./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8857f20b 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/pthread/stack_longest-2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-8857f20-m [2024-01-29 22:49:51,510 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-29 22:49:51,574 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-29 22:49:51,597 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-29 22:49:51,598 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-29 22:49:51,638 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-29 22:49:51,639 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-29 22:49:51,639 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-29 22:49:51,639 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-29 22:49:51,643 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-29 22:49:51,643 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-29 22:49:51,643 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-29 22:49:51,644 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-29 22:49:51,645 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-29 22:49:51,645 INFO L153 SettingsManager]: * Use SBE=true [2024-01-29 22:49:51,646 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-29 22:49:51,646 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-29 22:49:51,646 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-29 22:49:51,646 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-29 22:49:51,646 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-29 22:49:51,647 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-29 22:49:51,647 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-29 22:49:51,647 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-29 22:49:51,647 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-29 22:49:51,648 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-29 22:49:51,648 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-29 22:49:51,648 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-29 22:49:51,648 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-29 22:49:51,649 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-29 22:49:51,649 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-29 22:49:51,650 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-29 22:49:51,650 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-29 22:49:51,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-29 22:49:51,650 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-29 22:49:51,651 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-29 22:49:51,651 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-29 22:49:51,651 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-29 22:49:51,652 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-29 22:49:51,652 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-29 22:49:51,652 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-29 22:49:51,653 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-29 22:49:51,653 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-29 22:49:51,653 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-29 22:49:51,653 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-29 22:49:51,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-29 22:49:51,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-29 22:49:51,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-29 22:49:51,891 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-29 22:49:51,892 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-29 22:49:51,893 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml [2024-01-29 22:49:51,978 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-29 22:49:51,979 INFO L274 PluginConnector]: CDTParser initialized [2024-01-29 22:49:51,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2024-01-29 22:49:52,955 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-29 22:49:53,167 INFO L384 CDTParser]: Found 1 translation units. [2024-01-29 22:49:53,168 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2024-01-29 22:49:53,178 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0306ecd/2da4e3cb9b45416dbdede35f8bafaccd/FLAG12c451a7f [2024-01-29 22:49:53,189 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0306ecd/2da4e3cb9b45416dbdede35f8bafaccd [2024-01-29 22:49:53,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-29 22:49:53,190 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-29 22:49:53,192 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-29 22:49:53,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-29 22:49:53,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-29 22:49:53,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 10:49:51" (1/2) ... [2024-01-29 22:49:53,199 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52dd147e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:49:53, skipping insertion in model container [2024-01-29 22:49:53,199 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 10:49:51" (1/2) ... [2024-01-29 22:49:53,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4bcc1e19 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:49:53, skipping insertion in model container [2024-01-29 22:49:53,200 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:49:53" (2/2) ... [2024-01-29 22:49:53,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52dd147e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53, skipping insertion in model container [2024-01-29 22:49:53,201 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:49:53" (2/2) ... [2024-01-29 22:49:53,201 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-29 22:49:53,246 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-29 22:49:53,248 INFO L98 nessWitnessExtractor]: Location invariant before [L1013-L1013] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-29 22:49:53,248 INFO L98 nessWitnessExtractor]: Location invariant before [L1013-L1013] (unsigned long )arg == 0UL [2024-01-29 22:49:53,248 INFO L98 nessWitnessExtractor]: Location invariant after [L996-L997] (unsigned long )arg == 0UL [2024-01-29 22:49:53,248 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L997] (unsigned long )arg == 0UL [2024-01-29 22:49:53,249 INFO L98 nessWitnessExtractor]: Location invariant after [L996-L997] ((unsigned long )arg == 0UL) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) || i == 4) [2024-01-29 22:49:53,249 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L997] ((unsigned long )arg == 0UL) && (((((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) || (5 <= i && i <= 799)) || (5 <= i && i <= 799)) || i == 4) [2024-01-29 22:49:53,250 INFO L98 nessWitnessExtractor]: Location invariant before [L1000-L1000] (i == 800) && ((unsigned long )arg == 0UL) [2024-01-29 22:49:53,250 INFO L98 nessWitnessExtractor]: Location invariant before [L1000-L1000] i == 800 [2024-01-29 22:49:53,250 INFO L98 nessWitnessExtractor]: Location invariant before [L994-L994] (unsigned long )arg == 0UL [2024-01-29 22:49:53,250 INFO L98 nessWitnessExtractor]: Location invariant before [L994-L994] ((unsigned long )arg == 0UL) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) [2024-01-29 22:49:53,250 INFO L98 nessWitnessExtractor]: Location invariant before [L995-L995] (unsigned long )arg == 0UL [2024-01-29 22:49:53,250 INFO L98 nessWitnessExtractor]: Location invariant before [L995-L995] ((unsigned long )arg == 0UL) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) [2024-01-29 22:49:53,250 INFO L98 nessWitnessExtractor]: Location invariant before [L1007-L1007] (unsigned long )arg == 0UL [2024-01-29 22:49:53,251 INFO L98 nessWitnessExtractor]: Location invariant before [L1007-L1007] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-29 22:49:53,251 INFO L98 nessWitnessExtractor]: Loop invariant at [L991-L999] (unsigned long )arg == 0UL [2024-01-29 22:49:53,251 INFO L98 nessWitnessExtractor]: Loop invariant at [L1005-L1014] (unsigned long )arg == 0UL [2024-01-29 22:49:53,251 INFO L98 nessWitnessExtractor]: Location invariant before [L1021-L1021] flag == (_Bool)0 [2024-01-29 22:49:53,251 INFO L98 nessWitnessExtractor]: Location invariant before [L1015-L1015] i == 800 [2024-01-29 22:49:53,251 INFO L98 nessWitnessExtractor]: Location invariant before [L1015-L1015] (i == 800) && ((unsigned long )arg == 0UL) [2024-01-29 22:49:53,251 INFO L98 nessWitnessExtractor]: Location invariant before [L998-L998] ((unsigned long )arg == 0UL) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) || i == 4) [2024-01-29 22:49:53,252 INFO L98 nessWitnessExtractor]: Location invariant before [L998-L998] (unsigned long )arg == 0UL [2024-01-29 22:49:53,252 INFO L98 nessWitnessExtractor]: Location invariant before [L1008-L1012] (unsigned long )arg == 0UL [2024-01-29 22:49:53,252 INFO L98 nessWitnessExtractor]: Location invariant before [L1008-L1012] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-29 22:49:53,252 INFO L98 nessWitnessExtractor]: Location invariant before [L993-L993] (unsigned long )arg == 0UL [2024-01-29 22:49:53,252 INFO L98 nessWitnessExtractor]: Location invariant before [L993-L993] ((unsigned long )arg == 0UL) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) [2024-01-29 22:49:53,253 INFO L98 nessWitnessExtractor]: Location invariant before [L1010-L1011] ((unsigned long )arg == 0UL) && ((((((((((((((((i == 5 || i == 4) || i == 4) || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 7) || i == 6) || i == 6) [2024-01-29 22:49:53,253 INFO L98 nessWitnessExtractor]: Location invariant after [L1010-L1011] (unsigned long )arg == 0UL [2024-01-29 22:49:53,253 INFO L98 nessWitnessExtractor]: Location invariant before [L1010-L1011] (unsigned long )arg == 0UL [2024-01-29 22:49:53,253 INFO L98 nessWitnessExtractor]: Location invariant after [L1010-L1011] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-29 22:49:53,253 INFO L98 nessWitnessExtractor]: Location invariant before [L1020-L1020] flag == (_Bool)0 [2024-01-29 22:49:53,291 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-29 22:49:53,650 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2024-01-29 22:49:53,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-29 22:49:53,684 INFO L202 MainTranslator]: Completed pre-run [2024-01-29 22:49:53,720 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-29 22:49:53,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-29 22:49:53,824 INFO L206 MainTranslator]: Completed translation [2024-01-29 22:49:53,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53 WrapperNode [2024-01-29 22:49:53,825 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-29 22:49:53,826 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-29 22:49:53,826 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-29 22:49:53,826 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-29 22:49:53,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (1/1) ... [2024-01-29 22:49:53,868 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (1/1) ... [2024-01-29 22:49:53,893 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 188 [2024-01-29 22:49:53,897 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-29 22:49:53,898 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-29 22:49:53,898 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-29 22:49:53,898 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-29 22:49:53,907 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (1/1) ... [2024-01-29 22:49:53,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (1/1) ... [2024-01-29 22:49:53,917 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (1/1) ... [2024-01-29 22:49:53,942 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 2, 5, 3]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 0, 5, 0]. The 4 writes are split as follows [0, 1, 1, 0, 2]. [2024-01-29 22:49:53,942 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (1/1) ... [2024-01-29 22:49:53,943 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (1/1) ... [2024-01-29 22:49:53,962 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (1/1) ... [2024-01-29 22:49:53,965 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (1/1) ... [2024-01-29 22:49:53,968 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (1/1) ... [2024-01-29 22:49:53,974 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (1/1) ... [2024-01-29 22:49:53,977 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-29 22:49:53,979 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-29 22:49:53,980 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-29 22:49:53,980 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-29 22:49:53,980 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (1/1) ... [2024-01-29 22:49:53,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-29 22:49:53,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:49:54,002 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) [2024-01-29 22:49:54,019 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 [2024-01-29 22:49:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-29 22:49:54,040 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-29 22:49:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-29 22:49:54,041 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-29 22:49:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-29 22:49:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-29 22:49:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-29 22:49:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-29 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-29 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-29 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-29 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-29 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-29 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-29 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-29 22:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-29 22:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-29 22:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-29 22:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-29 22:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-29 22:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-29 22:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-29 22:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-29 22:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-29 22:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-29 22:49:54,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-29 22:49:54,045 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-29 22:49:54,205 INFO L244 CfgBuilder]: Building ICFG [2024-01-29 22:49:54,207 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-29 22:49:54,600 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-29 22:49:54,601 INFO L293 CfgBuilder]: Performing block encoding [2024-01-29 22:49:54,722 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-29 22:49:54,728 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-29 22:49:54,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:49:54 BoogieIcfgContainer [2024-01-29 22:49:54,728 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-29 22:49:54,730 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-29 22:49:54,730 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-29 22:49:54,733 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-29 22:49:54,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 10:49:51" (1/4) ... [2024-01-29 22:49:54,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230288cc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 29.01 10:49:54, skipping insertion in model container [2024-01-29 22:49:54,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.01 10:49:53" (2/4) ... [2024-01-29 22:49:54,735 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230288cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:49:54, skipping insertion in model container [2024-01-29 22:49:54,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:53" (3/4) ... [2024-01-29 22:49:54,735 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230288cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:49:54, skipping insertion in model container [2024-01-29 22:49:54,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:49:54" (4/4) ... [2024-01-29 22:49:54,736 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-01-29 22:49:54,750 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-29 22:49:54,751 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-01-29 22:49:54,751 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-29 22:49:54,837 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-29 22:49:54,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 99 transitions, 212 flow [2024-01-29 22:49:54,912 INFO L124 PetriNetUnfolderBase]: 5/97 cut-off events. [2024-01-29 22:49:54,912 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-29 22:49:54,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 5/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 314 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2024-01-29 22:49:54,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 99 transitions, 212 flow [2024-01-29 22:49:54,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 95 transitions, 199 flow [2024-01-29 22:49:54,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-29 22:49:54,933 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;@3f6561c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-29 22:49:54,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2024-01-29 22:49:54,935 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-29 22:49:54,936 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-29 22:49:54,936 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-29 22:49:54,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:54,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-29 22:49:54,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:49:54,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:54,941 INFO L85 PathProgramCache]: Analyzing trace with hash 15795, now seen corresponding path program 1 times [2024-01-29 22:49:54,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:54,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213324930] [2024-01-29 22:49:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:54,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:55,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:55,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213324930] [2024-01-29 22:49:55,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213324930] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:49:55,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:49:55,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-29 22:49:55,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776825062] [2024-01-29 22:49:55,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:49:55,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 22:49:55,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:55,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 22:49:55,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 22:49:55,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 22:49:55,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2024-01-29 22:49:55,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:55,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 22:49:55,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:55,497 INFO L124 PetriNetUnfolderBase]: 470/1557 cut-off events. [2024-01-29 22:49:55,498 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-01-29 22:49:55,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2337 conditions, 1557 events. 470/1557 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 11594 event pairs, 357 based on Foata normal form. 48/1127 useless extension candidates. Maximal degree in co-relation 2193. Up to 740 conditions per place. [2024-01-29 22:49:55,513 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 28 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2024-01-29 22:49:55,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 249 flow [2024-01-29 22:49:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 22:49:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 22:49:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-01-29 22:49:55,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7575757575757576 [2024-01-29 22:49:55,528 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 199 flow. Second operand 3 states and 225 transitions. [2024-01-29 22:49:55,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 249 flow [2024-01-29 22:49:55,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 244 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-29 22:49:55,536 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 188 flow [2024-01-29 22:49:55,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2024-01-29 22:49:55,540 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -3 predicate places. [2024-01-29 22:49:55,541 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 188 flow [2024-01-29 22:49:55,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2024-01-29 22:49:55,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:55,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-29 22:49:55,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-29 22:49:55,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:49:55,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1716767669, now seen corresponding path program 1 times [2024-01-29 22:49:55,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:55,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861297928] [2024-01-29 22:49:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:55,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:55,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:55,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861297928] [2024-01-29 22:49:55,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861297928] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:49:55,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:49:55,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:49:55,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121658162] [2024-01-29 22:49:55,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:49:55,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:49:55,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:55,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:49:55,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:49:55,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 99 [2024-01-29 22:49:55,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 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) [2024-01-29 22:49:55,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:55,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 99 [2024-01-29 22:49:55,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:56,002 INFO L124 PetriNetUnfolderBase]: 472/1588 cut-off events. [2024-01-29 22:49:56,002 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-29 22:49:56,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 1588 events. 472/1588 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 11812 event pairs, 185 based on Foata normal form. 118/1305 useless extension candidates. Maximal degree in co-relation 2352. Up to 704 conditions per place. [2024-01-29 22:49:56,011 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 39 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2024-01-29 22:49:56,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 95 transitions, 280 flow [2024-01-29 22:49:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:49:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:49:56,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 281 transitions. [2024-01-29 22:49:56,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7095959595959596 [2024-01-29 22:49:56,013 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 188 flow. Second operand 4 states and 281 transitions. [2024-01-29 22:49:56,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 95 transitions, 280 flow [2024-01-29 22:49:56,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 95 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 22:49:56,015 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 175 flow [2024-01-29 22:49:56,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2024-01-29 22:49:56,016 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -9 predicate places. [2024-01-29 22:49:56,016 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 175 flow [2024-01-29 22:49:56,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 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) [2024-01-29 22:49:56,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:56,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:56,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-29 22:49:56,017 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:49:56,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:56,018 INFO L85 PathProgramCache]: Analyzing trace with hash 546305752, now seen corresponding path program 1 times [2024-01-29 22:49:56,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:56,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958149477] [2024-01-29 22:49:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:56,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:56,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:56,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958149477] [2024-01-29 22:49:56,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958149477] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:49:56,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:49:56,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:49:56,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796650427] [2024-01-29 22:49:56,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:49:56,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:49:56,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:56,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:49:56,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:49:56,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 99 [2024-01-29 22:49:56,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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) [2024-01-29 22:49:56,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:56,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 99 [2024-01-29 22:49:56,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:56,394 INFO L124 PetriNetUnfolderBase]: 1547/2848 cut-off events. [2024-01-29 22:49:56,395 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-01-29 22:49:56,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5546 conditions, 2848 events. 1547/2848 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 17140 event pairs, 781 based on Foata normal form. 22/2478 useless extension candidates. Maximal degree in co-relation 5540. Up to 1589 conditions per place. [2024-01-29 22:49:56,408 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 85 selfloop transitions, 3 changer transitions 0/124 dead transitions. [2024-01-29 22:49:56,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 437 flow [2024-01-29 22:49:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:49:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:49:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 255 transitions. [2024-01-29 22:49:56,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439393939393939 [2024-01-29 22:49:56,412 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 175 flow. Second operand 4 states and 255 transitions. [2024-01-29 22:49:56,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 437 flow [2024-01-29 22:49:56,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 124 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 22:49:56,415 INFO L231 Difference]: Finished difference. Result has 90 places, 84 transitions, 198 flow [2024-01-29 22:49:56,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2024-01-29 22:49:56,417 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -7 predicate places. [2024-01-29 22:49:56,417 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 198 flow [2024-01-29 22:49:56,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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) [2024-01-29 22:49:56,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:56,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:56,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-29 22:49:56,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:49:56,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:56,418 INFO L85 PathProgramCache]: Analyzing trace with hash 546357003, now seen corresponding path program 1 times [2024-01-29 22:49:56,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:56,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721903718] [2024-01-29 22:49:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:56,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:56,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:56,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721903718] [2024-01-29 22:49:56,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721903718] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:49:56,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:49:56,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:49:56,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229987467] [2024-01-29 22:49:56,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:49:56,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:49:56,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:56,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:49:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:49:56,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 99 [2024-01-29 22:49:56,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 84 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 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) [2024-01-29 22:49:56,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:56,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 99 [2024-01-29 22:49:56,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:56,758 INFO L124 PetriNetUnfolderBase]: 669/2110 cut-off events. [2024-01-29 22:49:56,758 INFO L125 PetriNetUnfolderBase]: For 88/124 co-relation queries the response was YES. [2024-01-29 22:49:56,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3341 conditions, 2110 events. 669/2110 cut-off events. For 88/124 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 15556 event pairs, 35 based on Foata normal form. 300/2066 useless extension candidates. Maximal degree in co-relation 3334. Up to 891 conditions per place. [2024-01-29 22:49:56,767 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 55 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2024-01-29 22:49:56,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 104 transitions, 373 flow [2024-01-29 22:49:56,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:49:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:49:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 297 transitions. [2024-01-29 22:49:56,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-01-29 22:49:56,768 INFO L175 Difference]: Start difference. First operand has 90 places, 84 transitions, 198 flow. Second operand 4 states and 297 transitions. [2024-01-29 22:49:56,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 104 transitions, 373 flow [2024-01-29 22:49:56,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 104 transitions, 363 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 22:49:56,771 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 184 flow [2024-01-29 22:49:56,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2024-01-29 22:49:56,772 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -13 predicate places. [2024-01-29 22:49:56,773 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 184 flow [2024-01-29 22:49:56,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 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) [2024-01-29 22:49:56,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:56,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:56,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-29 22:49:56,776 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:49:56,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:56,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1063088654, now seen corresponding path program 1 times [2024-01-29 22:49:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:56,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905976552] [2024-01-29 22:49:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:56,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:56,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:56,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905976552] [2024-01-29 22:49:56,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905976552] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:49:56,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:49:56,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:49:56,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47830018] [2024-01-29 22:49:56,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:49:56,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:49:56,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:56,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:49:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:49:56,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 99 [2024-01-29 22:49:56,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 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) [2024-01-29 22:49:56,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:56,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 99 [2024-01-29 22:49:56,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:57,291 INFO L124 PetriNetUnfolderBase]: 2421/4917 cut-off events. [2024-01-29 22:49:57,291 INFO L125 PetriNetUnfolderBase]: For 296/427 co-relation queries the response was YES. [2024-01-29 22:49:57,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9486 conditions, 4917 events. 2421/4917 cut-off events. For 296/427 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 34616 event pairs, 1366 based on Foata normal form. 117/4450 useless extension candidates. Maximal degree in co-relation 9479. Up to 2500 conditions per place. [2024-01-29 22:49:57,314 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 89 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-01-29 22:49:57,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 122 transitions, 474 flow [2024-01-29 22:49:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:49:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:49:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 263 transitions. [2024-01-29 22:49:57,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6641414141414141 [2024-01-29 22:49:57,363 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 184 flow. Second operand 4 states and 263 transitions. [2024-01-29 22:49:57,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 122 transitions, 474 flow [2024-01-29 22:49:57,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 122 transitions, 471 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 22:49:57,365 INFO L231 Difference]: Finished difference. Result has 86 places, 78 transitions, 205 flow [2024-01-29 22:49:57,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=86, PETRI_TRANSITIONS=78} [2024-01-29 22:49:57,366 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -11 predicate places. [2024-01-29 22:49:57,366 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 78 transitions, 205 flow [2024-01-29 22:49:57,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 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) [2024-01-29 22:49:57,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:57,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:57,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-29 22:49:57,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:49:57,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:57,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1688337316, now seen corresponding path program 1 times [2024-01-29 22:49:57,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:57,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773353071] [2024-01-29 22:49:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:57,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:57,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:57,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773353071] [2024-01-29 22:49:57,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773353071] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:49:57,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:49:57,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:49:57,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079232586] [2024-01-29 22:49:57,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:49:57,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:49:57,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:57,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:49:57,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:49:57,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 99 [2024-01-29 22:49:57,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 78 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 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) [2024-01-29 22:49:57,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:57,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 99 [2024-01-29 22:49:57,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:57,808 INFO L124 PetriNetUnfolderBase]: 925/2722 cut-off events. [2024-01-29 22:49:57,808 INFO L125 PetriNetUnfolderBase]: For 168/239 co-relation queries the response was YES. [2024-01-29 22:49:57,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4910 conditions, 2722 events. 925/2722 cut-off events. For 168/239 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 20756 event pairs, 116 based on Foata normal form. 60/2620 useless extension candidates. Maximal degree in co-relation 4902. Up to 1225 conditions per place. [2024-01-29 22:49:57,825 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 58 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2024-01-29 22:49:57,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 107 transitions, 409 flow [2024-01-29 22:49:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:49:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:49:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 319 transitions. [2024-01-29 22:49:57,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8055555555555556 [2024-01-29 22:49:57,827 INFO L175 Difference]: Start difference. First operand has 86 places, 78 transitions, 205 flow. Second operand 4 states and 319 transitions. [2024-01-29 22:49:57,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 107 transitions, 409 flow [2024-01-29 22:49:57,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 107 transitions, 399 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 22:49:57,832 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 223 flow [2024-01-29 22:49:57,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2024-01-29 22:49:57,834 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -8 predicate places. [2024-01-29 22:49:57,834 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 223 flow [2024-01-29 22:49:57,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 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) [2024-01-29 22:49:57,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:57,835 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:57,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-29 22:49:57,838 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:49:57,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:57,839 INFO L85 PathProgramCache]: Analyzing trace with hash -432232040, now seen corresponding path program 1 times [2024-01-29 22:49:57,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:57,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045311775] [2024-01-29 22:49:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:57,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:58,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:58,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045311775] [2024-01-29 22:49:58,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045311775] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 22:49:58,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905278222] [2024-01-29 22:49:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:58,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:49:58,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:49:58,054 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) [2024-01-29 22:49:58,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-29 22:49:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:58,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-29 22:49:58,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 22:49:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:58,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 22:49:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:59,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905278222] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 22:49:59,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 22:49:59,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-29 22:49:59,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381499440] [2024-01-29 22:49:59,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 22:49:59,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-29 22:49:59,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:59,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-29 22:49:59,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-29 22:49:59,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 99 [2024-01-29 22:49:59,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 223 flow. Second operand has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 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) [2024-01-29 22:49:59,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:59,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 99 [2024-01-29 22:49:59,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:00,044 INFO L124 PetriNetUnfolderBase]: 3777/7000 cut-off events. [2024-01-29 22:50:00,044 INFO L125 PetriNetUnfolderBase]: For 1335/1566 co-relation queries the response was YES. [2024-01-29 22:50:00,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15176 conditions, 7000 events. 3777/7000 cut-off events. For 1335/1566 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 46595 event pairs, 51 based on Foata normal form. 723/7444 useless extension candidates. Maximal degree in co-relation 15165. Up to 1447 conditions per place. [2024-01-29 22:50:00,091 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 192 selfloop transitions, 7 changer transitions 0/228 dead transitions. [2024-01-29 22:50:00,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 228 transitions, 1037 flow [2024-01-29 22:50:00,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-29 22:50:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-29 22:50:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 524 transitions. [2024-01-29 22:50:00,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6616161616161617 [2024-01-29 22:50:00,094 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 223 flow. Second operand 8 states and 524 transitions. [2024-01-29 22:50:00,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 228 transitions, 1037 flow [2024-01-29 22:50:00,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 228 transitions, 1029 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 22:50:00,101 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 242 flow [2024-01-29 22:50:00,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=242, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2024-01-29 22:50:00,102 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -3 predicate places. [2024-01-29 22:50:00,103 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 242 flow [2024-01-29 22:50:00,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 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) [2024-01-29 22:50:00,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:00,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:50:00,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-29 22:50:00,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:50:00,320 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:50:00,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:00,321 INFO L85 PathProgramCache]: Analyzing trace with hash 987241317, now seen corresponding path program 1 times [2024-01-29 22:50:00,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:00,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130445024] [2024-01-29 22:50:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:00,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:00,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:00,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130445024] [2024-01-29 22:50:00,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130445024] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 22:50:00,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139288691] [2024-01-29 22:50:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:00,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:50:00,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:50:00,485 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) [2024-01-29 22:50:00,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-29 22:50:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:00,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-29 22:50:00,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 22:50:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:00,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 22:50:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:01,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139288691] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 22:50:01,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 22:50:01,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-29 22:50:01,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620302849] [2024-01-29 22:50:01,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 22:50:01,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-29 22:50:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-29 22:50:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-29 22:50:01,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 99 [2024-01-29 22:50:01,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 78 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 44.2) internal successors, (442), 10 states have internal predecessors, (442), 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) [2024-01-29 22:50:01,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:01,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 99 [2024-01-29 22:50:01,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:02,828 INFO L124 PetriNetUnfolderBase]: 7013/12412 cut-off events. [2024-01-29 22:50:02,829 INFO L125 PetriNetUnfolderBase]: For 7405/7565 co-relation queries the response was YES. [2024-01-29 22:50:02,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27934 conditions, 12412 events. 7013/12412 cut-off events. For 7405/7565 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 84403 event pairs, 183 based on Foata normal form. 1378/12814 useless extension candidates. Maximal degree in co-relation 27919. Up to 2916 conditions per place. [2024-01-29 22:50:02,893 INFO L140 encePairwiseOnDemand]: 88/99 looper letters, 179 selfloop transitions, 7 changer transitions 0/210 dead transitions. [2024-01-29 22:50:02,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 210 transitions, 1098 flow [2024-01-29 22:50:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-29 22:50:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-29 22:50:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 498 transitions. [2024-01-29 22:50:02,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6287878787878788 [2024-01-29 22:50:02,895 INFO L175 Difference]: Start difference. First operand has 94 places, 78 transitions, 242 flow. Second operand 8 states and 498 transitions. [2024-01-29 22:50:02,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 210 transitions, 1098 flow [2024-01-29 22:50:02,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 210 transitions, 1033 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-01-29 22:50:02,903 INFO L231 Difference]: Finished difference. Result has 96 places, 75 transitions, 248 flow [2024-01-29 22:50:02,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=248, PETRI_PLACES=96, PETRI_TRANSITIONS=75} [2024-01-29 22:50:02,903 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -1 predicate places. [2024-01-29 22:50:02,903 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 75 transitions, 248 flow [2024-01-29 22:50:02,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 44.2) internal successors, (442), 10 states have internal predecessors, (442), 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) [2024-01-29 22:50:02,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:02,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:50:02,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-29 22:50:03,116 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,SelfDestructingSolverStorable7 [2024-01-29 22:50:03,117 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:50:03,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:03,117 INFO L85 PathProgramCache]: Analyzing trace with hash -173284058, now seen corresponding path program 1 times [2024-01-29 22:50:03,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:03,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450438782] [2024-01-29 22:50:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:03,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:03,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:03,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450438782] [2024-01-29 22:50:03,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450438782] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:03,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:03,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:50:03,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808805140] [2024-01-29 22:50:03,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:03,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 22:50:03,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:03,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 22:50:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 22:50:03,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 99 [2024-01-29 22:50:03,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 75 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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) [2024-01-29 22:50:03,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:03,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 99 [2024-01-29 22:50:03,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:03,654 INFO L124 PetriNetUnfolderBase]: 1601/5304 cut-off events. [2024-01-29 22:50:03,655 INFO L125 PetriNetUnfolderBase]: For 4196/4294 co-relation queries the response was YES. [2024-01-29 22:50:03,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10617 conditions, 5304 events. 1601/5304 cut-off events. For 4196/4294 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 36918 event pairs, 429 based on Foata normal form. 386/5462 useless extension candidates. Maximal degree in co-relation 10598. Up to 2010 conditions per place. [2024-01-29 22:50:03,693 INFO L140 encePairwiseOnDemand]: 95/99 looper letters, 52 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2024-01-29 22:50:03,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 460 flow [2024-01-29 22:50:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 22:50:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 22:50:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2024-01-29 22:50:03,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8148148148148148 [2024-01-29 22:50:03,694 INFO L175 Difference]: Start difference. First operand has 96 places, 75 transitions, 248 flow. Second operand 3 states and 242 transitions. [2024-01-29 22:50:03,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 460 flow [2024-01-29 22:50:03,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 94 transitions, 440 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-01-29 22:50:03,700 INFO L231 Difference]: Finished difference. Result has 95 places, 75 transitions, 245 flow [2024-01-29 22:50:03,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=95, PETRI_TRANSITIONS=75} [2024-01-29 22:50:03,701 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -2 predicate places. [2024-01-29 22:50:03,701 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 75 transitions, 245 flow [2024-01-29 22:50:03,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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) [2024-01-29 22:50:03,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:03,702 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:50:03,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-29 22:50:03,702 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:50:03,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash -63998545, now seen corresponding path program 1 times [2024-01-29 22:50:03,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:03,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764238511] [2024-01-29 22:50:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:03,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:03,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:03,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764238511] [2024-01-29 22:50:03,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764238511] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 22:50:03,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454577096] [2024-01-29 22:50:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:03,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:50:03,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:50:03,905 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) [2024-01-29 22:50:03,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-29 22:50:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:04,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-29 22:50:04,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 22:50:04,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-29 22:50:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:04,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 22:50:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:04,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454577096] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 22:50:04,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 22:50:04,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-29 22:50:04,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470410786] [2024-01-29 22:50:04,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 22:50:04,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-29 22:50:04,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-29 22:50:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-29 22:50:04,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 22:50:04,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 75 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 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) [2024-01-29 22:50:04,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:04,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 22:50:04,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:06,174 INFO L124 PetriNetUnfolderBase]: 4997/15822 cut-off events. [2024-01-29 22:50:06,174 INFO L125 PetriNetUnfolderBase]: For 12450/12555 co-relation queries the response was YES. [2024-01-29 22:50:06,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33632 conditions, 15822 events. 4997/15822 cut-off events. For 12450/12555 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 149143 event pairs, 995 based on Foata normal form. 219/15352 useless extension candidates. Maximal degree in co-relation 33613. Up to 1911 conditions per place. [2024-01-29 22:50:06,251 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 203 selfloop transitions, 19 changer transitions 0/258 dead transitions. [2024-01-29 22:50:06,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 258 transitions, 1488 flow [2024-01-29 22:50:06,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-29 22:50:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-29 22:50:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 948 transitions. [2024-01-29 22:50:06,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2024-01-29 22:50:06,253 INFO L175 Difference]: Start difference. First operand has 95 places, 75 transitions, 245 flow. Second operand 12 states and 948 transitions. [2024-01-29 22:50:06,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 258 transitions, 1488 flow [2024-01-29 22:50:06,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 258 transitions, 1466 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 22:50:06,278 INFO L231 Difference]: Finished difference. Result has 111 places, 93 transitions, 375 flow [2024-01-29 22:50:06,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=375, PETRI_PLACES=111, PETRI_TRANSITIONS=93} [2024-01-29 22:50:06,279 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 14 predicate places. [2024-01-29 22:50:06,279 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 93 transitions, 375 flow [2024-01-29 22:50:06,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 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) [2024-01-29 22:50:06,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:06,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:50:06,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-29 22:50:06,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:50:06,492 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:50:06,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:06,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2058267795, now seen corresponding path program 1 times [2024-01-29 22:50:06,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:06,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432184910] [2024-01-29 22:50:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:06,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:06,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:06,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432184910] [2024-01-29 22:50:06,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432184910] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:06,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:06,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-29 22:50:06,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020475296] [2024-01-29 22:50:06,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:06,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-29 22:50:06,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:06,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-29 22:50:06,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-29 22:50:06,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 22:50:06,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 93 transitions, 375 flow. Second operand has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 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) [2024-01-29 22:50:06,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:06,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 22:50:06,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:08,751 INFO L124 PetriNetUnfolderBase]: 5231/16332 cut-off events. [2024-01-29 22:50:08,751 INFO L125 PetriNetUnfolderBase]: For 17149/17256 co-relation queries the response was YES. [2024-01-29 22:50:08,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36410 conditions, 16332 events. 5231/16332 cut-off events. For 17149/17256 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 154635 event pairs, 1223 based on Foata normal form. 123/15745 useless extension candidates. Maximal degree in co-relation 36383. Up to 6125 conditions per place. [2024-01-29 22:50:08,842 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 112 selfloop transitions, 13 changer transitions 0/161 dead transitions. [2024-01-29 22:50:08,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 161 transitions, 926 flow [2024-01-29 22:50:08,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-29 22:50:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-29 22:50:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 538 transitions. [2024-01-29 22:50:08,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7763347763347763 [2024-01-29 22:50:08,846 INFO L175 Difference]: Start difference. First operand has 111 places, 93 transitions, 375 flow. Second operand 7 states and 538 transitions. [2024-01-29 22:50:08,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 161 transitions, 926 flow [2024-01-29 22:50:08,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 161 transitions, 912 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-29 22:50:08,890 INFO L231 Difference]: Finished difference. Result has 121 places, 99 transitions, 453 flow [2024-01-29 22:50:08,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=453, PETRI_PLACES=121, PETRI_TRANSITIONS=99} [2024-01-29 22:50:08,891 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 24 predicate places. [2024-01-29 22:50:08,891 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 99 transitions, 453 flow [2024-01-29 22:50:08,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 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) [2024-01-29 22:50:08,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:08,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:50:08,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-29 22:50:08,892 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:50:08,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:08,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1014515922, now seen corresponding path program 1 times [2024-01-29 22:50:08,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:08,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237163111] [2024-01-29 22:50:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:08,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-01-29 22:50:09,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:09,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237163111] [2024-01-29 22:50:09,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237163111] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:09,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:09,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-29 22:50:09,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219979955] [2024-01-29 22:50:09,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:09,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-29 22:50:09,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:09,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-29 22:50:09,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-29 22:50:09,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 22:50:09,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 99 transitions, 453 flow. Second operand has 7 states, 7 states have (on average 67.28571428571429) internal successors, (471), 7 states have internal predecessors, (471), 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) [2024-01-29 22:50:09,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:09,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 22:50:09,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:11,361 INFO L124 PetriNetUnfolderBase]: 6047/18698 cut-off events. [2024-01-29 22:50:11,361 INFO L125 PetriNetUnfolderBase]: For 23892/23991 co-relation queries the response was YES. [2024-01-29 22:50:11,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43716 conditions, 18698 events. 6047/18698 cut-off events. For 23892/23991 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 180864 event pairs, 1129 based on Foata normal form. 99/18041 useless extension candidates. Maximal degree in co-relation 43683. Up to 5526 conditions per place. [2024-01-29 22:50:11,483 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 119 selfloop transitions, 20 changer transitions 0/175 dead transitions. [2024-01-29 22:50:11,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 175 transitions, 1117 flow [2024-01-29 22:50:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-29 22:50:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-29 22:50:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 597 transitions. [2024-01-29 22:50:11,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7537878787878788 [2024-01-29 22:50:11,485 INFO L175 Difference]: Start difference. First operand has 121 places, 99 transitions, 453 flow. Second operand 8 states and 597 transitions. [2024-01-29 22:50:11,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 175 transitions, 1117 flow [2024-01-29 22:50:11,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 175 transitions, 1117 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-29 22:50:11,535 INFO L231 Difference]: Finished difference. Result has 133 places, 110 transitions, 611 flow [2024-01-29 22:50:11,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=611, PETRI_PLACES=133, PETRI_TRANSITIONS=110} [2024-01-29 22:50:11,535 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 36 predicate places. [2024-01-29 22:50:11,535 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 110 transitions, 611 flow [2024-01-29 22:50:11,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.28571428571429) internal successors, (471), 7 states have internal predecessors, (471), 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) [2024-01-29 22:50:11,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:11,536 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:50:11,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-29 22:50:11,536 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err13ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:50:11,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash -382877009, now seen corresponding path program 1 times [2024-01-29 22:50:11,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:11,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839488672] [2024-01-29 22:50:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:11,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-01-29 22:50:11,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:11,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839488672] [2024-01-29 22:50:11,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839488672] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:11,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:11,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-29 22:50:11,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124731455] [2024-01-29 22:50:11,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:11,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-29 22:50:11,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-29 22:50:11,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-29 22:50:11,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 99 [2024-01-29 22:50:11,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 110 transitions, 611 flow. Second operand has 6 states, 6 states have (on average 49.333333333333336) internal successors, (296), 6 states have internal predecessors, (296), 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) [2024-01-29 22:50:11,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:11,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 99 [2024-01-29 22:50:11,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:15,815 INFO L124 PetriNetUnfolderBase]: 14825/33104 cut-off events. [2024-01-29 22:50:15,815 INFO L125 PetriNetUnfolderBase]: For 47053/47152 co-relation queries the response was YES. [2024-01-29 22:50:16,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87553 conditions, 33104 events. 14825/33104 cut-off events. For 47053/47152 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 299821 event pairs, 3767 based on Foata normal form. 99/32531 useless extension candidates. Maximal degree in co-relation 87513. Up to 16331 conditions per place. [2024-01-29 22:50:16,182 INFO L140 encePairwiseOnDemand]: 93/99 looper letters, 199 selfloop transitions, 9 changer transitions 3/241 dead transitions. [2024-01-29 22:50:16,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 241 transitions, 1939 flow [2024-01-29 22:50:16,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-29 22:50:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-29 22:50:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2024-01-29 22:50:16,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6144781144781145 [2024-01-29 22:50:16,184 INFO L175 Difference]: Start difference. First operand has 133 places, 110 transitions, 611 flow. Second operand 6 states and 365 transitions. [2024-01-29 22:50:16,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 241 transitions, 1939 flow [2024-01-29 22:50:16,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 241 transitions, 1893 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-01-29 22:50:16,359 INFO L231 Difference]: Finished difference. Result has 136 places, 109 transitions, 611 flow [2024-01-29 22:50:16,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=611, PETRI_PLACES=136, PETRI_TRANSITIONS=109} [2024-01-29 22:50:16,359 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 39 predicate places. [2024-01-29 22:50:16,359 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 109 transitions, 611 flow [2024-01-29 22:50:16,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.333333333333336) internal successors, (296), 6 states have internal predecessors, (296), 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) [2024-01-29 22:50:16,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:16,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:50:16,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-29 22:50:16,360 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:50:16,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:16,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1615639629, now seen corresponding path program 1 times [2024-01-29 22:50:16,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:16,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763083824] [2024-01-29 22:50:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:16,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:17,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:17,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763083824] [2024-01-29 22:50:17,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763083824] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 22:50:17,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343835062] [2024-01-29 22:50:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:17,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:50:17,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:50:17,304 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) [2024-01-29 22:50:17,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-29 22:50:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:17,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-29 22:50:17,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 22:50:17,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-29 22:50:17,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2024-01-29 22:50:17,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-01-29 22:50:17,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 43 [2024-01-29 22:50:18,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-29 22:50:18,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 57 [2024-01-29 22:50:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:18,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 22:50:19,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2024-01-29 22:50:19,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-29 22:50:19,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-01-29 22:50:19,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-29 22:50:19,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2024-01-29 22:50:19,433 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2024-01-29 22:50:19,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 94 [2024-01-29 22:50:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:19,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343835062] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 22:50:19,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 22:50:19,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-01-29 22:50:19,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497917085] [2024-01-29 22:50:19,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 22:50:19,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-29 22:50:19,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:19,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-29 22:50:19,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2024-01-29 22:50:19,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 22:50:19,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 109 transitions, 611 flow. Second operand has 25 states, 25 states have (on average 67.72) internal successors, (1693), 25 states have internal predecessors, (1693), 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) [2024-01-29 22:50:19,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:19,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 22:50:19,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:29,182 INFO L124 PetriNetUnfolderBase]: 14873/44792 cut-off events. [2024-01-29 22:50:29,182 INFO L125 PetriNetUnfolderBase]: For 95437/95476 co-relation queries the response was YES. [2024-01-29 22:50:29,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117840 conditions, 44792 events. 14873/44792 cut-off events. For 95437/95476 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 490520 event pairs, 2197 based on Foata normal form. 259/44176 useless extension candidates. Maximal degree in co-relation 117799. Up to 5200 conditions per place. [2024-01-29 22:50:29,557 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 714 selfloop transitions, 123 changer transitions 55/927 dead transitions. [2024-01-29 22:50:29,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 927 transitions, 7216 flow [2024-01-29 22:50:29,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-01-29 22:50:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-01-29 22:50:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4523 transitions. [2024-01-29 22:50:29,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7614478114478115 [2024-01-29 22:50:29,567 INFO L175 Difference]: Start difference. First operand has 136 places, 109 transitions, 611 flow. Second operand 60 states and 4523 transitions. [2024-01-29 22:50:29,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 927 transitions, 7216 flow [2024-01-29 22:50:29,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 927 transitions, 6907 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-01-29 22:50:29,811 INFO L231 Difference]: Finished difference. Result has 205 places, 228 transitions, 1907 flow [2024-01-29 22:50:29,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=1907, PETRI_PLACES=205, PETRI_TRANSITIONS=228} [2024-01-29 22:50:29,813 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 108 predicate places. [2024-01-29 22:50:29,813 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 228 transitions, 1907 flow [2024-01-29 22:50:29,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 67.72) internal successors, (1693), 25 states have internal predecessors, (1693), 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) [2024-01-29 22:50:29,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:29,814 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:50:29,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-29 22:50:30,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:50:30,024 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:50:30,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash -459201125, now seen corresponding path program 1 times [2024-01-29 22:50:30,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:30,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517949994] [2024-01-29 22:50:30,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:30,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-29 22:50:30,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:30,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517949994] [2024-01-29 22:50:30,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517949994] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 22:50:30,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241130487] [2024-01-29 22:50:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:30,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:50:30,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:50:30,400 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) [2024-01-29 22:50:30,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-29 22:50:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:30,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-29 22:50:30,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 22:50:30,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-29 22:50:30,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-29 22:50:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:30,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 22:50:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-01-29 22:50:30,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241130487] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 22:50:30,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 22:50:30,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2024-01-29 22:50:30,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605889979] [2024-01-29 22:50:30,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 22:50:30,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-29 22:50:30,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:30,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-29 22:50:30,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-01-29 22:50:30,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 22:50:30,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 228 transitions, 1907 flow. Second operand has 14 states, 14 states have (on average 70.28571428571429) internal successors, (984), 14 states have internal predecessors, (984), 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) [2024-01-29 22:50:30,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:30,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 22:50:30,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:40,943 INFO L124 PetriNetUnfolderBase]: 18651/56634 cut-off events. [2024-01-29 22:50:40,943 INFO L125 PetriNetUnfolderBase]: For 148512/148551 co-relation queries the response was YES. [2024-01-29 22:50:41,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155355 conditions, 56634 events. 18651/56634 cut-off events. For 148512/148551 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 627178 event pairs, 3079 based on Foata normal form. 251/55688 useless extension candidates. Maximal degree in co-relation 155301. Up to 6438 conditions per place. [2024-01-29 22:50:41,531 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 462 selfloop transitions, 128 changer transitions 15/640 dead transitions. [2024-01-29 22:50:41,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 640 transitions, 5753 flow [2024-01-29 22:50:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-29 22:50:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-29 22:50:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1876 transitions. [2024-01-29 22:50:41,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7895622895622896 [2024-01-29 22:50:41,534 INFO L175 Difference]: Start difference. First operand has 205 places, 228 transitions, 1907 flow. Second operand 24 states and 1876 transitions. [2024-01-29 22:50:41,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 640 transitions, 5753 flow [2024-01-29 22:50:41,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 640 transitions, 5469 flow, removed 139 selfloop flow, removed 3 redundant places. [2024-01-29 22:50:41,913 INFO L231 Difference]: Finished difference. Result has 236 places, 277 transitions, 2666 flow [2024-01-29 22:50:41,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2666, PETRI_PLACES=236, PETRI_TRANSITIONS=277} [2024-01-29 22:50:41,914 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 139 predicate places. [2024-01-29 22:50:41,914 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 277 transitions, 2666 flow [2024-01-29 22:50:41,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.28571428571429) internal successors, (984), 14 states have internal predecessors, (984), 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) [2024-01-29 22:50:41,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:41,914 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:50:41,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-29 22:50:42,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-29 22:50:42,115 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err15ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:50:42,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash 452719801, now seen corresponding path program 1 times [2024-01-29 22:50:42,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:42,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812614753] [2024-01-29 22:50:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:42,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-01-29 22:50:42,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:42,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812614753] [2024-01-29 22:50:42,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812614753] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:42,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:42,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-29 22:50:42,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217161629] [2024-01-29 22:50:42,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:42,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 22:50:42,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:42,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 22:50:42,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-29 22:50:42,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 99 [2024-01-29 22:50:42,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 277 transitions, 2666 flow. Second operand has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 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) [2024-01-29 22:50:42,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:42,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 99 [2024-01-29 22:50:42,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:53,872 INFO L124 PetriNetUnfolderBase]: 28600/65479 cut-off events. [2024-01-29 22:50:53,872 INFO L125 PetriNetUnfolderBase]: For 147166/147206 co-relation queries the response was YES. [2024-01-29 22:50:54,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193191 conditions, 65479 events. 28600/65479 cut-off events. For 147166/147206 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 642056 event pairs, 8235 based on Foata normal form. 16/64572 useless extension candidates. Maximal degree in co-relation 193126. Up to 33444 conditions per place. [2024-01-29 22:50:55,044 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 311 selfloop transitions, 8 changer transitions 0/393 dead transitions. [2024-01-29 22:50:55,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 393 transitions, 4355 flow [2024-01-29 22:50:55,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-29 22:50:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-29 22:50:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2024-01-29 22:50:55,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7212121212121212 [2024-01-29 22:50:55,046 INFO L175 Difference]: Start difference. First operand has 236 places, 277 transitions, 2666 flow. Second operand 5 states and 357 transitions. [2024-01-29 22:50:55,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 393 transitions, 4355 flow [2024-01-29 22:50:55,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 393 transitions, 4276 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-01-29 22:50:55,508 INFO L231 Difference]: Finished difference. Result has 238 places, 277 transitions, 2622 flow [2024-01-29 22:50:55,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2622, PETRI_PLACES=238, PETRI_TRANSITIONS=277} [2024-01-29 22:50:55,509 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 141 predicate places. [2024-01-29 22:50:55,509 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 277 transitions, 2622 flow [2024-01-29 22:50:55,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 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) [2024-01-29 22:50:55,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:55,509 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:50:55,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-29 22:50:55,510 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err16ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 22:50:55,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1149412499, now seen corresponding path program 1 times [2024-01-29 22:50:55,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:55,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739311877] [2024-01-29 22:50:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:55,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-01-29 22:50:55,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:55,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739311877] [2024-01-29 22:50:55,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739311877] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:55,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:55,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:50:55,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231978664] [2024-01-29 22:50:55,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:55,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:50:55,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:55,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:50:55,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:50:55,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 99 [2024-01-29 22:50:55,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 277 transitions, 2622 flow. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 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) [2024-01-29 22:50:55,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:55,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 99 [2024-01-29 22:50:55,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand