07:38,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION (11 of 20 remaining) [2024-02-07 19:07:38,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 20 remaining) [2024-02-07 19:07:38,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 20 remaining) [2024-02-07 19:07:38,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 20 remaining) [2024-02-07 19:07:38,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 20 remaining) [2024-02-07 19:07:38,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 20 remaining) [2024-02-07 19:07:38,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONERROR_FUNCTION (5 of 20 remaining) [2024-02-07 19:07:38,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 20 remaining) [2024-02-07 19:07:38,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 20 remaining) [2024-02-07 19:07:38,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 20 remaining) [2024-02-07 19:07:38,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 20 remaining) [2024-02-07 19:07:38,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 20 remaining) [2024-02-07 19:07:38,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:07:38,930 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2024-02-07 19:07:38,931 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:07:38,931 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-07 19:07:38,982 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 19:07:38,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 203 transitions, 422 flow [2024-02-07 19:07:39,005 INFO L124 PetriNetUnfolderBase]: 105/398 cut-off events. [2024-02-07 19:07:39,005 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-07 19:07:39,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 398 events. 105/398 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2173 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 246. Up to 12 conditions per place. [2024-02-07 19:07:39,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 203 transitions, 422 flow [2024-02-07 19:07:39,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 203 transitions, 422 flow [2024-02-07 19:07:39,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:07:39,011 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;@4d084df3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:07:39,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-02-07 19:07:39,011 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:07:39,012 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-02-07 19:07:39,012 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:07:39,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:39,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 19:07:39,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 19:07:39,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash 955301, now seen corresponding path program 1 times [2024-02-07 19:07:39,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:39,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675089012] [2024-02-07 19:07:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:39,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:39,022 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 19:07:39,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:39,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675089012] [2024-02-07 19:07:39,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675089012] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:07:39,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:07:39,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:07:39,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9507667] [2024-02-07 19:07:39,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:07:39,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:07:39,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:39,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:07:39,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:07:39,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 203 [2024-02-07 19:07:39,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 203 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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 19:07:39,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:39,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 203 [2024-02-07 19:07:39,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:44,627 INFO L124 PetriNetUnfolderBase]: 36330/72777 cut-off events. [2024-02-07 19:07:44,628 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-02-07 19:07:44,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125348 conditions, 72777 events. 36330/72777 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 2112. Compared 771356 event pairs, 31673 based on Foata normal form. 17741/82842 useless extension candidates. Maximal degree in co-relation 91460. Up to 52463 conditions per place. [2024-02-07 19:07:45,057 INFO L140 encePairwiseOnDemand]: 155/203 looper letters, 90 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2024-02-07 19:07:45,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 520 flow [2024-02-07 19:07:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:07:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:07:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2024-02-07 19:07:45,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615763546798029 [2024-02-07 19:07:45,059 INFO L175 Difference]: Start difference. First operand has 154 places, 203 transitions, 422 flow. Second operand 3 states and 342 transitions. [2024-02-07 19:07:45,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 520 flow [2024-02-07 19:07:45,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 160 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:07:45,063 INFO L231 Difference]: Finished difference. Result has 157 places, 160 transitions, 348 flow [2024-02-07 19:07:45,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=348, PETRI_PLACES=157, PETRI_TRANSITIONS=160} [2024-02-07 19:07:45,065 INFO L281 CegarLoopForPetriNet]: 154 programPoint places, 3 predicate places. [2024-02-07 19:07:45,066 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 160 transitions, 348 flow [2024-02-07 19:07:45,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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 19:07:45,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:45,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-02-07 19:07:45,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:07:45,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 19:07:45,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash 918077963, now seen corresponding path program 1 times [2024-02-07 19:07:45,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:45,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451023237] [2024-02-07 19:07:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:45,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:45,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:45,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451023237] [2024-02-07 19:07:45,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451023237] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:45,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118846876] [2024-02-07 19:07:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:45,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:45,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:45,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:07:45,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 19:07:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:45,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 19:07:45,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:45,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:07:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:45,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118846876] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:07:45,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:07:45,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2024-02-07 19:07:45,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848971808] [2024-02-07 19:07:45,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:07:45,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:07:45,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:45,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:07:45,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:07:45,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 203 [2024-02-07 19:07:45,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 160 transitions, 348 flow. Second operand has 6 states, 6 states have (on average 68.33333333333333) internal successors, (410), 6 states have internal predecessors, (410), 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 19:07:45,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:45,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 203 [2024-02-07 19:07:45,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:50,640 INFO L124 PetriNetUnfolderBase]: 36330/72779 cut-off events. [2024-02-07 19:07:50,641 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-02-07 19:07:50,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125362 conditions, 72779 events. 36330/72779 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 2112. Compared 771414 event pairs, 31673 based on Foata normal form. 2/65106 useless extension candidates. Maximal degree in co-relation 125347. Up to 52460 conditions per place. [2024-02-07 19:07:51,274 INFO L140 encePairwiseOnDemand]: 198/203 looper letters, 90 selfloop transitions, 6 changer transitions 0/163 dead transitions. [2024-02-07 19:07:51,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 163 transitions, 546 flow [2024-02-07 19:07:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:07:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:07:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 502 transitions. [2024-02-07 19:07:51,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121510673234811 [2024-02-07 19:07:51,277 INFO L175 Difference]: Start difference. First operand has 157 places, 160 transitions, 348 flow. Second operand 6 states and 502 transitions. [2024-02-07 19:07:51,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 163 transitions, 546 flow [2024-02-07 19:07:51,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 163 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:07:51,281 INFO L231 Difference]: Finished difference. Result has 161 places, 161 transitions, 365 flow [2024-02-07 19:07:51,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=365, PETRI_PLACES=161, PETRI_TRANSITIONS=161} [2024-02-07 19:07:51,283 INFO L281 CegarLoopForPetriNet]: 154 programPoint places, 7 predicate places. [2024-02-07 19:07:51,283 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 161 transitions, 365 flow [2024-02-07 19:07:51,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 68.33333333333333) internal successors, (410), 6 states have internal predecessors, (410), 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 19:07:51,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:51,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2024-02-07 19:07:51,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 19:07:51,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:51,495 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 19:07:51,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:07:51,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1192726524, now seen corresponding path program 1 times [2024-02-07 19:07:51,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:07:51,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960306763] [2024-02-07 19:07:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:51,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:07:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:51,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:07:51,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960306763] [2024-02-07 19:07:51,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960306763] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:07:51,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068777489] [2024-02-07 19:07:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:07:51,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:07:51,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:07:51,547 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:07:51,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 19:07:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:07:51,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 19:07:51,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:07:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:51,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:07:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:07:51,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068777489] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:07:51,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:07:51,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-02-07 19:07:51,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301604432] [2024-02-07 19:07:51,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:07:51,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 19:07:51,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:07:51,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 19:07:51,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-02-07 19:07:51,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 203 [2024-02-07 19:07:51,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 161 transitions, 365 flow. Second operand has 11 states, 11 states have (on average 69.0) internal successors, (759), 11 states have internal predecessors, (759), 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 19:07:51,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:07:51,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 203 [2024-02-07 19:07:51,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:07:59,161 INFO L124 PetriNetUnfolderBase]: 36330/72789 cut-off events. [2024-02-07 19:07:59,162 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-02-07 19:07:59,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125413 conditions, 72789 events. 36330/72789 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 2112. Compared 771335 event pairs, 31673 based on Foata normal form. 5/65119 useless extension candidates. Maximal degree in co-relation 125332. Up to 52461 conditions per place. [2024-02-07 19:07:59,970 INFO L140 encePairwiseOnDemand]: 199/203 looper letters, 96 selfloop transitions, 10 changer transitions 0/173 dead transitions. [2024-02-07 19:07:59,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 173 transitions, 645 flow [2024-02-07 19:07:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:07:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:07:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 781 transitions. [2024-02-07 19:07:59,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3847290640394089 [2024-02-07 19:07:59,978 INFO L175 Difference]: Start difference. First operand has 161 places, 161 transitions, 365 flow. Second operand 10 states and 781 transitions. [2024-02-07 19:07:59,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 173 transitions, 645 flow [2024-02-07 19:07:59,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 173 transitions, 623 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-02-07 19:07:59,985 INFO L231 Difference]: Finished difference. Result has 173 places, 167 transitions, 429 flow [2024-02-07 19:07:59,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=429, PETRI_PLACES=173, PETRI_TRANSITIONS=167} [2024-02-07 19:07:59,987 INFO L281 CegarLoopForPetriNet]: 154 programPoint places, 19 predicate places. [2024-02-07 19:07:59,987 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 167 transitions, 429 flow [2024-02-07 19:07:59,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 69.0) internal successors, (759), 11 states have internal predecessors, (759), 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 19:07:59,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:07:59,988 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:00,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 19:08:00,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:08:00,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 19:08:00,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1181889726, now seen corresponding path program 2 times [2024-02-07 19:08:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:00,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4950178] [2024-02-07 19:08:00,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:00,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:08:00,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:00,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4950178] [2024-02-07 19:08:00,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4950178] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:08:00,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398196480] [2024-02-07 19:08:00,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:08:00,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:08:00,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:08:00,485 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:08:00,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 19:08:00,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 19:08:00,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:08:00,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-07 19:08:00,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:08:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-02-07 19:08:00,637 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 19:08:00,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398196480] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:08:00,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 19:08:00,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 13 [2024-02-07 19:08:00,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346225706] [2024-02-07 19:08:00,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:08:00,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:08:00,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:00,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:08:00,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:08:00,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 203 [2024-02-07 19:08:00,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 167 transitions, 429 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 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 19:08:00,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:00,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 203 [2024-02-07 19:08:00,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:06,962 INFO L124 PetriNetUnfolderBase]: 35219/64449 cut-off events. [2024-02-07 19:08:06,963 INFO L125 PetriNetUnfolderBase]: For 523/523 co-relation queries the response was YES. [2024-02-07 19:08:07,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116098 conditions, 64449 events. 35219/64449 cut-off events. For 523/523 co-relation queries the response was YES. Maximal size of possible extension queue 1970. Compared 632161 event pairs, 331 based on Foata normal form. 0/57530 useless extension candidates. Maximal degree in co-relation 116014. Up to 50508 conditions per place. [2024-02-07 19:08:07,466 INFO L140 encePairwiseOnDemand]: 199/203 looper letters, 159 selfloop transitions, 3 changer transitions 0/231 dead transitions. [2024-02-07 19:08:07,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 231 transitions, 881 flow [2024-02-07 19:08:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:08:07,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:08:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 430 transitions. [2024-02-07 19:08:07,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295566502463054 [2024-02-07 19:08:07,471 INFO L175 Difference]: Start difference. First operand has 173 places, 167 transitions, 429 flow. Second operand 4 states and 430 transitions. [2024-02-07 19:08:07,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 231 transitions, 881 flow [2024-02-07 19:08:07,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 231 transitions, 877 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:08:07,497 INFO L231 Difference]: Finished difference. Result has 176 places, 168 transitions, 443 flow [2024-02-07 19:08:07,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=443, PETRI_PLACES=176, PETRI_TRANSITIONS=168} [2024-02-07 19:08:07,499 INFO L281 CegarLoopForPetriNet]: 154 programPoint places, 22 predicate places. [2024-02-07 19:08:07,499 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 168 transitions, 443 flow [2024-02-07 19:08:07,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 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 19:08:07,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:07,500 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:07,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 19:08:07,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:08:07,717 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 19:08:07,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:07,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1501401557, now seen corresponding path program 1 times [2024-02-07 19:08:07,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:07,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754913959] [2024-02-07 19:08:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:07,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 19:08:07,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:07,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754913959] [2024-02-07 19:08:07,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754913959] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:08:07,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311868787] [2024-02-07 19:08:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:07,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:08:07,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:08:08,000 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:08:08,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 19:08:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:08,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:08:08,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:08:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 19:08:08,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:08:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 19:08:08,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311868787] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:08:08,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:08:08,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-02-07 19:08:08,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552444500] [2024-02-07 19:08:08,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:08:08,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:08:08,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:08,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:08:08,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:08:08,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 203 [2024-02-07 19:08:08,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 168 transitions, 443 flow. Second operand has 13 states, 13 states have (on average 69.3076923076923) internal successors, (901), 13 states have internal predecessors, (901), 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 19:08:08,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:08,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 203 [2024-02-07 19:08:08,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:15,844 INFO L124 PetriNetUnfolderBase]: 35537/69555 cut-off events. [2024-02-07 19:08:15,845 INFO L125 PetriNetUnfolderBase]: For 1796/1796 co-relation queries the response was YES. [2024-02-07 19:08:16,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122385 conditions, 69555 events. 35537/69555 cut-off events. For 1796/1796 co-relation queries the response was YES. Maximal size of possible extension queue 2106. Compared 720586 event pairs, 31028 based on Foata normal form. 2/62546 useless extension candidates. Maximal degree in co-relation 122269. Up to 50981 conditions per place. [2024-02-07 19:08:16,357 INFO L140 encePairwiseOnDemand]: 199/203 looper letters, 99 selfloop transitions, 12 changer transitions 0/178 dead transitions. [2024-02-07 19:08:16,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 178 transitions, 737 flow [2024-02-07 19:08:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:08:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:08:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 916 transitions. [2024-02-07 19:08:16,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3760262725779967 [2024-02-07 19:08:16,369 INFO L175 Difference]: Start difference. First operand has 176 places, 168 transitions, 443 flow. Second operand 12 states and 916 transitions. [2024-02-07 19:08:16,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 178 transitions, 737 flow [2024-02-07 19:08:16,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 178 transitions, 735 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:08:16,374 INFO L231 Difference]: Finished difference. Result has 189 places, 171 transitions, 506 flow [2024-02-07 19:08:16,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=506, PETRI_PLACES=189, PETRI_TRANSITIONS=171} [2024-02-07 19:08:16,375 INFO L281 CegarLoopForPetriNet]: 154 programPoint places, 35 predicate places. [2024-02-07 19:08:16,375 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 171 transitions, 506 flow [2024-02-07 19:08:16,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 69.3076923076923) internal successors, (901), 13 states have internal predecessors, (901), 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 19:08:16,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:16,384 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 19:08:16,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-07 19:08:16,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-02-07 19:08:16,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 19:08:16,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash -956293793, now seen corresponding path program 2 times [2024-02-07 19:08:16,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:16,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821217659] [2024-02-07 19:08:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:16,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-02-07 19:08:16,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:16,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821217659] [2024-02-07 19:08:16,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821217659] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:08:16,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126499517] [2024-02-07 19:08:16,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:08:16,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:08:16,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:08:16,702 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:08:16,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-07 19:08:16,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:08:16,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:08:16,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 19:08:16,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:08:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-02-07 19:08:16,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:08:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-02-07 19:08:16,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126499517] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:08:16,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:08:16,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-02-07 19:08:16,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581071449] [2024-02-07 19:08:16,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:08:16,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:08:16,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:16,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:08:16,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:08:16,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 203 [2024-02-07 19:08:16,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 171 transitions, 506 flow. Second operand has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 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 19:08:16,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:16,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 203 [2024-02-07 19:08:16,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:08:17,393 INFO L124 PetriNetUnfolderBase]: 2986/6174 cut-off events. [2024-02-07 19:08:17,393 INFO L125 PetriNetUnfolderBase]: For 1968/1968 co-relation queries the response was YES. [2024-02-07 19:08:17,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11363 conditions, 6174 events. 2986/6174 cut-off events. For 1968/1968 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 46118 event pairs, 930 based on Foata normal form. 800/6525 useless extension candidates. Maximal degree in co-relation 11238. Up to 3600 conditions per place. [2024-02-07 19:08:17,427 INFO L140 encePairwiseOnDemand]: 199/203 looper letters, 118 selfloop transitions, 3 changer transitions 0/160 dead transitions. [2024-02-07 19:08:17,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 160 transitions, 714 flow [2024-02-07 19:08:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:08:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:08:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 454 transitions. [2024-02-07 19:08:17,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44729064039408867 [2024-02-07 19:08:17,429 INFO L175 Difference]: Start difference. First operand has 189 places, 171 transitions, 506 flow. Second operand 5 states and 454 transitions. [2024-02-07 19:08:17,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 160 transitions, 714 flow [2024-02-07 19:08:17,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 160 transitions, 696 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-02-07 19:08:17,433 INFO L231 Difference]: Finished difference. Result has 115 places, 97 transitions, 334 flow [2024-02-07 19:08:17,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=115, PETRI_TRANSITIONS=97} [2024-02-07 19:08:17,434 INFO L281 CegarLoopForPetriNet]: 154 programPoint places, -39 predicate places. [2024-02-07 19:08:17,434 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 97 transitions, 334 flow [2024-02-07 19:08:17,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 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 19:08:17,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:17,434 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 3, 2, 2, 1, 1, 1, 1, 1] [2024-02-07 19:08:17,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-07 19:08:17,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:08:17,647 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 19:08:17,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash 124698204, now seen corresponding path program 1 times [2024-02-07 19:08:17,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:17,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476442325] [2024-02-07 19:08:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:17,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:08:17,676 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:08:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:08:17,709 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:08:17,710 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:08:17,710 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2024-02-07 19:08:17,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 25 remaining) [2024-02-07 19:08:17,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 25 remaining) [2024-02-07 19:08:17,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 25 remaining) [2024-02-07 19:08:17,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 25 remaining) [2024-02-07 19:08:17,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 25 remaining) [2024-02-07 19:08:17,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 25 remaining) [2024-02-07 19:08:17,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (17 of 25 remaining) [2024-02-07 19:08:17,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION (16 of 25 remaining) [2024-02-07 19:08:17,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 25 remaining) [2024-02-07 19:08:17,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 25 remaining) [2024-02-07 19:08:17,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 25 remaining) [2024-02-07 19:08:17,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 25 remaining) [2024-02-07 19:08:17,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 25 remaining) [2024-02-07 19:08:17,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONERROR_FUNCTION (10 of 25 remaining) [2024-02-07 19:08:17,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 25 remaining) [2024-02-07 19:08:17,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 25 remaining) [2024-02-07 19:08:17,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 25 remaining) [2024-02-07 19:08:17,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 25 remaining) [2024-02-07 19:08:17,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONERROR_FUNCTION (5 of 25 remaining) [2024-02-07 19:08:17,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 25 remaining) [2024-02-07 19:08:17,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 25 remaining) [2024-02-07 19:08:17,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 25 remaining) [2024-02-07 19:08:17,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 25 remaining) [2024-02-07 19:08:17,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 25 remaining) [2024-02-07 19:08:17,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 19:08:17,713 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-02-07 19:08:17,714 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:08:17,714 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-07 19:08:17,776 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-07 19:08:17,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 253 transitions, 533 flow [2024-02-07 19:08:18,025 INFO L124 PetriNetUnfolderBase]: 148/567 cut-off events. [2024-02-07 19:08:18,026 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-02-07 19:08:18,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 567 events. 148/567 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3268 event pairs, 1 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 407. Up to 16 conditions per place. [2024-02-07 19:08:18,030 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 253 transitions, 533 flow [2024-02-07 19:08:18,035 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 253 transitions, 533 flow [2024-02-07 19:08:18,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:08:18,036 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;@4d084df3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:08:18,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-02-07 19:08:18,037 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:08:18,046 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-02-07 19:08:18,046 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:08:18,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:08:18,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 19:08:18,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 27 more)] === [2024-02-07 19:08:18,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:08:18,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1206530, now seen corresponding path program 1 times [2024-02-07 19:08:18,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:08:18,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391194678] [2024-02-07 19:08:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:08:18,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:08:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:08:18,077 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 19:08:18,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:08:18,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391194678] [2024-02-07 19:08:18,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391194678] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:08:18,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:08:18,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:08:18,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318834931] [2024-02-07 19:08:18,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:08:18,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:08:18,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:08:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:08:18,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:08:18,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 253 [2024-02-07 19:08:18,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 253 transitions, 533 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 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 19:08:18,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:08:18,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 253 [2024-02-07 19:08:18,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand