./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack-1.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-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cb09d658 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-1.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack-1.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-cb09d65-m [2024-01-27 23:01:29,448 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 23:01:29,509 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 23:01:29,526 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 23:01:29,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 23:01:29,563 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 23:01:29,564 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 23:01:29,565 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 23:01:29,565 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 23:01:29,568 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 23:01:29,569 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 23:01:29,569 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 23:01:29,570 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 23:01:29,571 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 23:01:29,571 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 23:01:29,571 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 23:01:29,571 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 23:01:29,572 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 23:01:29,572 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 23:01:29,572 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 23:01:29,572 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 23:01:29,573 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 23:01:29,573 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 23:01:29,573 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 23:01:29,573 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 23:01:29,573 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 23:01:29,574 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 23:01:29,574 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 23:01:29,574 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 23:01:29,575 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 23:01:29,575 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 23:01:29,575 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 23:01:29,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 23:01:29,576 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 23:01:29,576 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 23:01:29,576 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 23:01:29,576 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 23:01:29,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 23:01:29,577 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 23:01:29,577 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 23:01:29,577 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 23:01:29,577 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 23:01:29,578 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 23:01:29,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-27 23:01:29,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 23:01:29,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 23:01:29,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 23:01:29,798 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 23:01:29,798 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 23:01:29,799 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2024-01-27 23:01:30,904 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 23:01:31,115 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 23:01:31,130 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2024-01-27 23:01:31,142 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68a5b5798/d789d790a2444110a9a30cf0a0e300a1/FLAGa79820cde [2024-01-27 23:01:31,152 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68a5b5798/d789d790a2444110a9a30cf0a0e300a1 [2024-01-27 23:01:31,154 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-27 23:01:31,156 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-27 23:01:31,158 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack-1.yml/witness.yml [2024-01-27 23:01:31,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 23:01:31,233 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-27 23:01:31,234 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 23:01:31,237 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 23:01:31,240 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 23:01:31,241 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:01:31" (1/2) ... [2024-01-27 23:01:31,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9a7a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:01:31, skipping insertion in model container [2024-01-27 23:01:31,242 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:01:31" (1/2) ... [2024-01-27 23:01:31,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2224f8c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:01:31, skipping insertion in model container [2024-01-27 23:01:31,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 11:01:31" (2/2) ... [2024-01-27 23:01:31,244 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9a7a85 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31, skipping insertion in model container [2024-01-27 23:01:31,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 11:01:31" (2/2) ... [2024-01-27 23:01:31,245 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-27 23:01:31,300 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-27 23:01:31,301 INFO L98 nessWitnessExtractor]: Location invariant before [L997-L998] (unsigned long )arg == 0UL [2024-01-27 23:01:31,301 INFO L98 nessWitnessExtractor]: Location invariant before [L997-L998] ((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) || i == 4 [2024-01-27 23:01:31,301 INFO L98 nessWitnessExtractor]: Location invariant after [L997-L998] (((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || i == 4 [2024-01-27 23:01:31,301 INFO L98 nessWitnessExtractor]: Location invariant after [L997-L998] (unsigned long )arg == 0UL [2024-01-27 23:01:31,302 INFO L98 nessWitnessExtractor]: Location invariant before [L1009-L1013] (unsigned long )arg == 0UL [2024-01-27 23:01:31,302 INFO L98 nessWitnessExtractor]: Location invariant before [L1009-L1013] (((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-01-27 23:01:31,302 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L996] (unsigned long )arg == 0UL [2024-01-27 23:01:31,303 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L996] (((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-01-27 23:01:31,303 INFO L98 nessWitnessExtractor]: Location invariant before [L1008-L1008] (((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-01-27 23:01:31,303 INFO L98 nessWitnessExtractor]: Location invariant before [L1008-L1008] (unsigned long )arg == 0UL [2024-01-27 23:01:31,303 INFO L98 nessWitnessExtractor]: Location invariant before [L1001-L1001] (unsigned long )arg == 0UL [2024-01-27 23:01:31,303 INFO L98 nessWitnessExtractor]: Location invariant before [L1001-L1001] i == 5 [2024-01-27 23:01:31,303 INFO L98 nessWitnessExtractor]: Location invariant before [L1011-L1012] (((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0) [2024-01-27 23:01:31,303 INFO L98 nessWitnessExtractor]: Location invariant after [L1011-L1012] (((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-01-27 23:01:31,303 INFO L98 nessWitnessExtractor]: Location invariant before [L1011-L1012] (unsigned long )arg == 0UL [2024-01-27 23:01:31,304 INFO L98 nessWitnessExtractor]: Location invariant after [L1011-L1012] (unsigned long )arg == 0UL [2024-01-27 23:01:31,304 INFO L98 nessWitnessExtractor]: Location invariant before [L1022-L1022] flag == (_Bool)0 [2024-01-27 23:01:31,304 INFO L98 nessWitnessExtractor]: Location invariant before [L994-L994] (((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-01-27 23:01:31,304 INFO L98 nessWitnessExtractor]: Location invariant before [L994-L994] (unsigned long )arg == 0UL [2024-01-27 23:01:31,304 INFO L98 nessWitnessExtractor]: Loop invariant at [L1006-L1015] (unsigned long )arg == 0UL [2024-01-27 23:01:31,304 INFO L98 nessWitnessExtractor]: Location invariant before [L999-L999] (((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || i == 4 [2024-01-27 23:01:31,305 INFO L98 nessWitnessExtractor]: Location invariant before [L999-L999] (unsigned long )arg == 0UL [2024-01-27 23:01:31,305 INFO L98 nessWitnessExtractor]: Location invariant before [L1021-L1021] flag == (_Bool)0 [2024-01-27 23:01:31,305 INFO L98 nessWitnessExtractor]: Location invariant before [L1016-L1016] i == 5 [2024-01-27 23:01:31,305 INFO L98 nessWitnessExtractor]: Location invariant before [L1016-L1016] (unsigned long )arg == 0UL [2024-01-27 23:01:31,305 INFO L98 nessWitnessExtractor]: Location invariant before [L995-L995] (unsigned long )arg == 0UL [2024-01-27 23:01:31,305 INFO L98 nessWitnessExtractor]: Location invariant before [L995-L995] (((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-01-27 23:01:31,306 INFO L98 nessWitnessExtractor]: Loop invariant at [L992-L1000] (unsigned long )arg == 0UL [2024-01-27 23:01:31,306 INFO L98 nessWitnessExtractor]: Location invariant before [L1014-L1014] (unsigned long )arg == 0UL [2024-01-27 23:01:31,306 INFO L98 nessWitnessExtractor]: Location invariant before [L1014-L1014] (((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-01-27 23:01:31,347 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 23:01:31,638 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-1.i[41520,41533] [2024-01-27 23:01:31,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 23:01:31,680 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 23:01:31,711 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-1.i[41520,41533] 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 [2024-01-27 23:01:31,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 23:01:31,865 INFO L206 MainTranslator]: Completed translation [2024-01-27 23:01:31,865 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31 WrapperNode [2024-01-27 23:01:31,865 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 23:01:31,866 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 23:01:31,866 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 23:01:31,866 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 23:01:31,871 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,897 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,938 INFO L138 Inliner]: procedures = 278, calls = 45, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 192 [2024-01-27 23:01:31,938 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 23:01:31,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 23:01:31,939 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 23:01:31,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 23:01:31,949 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,961 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,986 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 5, 2, 7, 2]. 39 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 0, 5, 0]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-01-27 23:01:31,987 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,987 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:31,997 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:32,000 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:32,009 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:32,011 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:32,014 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 23:01:32,014 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 23:01:32,014 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 23:01:32,015 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 23:01:32,015 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (1/1) ... [2024-01-27 23:01:32,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 23:01:32,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:32,053 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) [2024-01-27 23:01:32,067 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 [2024-01-27 23:01:32,103 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-27 23:01:32,103 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-27 23:01:32,104 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-27 23:01:32,104 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-27 23:01:32,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 23:01:32,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 23:01:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 23:01:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 23:01:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 23:01:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 23:01:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 23:01:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 23:01:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 23:01:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 23:01:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 23:01:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 23:01:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 23:01:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 23:01:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 23:01:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 23:01:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 23:01:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 23:01:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 23:01:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 23:01:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 23:01:32,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 23:01:32,120 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 23:01:32,235 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 23:01:32,237 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 23:01:32,539 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 23:01:32,539 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 23:01:32,757 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 23:01:32,757 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 23:01:32,759 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:01:32 BoogieIcfgContainer [2024-01-27 23:01:32,759 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 23:01:32,761 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 23:01:32,761 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 23:01:32,764 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 23:01:32,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:01:31" (1/4) ... [2024-01-27 23:01:32,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7312e5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:01:32, skipping insertion in model container [2024-01-27 23:01:32,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 11:01:31" (2/4) ... [2024-01-27 23:01:32,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7312e5fa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.01 11:01:32, skipping insertion in model container [2024-01-27 23:01:32,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:31" (3/4) ... [2024-01-27 23:01:32,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7312e5fa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.01 11:01:32, skipping insertion in model container [2024-01-27 23:01:32,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:01:32" (4/4) ... [2024-01-27 23:01:32,768 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-01-27 23:01:32,782 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 23:01:32,783 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-01-27 23:01:32,783 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 23:01:32,858 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 23:01:32,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 99 transitions, 212 flow [2024-01-27 23:01:32,931 INFO L124 PetriNetUnfolderBase]: 5/97 cut-off events. [2024-01-27 23:01:32,931 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 23:01:32,936 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 311 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. [2024-01-27 23:01:32,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 99 transitions, 212 flow [2024-01-27 23:01:32,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 95 transitions, 199 flow [2024-01-27 23:01:32,950 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 23:01:32,955 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;@61d9547a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 23:01:32,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2024-01-27 23:01:32,961 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 23:01:32,961 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-27 23:01:32,961 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 23:01:32,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:32,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-27 23:01:32,963 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)] === [2024-01-27 23:01:32,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash 15809, now seen corresponding path program 1 times [2024-01-27 23:01:32,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:32,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893545096] [2024-01-27 23:01:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:32,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:33,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:33,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893545096] [2024-01-27 23:01:33,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893545096] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:33,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:33,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-27 23:01:33,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135675920] [2024-01-27 23:01:33,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:33,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 23:01:33,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:33,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 23:01:33,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 23:01:33,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:01:33,317 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) [2024-01-27 23:01:33,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:33,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:01:33,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:33,607 INFO L124 PetriNetUnfolderBase]: 461/1666 cut-off events. [2024-01-27 23:01:33,607 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-01-27 23:01:33,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2420 conditions, 1666 events. 461/1666 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 12725 event pairs, 357 based on Foata normal form. 48/1222 useless extension candidates. Maximal degree in co-relation 2276. Up to 714 conditions per place. [2024-01-27 23:01:33,623 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 28 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2024-01-27 23:01:33,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 249 flow [2024-01-27 23:01:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 23:01:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 23:01:33,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-01-27 23:01:33,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7575757575757576 [2024-01-27 23:01:33,637 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 199 flow. Second operand 3 states and 225 transitions. [2024-01-27 23:01:33,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 249 flow [2024-01-27 23:01:33,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 244 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 23:01:33,644 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 188 flow [2024-01-27 23:01:33,646 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} [2024-01-27 23:01:33,648 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -3 predicate places. [2024-01-27 23:01:33,649 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 188 flow [2024-01-27 23:01:33,649 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) [2024-01-27 23:01:33,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:33,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-27 23:01:33,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 23:01:33,650 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)] === [2024-01-27 23:01:33,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:33,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1731818146, now seen corresponding path program 1 times [2024-01-27 23:01:33,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:33,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689383217] [2024-01-27 23:01:33,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:33,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:33,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:33,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689383217] [2024-01-27 23:01:33,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689383217] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:33,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:33,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 23:01:33,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550942288] [2024-01-27 23:01:33,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:33,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 23:01:33,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:33,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 23:01:33,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 23:01:33,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 99 [2024-01-27 23:01:33,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 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) [2024-01-27 23:01:33,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:33,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 99 [2024-01-27 23:01:33,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:34,042 INFO L124 PetriNetUnfolderBase]: 471/1588 cut-off events. [2024-01-27 23:01:34,043 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-27 23:01:34,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 1588 events. 471/1588 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11742 event pairs, 185 based on Foata normal form. 120/1307 useless extension candidates. Maximal degree in co-relation 2349. Up to 704 conditions per place. [2024-01-27 23:01:34,052 INFO L140 encePairwiseOnDemand]: 88/99 looper letters, 39 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-01-27 23:01:34,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 278 flow [2024-01-27 23:01:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 23:01:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 23:01:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 278 transitions. [2024-01-27 23:01:34,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.702020202020202 [2024-01-27 23:01:34,055 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 188 flow. Second operand 4 states and 278 transitions. [2024-01-27 23:01:34,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 278 flow [2024-01-27 23:01:34,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 94 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:34,057 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 173 flow [2024-01-27 23:01:34,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2024-01-27 23:01:34,058 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -10 predicate places. [2024-01-27 23:01:34,059 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 173 flow [2024-01-27 23:01:34,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 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) [2024-01-27 23:01:34,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:34,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:34,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 23:01:34,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:34,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:34,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2123684677, now seen corresponding path program 1 times [2024-01-27 23:01:34,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:34,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724903308] [2024-01-27 23:01:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:34,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:34,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:34,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724903308] [2024-01-27 23:01:34,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724903308] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:34,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:34,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 23:01:34,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498463936] [2024-01-27 23:01:34,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:34,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 23:01:34,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:34,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 23:01:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 23:01:34,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 99 [2024-01-27 23:01:34,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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) [2024-01-27 23:01:34,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:34,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 99 [2024-01-27 23:01:34,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:34,321 INFO L124 PetriNetUnfolderBase]: 411/1286 cut-off events. [2024-01-27 23:01:34,321 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-27 23:01:34,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1982 conditions, 1286 events. 411/1286 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 9061 event pairs, 11 based on Foata normal form. 208/1295 useless extension candidates. Maximal degree in co-relation 1976. Up to 558 conditions per place. [2024-01-27 23:01:34,327 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 52 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2024-01-27 23:01:34,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 320 flow [2024-01-27 23:01:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 23:01:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 23:01:34,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 294 transitions. [2024-01-27 23:01:34,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7424242424242424 [2024-01-27 23:01:34,329 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 173 flow. Second operand 4 states and 294 transitions. [2024-01-27 23:01:34,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 320 flow [2024-01-27 23:01:34,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 99 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 23:01:34,331 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 158 flow [2024-01-27 23:01:34,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2024-01-27 23:01:34,332 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -17 predicate places. [2024-01-27 23:01:34,332 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 158 flow [2024-01-27 23:01:34,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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) [2024-01-27 23:01:34,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:34,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:34,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 23:01:34,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err15ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:34,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:34,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2124912550, now seen corresponding path program 1 times [2024-01-27 23:01:34,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:34,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603180041] [2024-01-27 23:01:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:34,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:34,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:34,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603180041] [2024-01-27 23:01:34,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603180041] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:34,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:34,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 23:01:34,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687797721] [2024-01-27 23:01:34,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:34,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 23:01:34,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:34,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 23:01:34,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 23:01:34,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 99 [2024-01-27 23:01:34,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:34,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:34,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 99 [2024-01-27 23:01:34,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:34,574 INFO L124 PetriNetUnfolderBase]: 903/2306 cut-off events. [2024-01-27 23:01:34,575 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-01-27 23:01:34,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3933 conditions, 2306 events. 903/2306 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 16020 event pairs, 565 based on Foata normal form. 146/2159 useless extension candidates. Maximal degree in co-relation 3927. Up to 1015 conditions per place. [2024-01-27 23:01:34,586 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 54 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-01-27 23:01:34,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 94 transitions, 316 flow [2024-01-27 23:01:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 23:01:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 23:01:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2024-01-27 23:01:34,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8080808080808081 [2024-01-27 23:01:34,587 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 158 flow. Second operand 3 states and 240 transitions. [2024-01-27 23:01:34,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 94 transitions, 316 flow [2024-01-27 23:01:34,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 23:01:34,589 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 179 flow [2024-01-27 23:01:34,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-01-27 23:01:34,590 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -16 predicate places. [2024-01-27 23:01:34,590 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 179 flow [2024-01-27 23:01:34,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:34,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:34,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:34,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 23:01:34,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:34,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1822536341, now seen corresponding path program 1 times [2024-01-27 23:01:34,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:34,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906170551] [2024-01-27 23:01:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:34,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:34,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906170551] [2024-01-27 23:01:34,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906170551] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:34,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:34,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 23:01:34,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936282141] [2024-01-27 23:01:34,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:34,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 23:01:34,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:34,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 23:01:34,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 23:01:34,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 99 [2024-01-27 23:01:34,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2024-01-27 23:01:34,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:34,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 99 [2024-01-27 23:01:34,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:34,915 INFO L124 PetriNetUnfolderBase]: 1327/3695 cut-off events. [2024-01-27 23:01:34,916 INFO L125 PetriNetUnfolderBase]: For 211/221 co-relation queries the response was YES. [2024-01-27 23:01:34,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6291 conditions, 3695 events. 1327/3695 cut-off events. For 211/221 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 29329 event pairs, 795 based on Foata normal form. 200/3556 useless extension candidates. Maximal degree in co-relation 6284. Up to 1523 conditions per place. [2024-01-27 23:01:34,935 INFO L140 encePairwiseOnDemand]: 91/99 looper letters, 54 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-01-27 23:01:34,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 96 transitions, 345 flow [2024-01-27 23:01:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 23:01:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 23:01:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2024-01-27 23:01:34,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2024-01-27 23:01:34,937 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 179 flow. Second operand 3 states and 243 transitions. [2024-01-27 23:01:34,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 96 transitions, 345 flow [2024-01-27 23:01:34,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 96 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:34,940 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 199 flow [2024-01-27 23:01:34,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2024-01-27 23:01:34,943 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -14 predicate places. [2024-01-27 23:01:34,943 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 199 flow [2024-01-27 23:01:34,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2024-01-27 23:01:34,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:34,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:34,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 23:01:34,944 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)] === [2024-01-27 23:01:34,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:34,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1933197463, now seen corresponding path program 1 times [2024-01-27 23:01:34,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:34,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637266271] [2024-01-27 23:01:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:34,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:35,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:35,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637266271] [2024-01-27 23:01:35,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637266271] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:35,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:35,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 23:01:35,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156649253] [2024-01-27 23:01:35,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:35,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 23:01:35,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:35,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 23:01:35,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 23:01:35,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 99 [2024-01-27 23:01:35,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 199 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) [2024-01-27 23:01:35,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:35,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 99 [2024-01-27 23:01:35,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:35,300 INFO L124 PetriNetUnfolderBase]: 925/2726 cut-off events. [2024-01-27 23:01:35,300 INFO L125 PetriNetUnfolderBase]: For 253/277 co-relation queries the response was YES. [2024-01-27 23:01:35,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4927 conditions, 2726 events. 925/2726 cut-off events. For 253/277 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 20604 event pairs, 116 based on Foata normal form. 20/2609 useless extension candidates. Maximal degree in co-relation 4919. Up to 1225 conditions per place. [2024-01-27 23:01:35,313 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 58 selfloop transitions, 3 changer transitions 0/105 dead transitions. [2024-01-27 23:01:35,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 105 transitions, 405 flow [2024-01-27 23:01:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 23:01:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 23:01:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 319 transitions. [2024-01-27 23:01:35,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8055555555555556 [2024-01-27 23:01:35,314 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 199 flow. Second operand 4 states and 319 transitions. [2024-01-27 23:01:35,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 105 transitions, 405 flow [2024-01-27 23:01:35,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 105 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:35,317 INFO L231 Difference]: Finished difference. Result has 87 places, 78 transitions, 219 flow [2024-01-27 23:01:35,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=87, PETRI_TRANSITIONS=78} [2024-01-27 23:01:35,318 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -10 predicate places. [2024-01-27 23:01:35,318 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 78 transitions, 219 flow [2024-01-27 23:01:35,318 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) [2024-01-27 23:01:35,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:35,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:35,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 23:01:35,319 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:35,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash 235535351, now seen corresponding path program 1 times [2024-01-27 23:01:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:35,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926376948] [2024-01-27 23:01:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:35,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:35,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:35,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926376948] [2024-01-27 23:01:35,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926376948] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:35,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918252672] [2024-01-27 23:01:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:35,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:35,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:35,391 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) [2024-01-27 23:01:35,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 23:01:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:35,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 23:01:35,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:35,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:35,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918252672] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:35,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:35,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2024-01-27 23:01:35,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018129269] [2024-01-27 23:01:35,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:35,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 23:01:35,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:35,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 23:01:35,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 23:01:35,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 99 [2024-01-27 23:01:35,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 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) [2024-01-27 23:01:35,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:35,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 99 [2024-01-27 23:01:35,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:36,101 INFO L124 PetriNetUnfolderBase]: 2019/4510 cut-off events. [2024-01-27 23:01:36,104 INFO L125 PetriNetUnfolderBase]: For 1121/1189 co-relation queries the response was YES. [2024-01-27 23:01:36,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8974 conditions, 4510 events. 2019/4510 cut-off events. For 1121/1189 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 31688 event pairs, 51 based on Foata normal form. 416/4748 useless extension candidates. Maximal degree in co-relation 8963. Up to 974 conditions per place. [2024-01-27 23:01:36,139 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 123 selfloop transitions, 5 changer transitions 0/163 dead transitions. [2024-01-27 23:01:36,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 163 transitions, 729 flow [2024-01-27 23:01:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 23:01:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 23:01:36,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2024-01-27 23:01:36,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7760942760942761 [2024-01-27 23:01:36,141 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 219 flow. Second operand 6 states and 461 transitions. [2024-01-27 23:01:36,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 163 transitions, 729 flow [2024-01-27 23:01:36,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 163 transitions, 723 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:36,146 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 226 flow [2024-01-27 23:01:36,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2024-01-27 23:01:36,146 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -8 predicate places. [2024-01-27 23:01:36,147 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 226 flow [2024-01-27 23:01:36,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 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) [2024-01-27 23:01:36,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:36,147 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] [2024-01-27 23:01:36,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:36,358 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 [2024-01-27 23:01:36,358 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err15ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:36,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:36,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1596690239, now seen corresponding path program 1 times [2024-01-27 23:01:36,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:36,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555394112] [2024-01-27 23:01:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:36,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:36,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:36,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555394112] [2024-01-27 23:01:36,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555394112] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:36,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769857431] [2024-01-27 23:01:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:36,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:36,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:36,450 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) [2024-01-27 23:01:36,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 23:01:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:36,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 23:01:36,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:36,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:36,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769857431] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:36,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:36,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-27 23:01:36,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716498768] [2024-01-27 23:01:36,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:36,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 23:01:36,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 23:01:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-27 23:01:36,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 99 [2024-01-27 23:01:36,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 59.285714285714285) internal successors, (415), 7 states have internal predecessors, (415), 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) [2024-01-27 23:01:36,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:36,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 99 [2024-01-27 23:01:36,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:37,805 INFO L124 PetriNetUnfolderBase]: 5251/10202 cut-off events. [2024-01-27 23:01:37,806 INFO L125 PetriNetUnfolderBase]: For 4391/4391 co-relation queries the response was YES. [2024-01-27 23:01:37,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22455 conditions, 10202 events. 5251/10202 cut-off events. For 4391/4391 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 69844 event pairs, 558 based on Foata normal form. 138/9701 useless extension candidates. Maximal degree in co-relation 22441. Up to 1792 conditions per place. [2024-01-27 23:01:37,863 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 148 selfloop transitions, 24 changer transitions 0/199 dead transitions. [2024-01-27 23:01:37,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 199 transitions, 1008 flow [2024-01-27 23:01:37,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 23:01:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 23:01:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 527 transitions. [2024-01-27 23:01:37,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7604617604617605 [2024-01-27 23:01:37,865 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 226 flow. Second operand 7 states and 527 transitions. [2024-01-27 23:01:37,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 199 transitions, 1008 flow [2024-01-27 23:01:37,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 199 transitions, 966 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-01-27 23:01:37,873 INFO L231 Difference]: Finished difference. Result has 97 places, 90 transitions, 361 flow [2024-01-27 23:01:37,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=361, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2024-01-27 23:01:37,874 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 0 predicate places. [2024-01-27 23:01:37,874 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 361 flow [2024-01-27 23:01:37,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 59.285714285714285) internal successors, (415), 7 states have internal predecessors, (415), 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) [2024-01-27 23:01:37,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:37,875 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-01-27 23:01:37,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:38,086 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 [2024-01-27 23:01:38,087 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:38,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:38,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2042209682, now seen corresponding path program 1 times [2024-01-27 23:01:38,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:38,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36882597] [2024-01-27 23:01:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:38,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:38,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:38,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36882597] [2024-01-27 23:01:38,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36882597] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:38,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052313254] [2024-01-27 23:01:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:38,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:38,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:38,193 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) [2024-01-27 23:01:38,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 23:01:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:38,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 23:01:38,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:38,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:38,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052313254] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:38,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:38,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2024-01-27 23:01:38,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168253716] [2024-01-27 23:01:38,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:38,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 23:01:38,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:38,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 23:01:38,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 23:01:38,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 99 [2024-01-27 23:01:38,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 90 transitions, 361 flow. Second operand has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2024-01-27 23:01:38,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:38,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 99 [2024-01-27 23:01:38,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:39,440 INFO L124 PetriNetUnfolderBase]: 4275/8930 cut-off events. [2024-01-27 23:01:39,441 INFO L125 PetriNetUnfolderBase]: For 5217/5217 co-relation queries the response was YES. [2024-01-27 23:01:39,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19294 conditions, 8930 events. 4275/8930 cut-off events. For 5217/5217 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 63229 event pairs, 388 based on Foata normal form. 828/9172 useless extension candidates. Maximal degree in co-relation 19277. Up to 3422 conditions per place. [2024-01-27 23:01:39,488 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 117 selfloop transitions, 7 changer transitions 0/151 dead transitions. [2024-01-27 23:01:39,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 151 transitions, 745 flow [2024-01-27 23:01:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 23:01:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 23:01:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 436 transitions. [2024-01-27 23:01:39,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.734006734006734 [2024-01-27 23:01:39,490 INFO L175 Difference]: Start difference. First operand has 97 places, 90 transitions, 361 flow. Second operand 6 states and 436 transitions. [2024-01-27 23:01:39,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 151 transitions, 745 flow [2024-01-27 23:01:39,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 151 transitions, 737 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:39,498 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 251 flow [2024-01-27 23:01:39,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=251, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2024-01-27 23:01:39,499 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -2 predicate places. [2024-01-27 23:01:39,500 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 251 flow [2024-01-27 23:01:39,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 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) [2024-01-27 23:01:39,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:39,500 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] [2024-01-27 23:01:39,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:39,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:39,713 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:39,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:39,713 INFO L85 PathProgramCache]: Analyzing trace with hash -454364252, now seen corresponding path program 1 times [2024-01-27 23:01:39,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:39,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334290001] [2024-01-27 23:01:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:39,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:39,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:39,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334290001] [2024-01-27 23:01:39,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334290001] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:39,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:39,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 23:01:39,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762366544] [2024-01-27 23:01:39,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:39,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 23:01:39,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:39,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 23:01:39,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 23:01:39,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 99 [2024-01-27 23:01:39,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 251 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) [2024-01-27 23:01:39,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:39,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 99 [2024-01-27 23:01:39,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:40,239 INFO L124 PetriNetUnfolderBase]: 1323/4310 cut-off events. [2024-01-27 23:01:40,240 INFO L125 PetriNetUnfolderBase]: For 3284/3284 co-relation queries the response was YES. [2024-01-27 23:01:40,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8926 conditions, 4310 events. 1323/4310 cut-off events. For 3284/3284 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 28594 event pairs, 357 based on Foata normal form. 240/4378 useless extension candidates. Maximal degree in co-relation 8907. Up to 1650 conditions per place. [2024-01-27 23:01:40,258 INFO L140 encePairwiseOnDemand]: 95/99 looper letters, 50 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2024-01-27 23:01:40,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 460 flow [2024-01-27 23:01:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 23:01:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 23:01:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2024-01-27 23:01:40,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8148148148148148 [2024-01-27 23:01:40,260 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 251 flow. Second operand 3 states and 242 transitions. [2024-01-27 23:01:40,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 460 flow [2024-01-27 23:01:40,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 450 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 23:01:40,263 INFO L231 Difference]: Finished difference. Result has 94 places, 73 transitions, 254 flow [2024-01-27 23:01:40,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=94, PETRI_TRANSITIONS=73} [2024-01-27 23:01:40,264 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -3 predicate places. [2024-01-27 23:01:40,264 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 73 transitions, 254 flow [2024-01-27 23:01:40,264 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) [2024-01-27 23:01:40,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:40,264 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] [2024-01-27 23:01:40,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-27 23:01:40,265 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:40,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:40,265 INFO L85 PathProgramCache]: Analyzing trace with hash -495437668, now seen corresponding path program 1 times [2024-01-27 23:01:40,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:40,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578257990] [2024-01-27 23:01:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:40,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:40,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:40,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578257990] [2024-01-27 23:01:40,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578257990] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:40,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877504264] [2024-01-27 23:01:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:40,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:40,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:40,373 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) [2024-01-27 23:01:40,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 23:01:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:40,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 23:01:40,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:40,520 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 [2024-01-27 23:01:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:40,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:40,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877504264] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:40,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:40,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-27 23:01:40,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224762817] [2024-01-27 23:01:40,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:40,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 23:01:40,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:40,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 23:01:40,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-27 23:01:40,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:01:40,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 73 transitions, 254 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) [2024-01-27 23:01:40,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:40,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:01:40,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:42,013 INFO L124 PetriNetUnfolderBase]: 3907/11906 cut-off events. [2024-01-27 23:01:42,014 INFO L125 PetriNetUnfolderBase]: For 11351/11351 co-relation queries the response was YES. [2024-01-27 23:01:42,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26804 conditions, 11906 events. 3907/11906 cut-off events. For 11351/11351 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 105317 event pairs, 765 based on Foata normal form. 70/11565 useless extension candidates. Maximal degree in co-relation 26785. Up to 1503 conditions per place. [2024-01-27 23:01:42,079 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 192 selfloop transitions, 19 changer transitions 0/246 dead transitions. [2024-01-27 23:01:42,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 246 transitions, 1445 flow [2024-01-27 23:01:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 23:01:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 23:01:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 948 transitions. [2024-01-27 23:01:42,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2024-01-27 23:01:42,082 INFO L175 Difference]: Start difference. First operand has 94 places, 73 transitions, 254 flow. Second operand 12 states and 948 transitions. [2024-01-27 23:01:42,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 246 transitions, 1445 flow [2024-01-27 23:01:42,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 246 transitions, 1423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:42,097 INFO L231 Difference]: Finished difference. Result has 110 places, 91 transitions, 384 flow [2024-01-27 23:01:42,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=384, PETRI_PLACES=110, PETRI_TRANSITIONS=91} [2024-01-27 23:01:42,097 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 13 predicate places. [2024-01-27 23:01:42,097 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 91 transitions, 384 flow [2024-01-27 23:01:42,098 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) [2024-01-27 23:01:42,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:42,098 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] [2024-01-27 23:01:42,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:42,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:42,311 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)] === [2024-01-27 23:01:42,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1906085485, now seen corresponding path program 1 times [2024-01-27 23:01:42,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:42,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475160633] [2024-01-27 23:01:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:42,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:42,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:42,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475160633] [2024-01-27 23:01:42,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475160633] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:42,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:42,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 23:01:42,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284972835] [2024-01-27 23:01:42,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:42,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 23:01:42,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:42,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 23:01:42,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-27 23:01:42,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:01:42,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 91 transitions, 384 flow. Second operand has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 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) [2024-01-27 23:01:42,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:42,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:01:42,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:44,566 INFO L124 PetriNetUnfolderBase]: 4147/12536 cut-off events. [2024-01-27 23:01:44,566 INFO L125 PetriNetUnfolderBase]: For 15979/15979 co-relation queries the response was YES. [2024-01-27 23:01:44,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29804 conditions, 12536 events. 4147/12536 cut-off events. For 15979/15979 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 109769 event pairs, 1365 based on Foata normal form. 26/12052 useless extension candidates. Maximal degree in co-relation 29777. Up to 5193 conditions per place. [2024-01-27 23:01:44,649 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 117 selfloop transitions, 7 changer transitions 0/159 dead transitions. [2024-01-27 23:01:44,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 159 transitions, 962 flow [2024-01-27 23:01:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 23:01:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 23:01:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 471 transitions. [2024-01-27 23:01:44,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7929292929292929 [2024-01-27 23:01:44,651 INFO L175 Difference]: Start difference. First operand has 110 places, 91 transitions, 384 flow. Second operand 6 states and 471 transitions. [2024-01-27 23:01:44,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 159 transitions, 962 flow [2024-01-27 23:01:44,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 159 transitions, 948 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:44,671 INFO L231 Difference]: Finished difference. Result has 118 places, 96 transitions, 434 flow [2024-01-27 23:01:44,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=118, PETRI_TRANSITIONS=96} [2024-01-27 23:01:44,672 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 21 predicate places. [2024-01-27 23:01:44,672 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 96 transitions, 434 flow [2024-01-27 23:01:44,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 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) [2024-01-27 23:01:44,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:44,673 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:44,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 23:01:44,673 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err14ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:44,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:44,674 INFO L85 PathProgramCache]: Analyzing trace with hash -381749064, now seen corresponding path program 1 times [2024-01-27 23:01:44,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:44,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602589188] [2024-01-27 23:01:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:44,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 23:01:44,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:44,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602589188] [2024-01-27 23:01:44,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602589188] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:44,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:44,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 23:01:44,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834425276] [2024-01-27 23:01:44,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:44,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 23:01:44,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 23:01:44,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 23:01:44,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 99 [2024-01-27 23:01:44,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 96 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2024-01-27 23:01:44,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:44,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 99 [2024-01-27 23:01:44,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:46,765 INFO L124 PetriNetUnfolderBase]: 6255/16190 cut-off events. [2024-01-27 23:01:46,765 INFO L125 PetriNetUnfolderBase]: For 21933/21963 co-relation queries the response was YES. [2024-01-27 23:01:46,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40385 conditions, 16190 events. 6255/16190 cut-off events. For 21933/21963 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 139764 event pairs, 1584 based on Foata normal form. 0/15854 useless extension candidates. Maximal degree in co-relation 40353. Up to 7141 conditions per place. [2024-01-27 23:01:46,898 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 138 selfloop transitions, 7 changer transitions 3/184 dead transitions. [2024-01-27 23:01:46,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 184 transitions, 1283 flow [2024-01-27 23:01:46,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 23:01:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 23:01:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 378 transitions. [2024-01-27 23:01:46,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7636363636363637 [2024-01-27 23:01:46,901 INFO L175 Difference]: Start difference. First operand has 118 places, 96 transitions, 434 flow. Second operand 5 states and 378 transitions. [2024-01-27 23:01:46,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 184 transitions, 1283 flow [2024-01-27 23:01:46,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 184 transitions, 1278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:46,939 INFO L231 Difference]: Finished difference. Result has 121 places, 96 transitions, 456 flow [2024-01-27 23:01:46,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=121, PETRI_TRANSITIONS=96} [2024-01-27 23:01:46,941 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 24 predicate places. [2024-01-27 23:01:46,941 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 96 transitions, 456 flow [2024-01-27 23:01:46,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 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) [2024-01-27 23:01:46,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:46,941 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] [2024-01-27 23:01:46,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-27 23:01:46,942 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)] === [2024-01-27 23:01:46,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:46,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2065803520, now seen corresponding path program 1 times [2024-01-27 23:01:46,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:46,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34568408] [2024-01-27 23:01:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:46,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:47,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:47,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34568408] [2024-01-27 23:01:47,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34568408] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:47,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592338335] [2024-01-27 23:01:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:47,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:47,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:47,728 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) [2024-01-27 23:01:47,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 23:01:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:47,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 23:01:47,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:47,871 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 [2024-01-27 23:01:47,976 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 25 treesize of output 1 [2024-01-27 23:01:48,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 80 treesize of output 32 [2024-01-27 23:01:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:48,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:48,858 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 9 treesize of output 1 [2024-01-27 23:01:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:48,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592338335] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:48,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:48,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-01-27 23:01:48,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287566365] [2024-01-27 23:01:48,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:48,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 23:01:48,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:48,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 23:01:48,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-01-27 23:01:49,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:01:49,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 96 transitions, 456 flow. Second operand has 20 states, 20 states have (on average 67.75) internal successors, (1355), 20 states have internal predecessors, (1355), 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) [2024-01-27 23:01:49,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:49,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:01:49,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:54,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 23:01:59,260 INFO L124 PetriNetUnfolderBase]: 9859/29098 cut-off events. [2024-01-27 23:01:59,260 INFO L125 PetriNetUnfolderBase]: For 59468/59468 co-relation queries the response was YES. [2024-01-27 23:01:59,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75354 conditions, 29098 events. 9859/29098 cut-off events. For 59468/59468 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 292864 event pairs, 1057 based on Foata normal form. 96/28538 useless extension candidates. Maximal degree in co-relation 75321. Up to 3464 conditions per place. [2024-01-27 23:01:59,524 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 559 selfloop transitions, 110 changer transitions 19/723 dead transitions. [2024-01-27 23:01:59,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 723 transitions, 5406 flow [2024-01-27 23:01:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-01-27 23:01:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-01-27 23:01:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3623 transitions. [2024-01-27 23:01:59,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7624158249158249 [2024-01-27 23:01:59,536 INFO L175 Difference]: Start difference. First operand has 121 places, 96 transitions, 456 flow. Second operand 48 states and 3623 transitions. [2024-01-27 23:01:59,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 723 transitions, 5406 flow [2024-01-27 23:01:59,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 723 transitions, 5146 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-01-27 23:01:59,615 INFO L231 Difference]: Finished difference. Result has 169 places, 202 transitions, 1258 flow [2024-01-27 23:01:59,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1258, PETRI_PLACES=169, PETRI_TRANSITIONS=202} [2024-01-27 23:01:59,616 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 72 predicate places. [2024-01-27 23:01:59,616 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 202 transitions, 1258 flow [2024-01-27 23:01:59,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 67.75) internal successors, (1355), 20 states have internal predecessors, (1355), 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) [2024-01-27 23:01:59,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:59,617 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] [2024-01-27 23:01:59,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-27 23:01:59,828 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,SelfDestructingSolverStorable13 [2024-01-27 23:01:59,829 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:59,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:59,829 INFO L85 PathProgramCache]: Analyzing trace with hash -712488023, now seen corresponding path program 1 times [2024-01-27 23:01:59,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:59,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094528432] [2024-01-27 23:01:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:59,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:02:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:02:00,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:02:00,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094528432] [2024-01-27 23:02:00,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094528432] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:02:00,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15842630] [2024-01-27 23:02:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:02:00,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:02:00,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:02:00,698 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 23:02:00,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 23:02:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:02:00,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 23:02:00,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:02:00,873 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 [2024-01-27 23:02:01,053 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 [2024-01-27 23:02:01,057 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 [2024-01-27 23:02:01,087 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 75 treesize of output 29 [2024-01-27 23:02:02,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 23:02:02,029 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 [2024-01-27 23:02:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:02:02,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:02:02,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 23:02:02,840 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 1 case distinctions, treesize of input 20 treesize of output 16 [2024-01-27 23:02:02,872 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 23:02:02,873 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 1 case distinctions, treesize of input 18 treesize of output 14 [2024-01-27 23:02:02,915 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2024-01-27 23:02:02,916 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 127 treesize of output 114 [2024-01-27 23:02:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:02:03,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15842630] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:02:03,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:02:03,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-01-27 23:02:03,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972819860] [2024-01-27 23:02:03,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:02:03,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 23:02:03,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:02:03,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 23:02:03,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2024-01-27 23:02:03,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:02:03,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 202 transitions, 1258 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) [2024-01-27 23:02:03,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:02:03,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:02:03,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:02:19,463 INFO L124 PetriNetUnfolderBase]: 24081/70616 cut-off events. [2024-01-27 23:02:19,464 INFO L125 PetriNetUnfolderBase]: For 143804/143804 co-relation queries the response was YES. [2024-01-27 23:02:20,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187412 conditions, 70616 events. 24081/70616 cut-off events. For 143804/143804 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 741822 event pairs, 3601 based on Foata normal form. 314/69414 useless extension candidates. Maximal degree in co-relation 187375. Up to 8200 conditions per place. [2024-01-27 23:02:20,365 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 820 selfloop transitions, 402 changer transitions 76/1333 dead transitions. [2024-01-27 23:02:20,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 1333 transitions, 10569 flow [2024-01-27 23:02:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-01-27 23:02:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-01-27 23:02:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4981 transitions. [2024-01-27 23:02:20,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7623201714110805 [2024-01-27 23:02:20,381 INFO L175 Difference]: Start difference. First operand has 169 places, 202 transitions, 1258 flow. Second operand 66 states and 4981 transitions. [2024-01-27 23:02:20,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 1333 transitions, 10569 flow [2024-01-27 23:02:20,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1333 transitions, 9671 flow, removed 449 selfloop flow, removed 0 redundant places. [2024-01-27 23:02:20,660 INFO L231 Difference]: Finished difference. Result has 263 places, 567 transitions, 4650 flow [2024-01-27 23:02:20,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=4650, PETRI_PLACES=263, PETRI_TRANSITIONS=567} [2024-01-27 23:02:20,661 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 166 predicate places. [2024-01-27 23:02:20,661 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 567 transitions, 4650 flow [2024-01-27 23:02:20,662 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) [2024-01-27 23:02:20,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:02:20,662 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] [2024-01-27 23:02:20,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 23:02:20,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 23:02:20,873 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:02:20,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:02:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash -424551869, now seen corresponding path program 1 times [2024-01-27 23:02:20,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:02:20,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108631367] [2024-01-27 23:02:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:02:20,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:02:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:02:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-27 23:02:21,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:02:21,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108631367] [2024-01-27 23:02:21,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108631367] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:02:21,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716527880] [2024-01-27 23:02:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:02:21,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:02:21,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:02:21,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 23:02:21,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 23:02:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:02:21,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 23:02:21,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:02:21,262 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 [2024-01-27 23:02:21,338 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 [2024-01-27 23:02:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:02:21,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:02:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-01-27 23:02:21,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716527880] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:02:21,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:02:21,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 16 [2024-01-27 23:02:21,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613515502] [2024-01-27 23:02:21,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:02:21,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 23:02:21,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:02:21,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 23:02:21,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-01-27 23:02:21,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:02:21,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 567 transitions, 4650 flow. Second operand has 16 states, 16 states have (on average 69.625) internal successors, (1114), 16 states have internal predecessors, (1114), 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) [2024-01-27 23:02:21,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:02:21,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:02:21,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand