./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 3d25acf6 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-3d25acf-m [2024-01-30 14:15:05,173 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-30 14:15:05,226 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-30 14:15:05,229 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-30 14:15:05,231 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-30 14:15:05,253 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-30 14:15:05,254 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-30 14:15:05,254 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-30 14:15:05,255 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-30 14:15:05,259 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-30 14:15:05,259 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-30 14:15:05,259 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-30 14:15:05,260 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-30 14:15:05,261 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-30 14:15:05,261 INFO L153 SettingsManager]: * Use SBE=true [2024-01-30 14:15:05,262 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-30 14:15:05,262 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-30 14:15:05,262 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-30 14:15:05,262 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-30 14:15:05,262 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-30 14:15:05,263 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-30 14:15:05,263 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-30 14:15:05,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-30 14:15:05,263 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-30 14:15:05,264 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-30 14:15:05,264 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-30 14:15:05,264 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-30 14:15:05,264 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-30 14:15:05,265 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-30 14:15:05,265 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-30 14:15:05,266 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-30 14:15:05,266 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-30 14:15:05,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-30 14:15:05,266 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-30 14:15:05,267 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-30 14:15:05,267 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-30 14:15:05,267 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-30 14:15:05,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-30 14:15:05,267 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-30 14:15:05,267 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-30 14:15:05,268 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-30 14:15:05,268 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-30 14:15:05,268 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-30 14:15:05,268 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-30 14:15:05,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-30 14:15:05,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-30 14:15:05,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-30 14:15:05,560 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-30 14:15:05,560 INFO L274 PluginConnector]: CDTParser initialized [2024-01-30 14:15:05,561 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2024-01-30 14:15:06,572 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-30 14:15:06,796 INFO L384 CDTParser]: Found 1 translation units. [2024-01-30 14:15:06,797 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2024-01-30 14:15:06,807 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb717cc81/c04e0ae9110e427db0261fea78a05083/FLAG096d0820f [2024-01-30 14:15:06,816 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb717cc81/c04e0ae9110e427db0261fea78a05083 [2024-01-30 14:15:06,818 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-30 14:15:06,819 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-30 14:15:06,819 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack-1.yml/witness.yml [2024-01-30 14:15:06,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-30 14:15:06,884 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-30 14:15:06,885 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-30 14:15:06,885 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-30 14:15:06,889 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-30 14:15:06,890 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 02:15:06" (1/2) ... [2024-01-30 14:15:06,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab43f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:06, skipping insertion in model container [2024-01-30 14:15:06,892 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 02:15:06" (1/2) ... [2024-01-30 14:15:06,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@702c4b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:06, skipping insertion in model container [2024-01-30 14:15:06,894 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 30.01 02:15:06" (2/2) ... [2024-01-30 14:15:06,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab43f3b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:06, skipping insertion in model container [2024-01-30 14:15:06,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 30.01 02:15:06" (2/2) ... [2024-01-30 14:15:06,894 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-30 14:15:06,939 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-30 14:15:06,940 INFO L98 nessWitnessExtractor]: Location invariant before [L999-L999] ((unsigned long )arg == 0UL) && ((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || i == 4) [2024-01-30 14:15:06,940 INFO L98 nessWitnessExtractor]: Loop invariant at [L1006-L1015] (unsigned long )arg == 0UL [2024-01-30 14:15:06,940 INFO L98 nessWitnessExtractor]: Location invariant before [L1009-L1013] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-01-30 14:15:06,940 INFO L98 nessWitnessExtractor]: Loop invariant at [L992-L1000] (unsigned long )arg == 0UL [2024-01-30 14:15:06,940 INFO L98 nessWitnessExtractor]: Location invariant before [L1014-L1014] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-01-30 14:15:06,940 INFO L98 nessWitnessExtractor]: Location invariant before [L1016-L1016] (i == 5) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:06,941 INFO L98 nessWitnessExtractor]: Location invariant before [L1008-L1008] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-01-30 14:15:06,941 INFO L98 nessWitnessExtractor]: Location invariant after [L997-L998] ((unsigned long )arg == 0UL) && ((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || i == 4) [2024-01-30 14:15:06,941 INFO L98 nessWitnessExtractor]: Location invariant before [L997-L998] ((unsigned long )arg == 0UL) && (((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) || i == 4) [2024-01-30 14:15:06,941 INFO L98 nessWitnessExtractor]: Location invariant before [L1001-L1001] (i == 5) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:06,941 INFO L98 nessWitnessExtractor]: Location invariant before [L994-L994] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-01-30 14:15:06,941 INFO L98 nessWitnessExtractor]: Location invariant before [L1011-L1012] ((unsigned long )arg == 0UL) && ((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) [2024-01-30 14:15:06,941 INFO L98 nessWitnessExtractor]: Location invariant after [L1011-L1012] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-01-30 14:15:06,942 INFO L98 nessWitnessExtractor]: Location invariant before [L1022-L1022] flag == (_Bool)0 [2024-01-30 14:15:06,942 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L996] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-01-30 14:15:06,942 INFO L98 nessWitnessExtractor]: Location invariant before [L995-L995] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-01-30 14:15:06,942 INFO L98 nessWitnessExtractor]: Location invariant before [L1021-L1021] flag == (_Bool)0 [2024-01-30 14:15:06,966 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-30 14:15:07,266 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] [2024-01-30 14:15:07,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-30 14:15:07,306 INFO L202 MainTranslator]: Completed pre-run [2024-01-30 14:15:07,356 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 [2024-01-30 14:15:07,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-30 14:15:07,456 INFO L206 MainTranslator]: Completed translation [2024-01-30 14:15:07,457 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:07 WrapperNode [2024-01-30 14:15:07,457 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-30 14:15:07,458 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-30 14:15:07,458 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-30 14:15:07,458 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-30 14:15:07,463 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 30.01 02:15:07" (1/1) ... [2024-01-30 14:15:07,497 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 30.01 02:15:07" (1/1) ... [2024-01-30 14:15:07,533 INFO L138 Inliner]: procedures = 278, calls = 45, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 179 [2024-01-30 14:15:07,534 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-30 14:15:07,534 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-30 14:15:07,534 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-30 14:15:07,534 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-30 14:15:07,543 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:07" (1/1) ... [2024-01-30 14:15:07,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:07" (1/1) ... [2024-01-30 14:15:07,547 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:07" (1/1) ... [2024-01-30 14:15:07,559 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 7, 5, 2, 2]. 39 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0, 0]. The 3 writes are split as follows [0, 1, 0, 1, 1]. [2024-01-30 14:15:07,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:07" (1/1) ... [2024-01-30 14:15:07,565 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:07" (1/1) ... [2024-01-30 14:15:07,572 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:07" (1/1) ... [2024-01-30 14:15:07,583 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:07" (1/1) ... [2024-01-30 14:15:07,586 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:07" (1/1) ... [2024-01-30 14:15:07,596 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:07" (1/1) ... [2024-01-30 14:15:07,599 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-30 14:15:07,600 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-30 14:15:07,600 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-30 14:15:07,600 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-30 14:15:07,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:07" (1/1) ... [2024-01-30 14:15:07,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-30 14:15:07,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:07,637 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) [2024-01-30 14:15:07,656 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 [2024-01-30 14:15:07,691 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-30 14:15:07,691 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-30 14:15:07,691 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-30 14:15:07,692 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-30 14:15:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-30 14:15:07,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-30 14:15:07,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-30 14:15:07,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-30 14:15:07,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-30 14:15:07,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-30 14:15:07,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-30 14:15:07,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-30 14:15:07,694 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-30 14:15:07,853 INFO L244 CfgBuilder]: Building ICFG [2024-01-30 14:15:07,854 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-30 14:15:08,150 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-30 14:15:08,151 INFO L293 CfgBuilder]: Performing block encoding [2024-01-30 14:15:08,318 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-30 14:15:08,328 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-30 14:15:08,328 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 02:15:08 BoogieIcfgContainer [2024-01-30 14:15:08,328 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-30 14:15:08,330 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-30 14:15:08,330 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-30 14:15:08,332 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-30 14:15:08,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 02:15:06" (1/4) ... [2024-01-30 14:15:08,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d193a3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 02:15:08, skipping insertion in model container [2024-01-30 14:15:08,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 30.01 02:15:06" (2/4) ... [2024-01-30 14:15:08,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d193a3f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 30.01 02:15:08, skipping insertion in model container [2024-01-30 14:15:08,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:07" (3/4) ... [2024-01-30 14:15:08,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d193a3f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 30.01 02:15:08, skipping insertion in model container [2024-01-30 14:15:08,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 02:15:08" (4/4) ... [2024-01-30 14:15:08,335 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-01-30 14:15:08,350 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-30 14:15:08,350 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2024-01-30 14:15:08,350 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-30 14:15:08,459 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-30 14:15:08,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 160 flow [2024-01-30 14:15:08,538 INFO L124 PetriNetUnfolderBase]: 5/71 cut-off events. [2024-01-30 14:15:08,539 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-30 14:15:08,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 5/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 214 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2024-01-30 14:15:08,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 160 flow [2024-01-30 14:15:08,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 147 flow [2024-01-30 14:15:08,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-30 14:15:08,566 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;@6e5e806a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-30 14:15:08,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2024-01-30 14:15:08,568 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-30 14:15:08,569 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-30 14:15:08,569 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-30 14:15:08,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:08,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-30 14:15:08,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:08,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash 14693, now seen corresponding path program 1 times [2024-01-30 14:15:08,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:08,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677470274] [2024-01-30 14:15:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:08,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:08,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:08,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677470274] [2024-01-30 14:15:08,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677470274] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:08,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:08,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-30 14:15:08,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901262113] [2024-01-30 14:15:08,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:08,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-30 14:15:08,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-30 14:15:08,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-30 14:15:08,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:08,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2024-01-30 14:15:08,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:08,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:08,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:09,134 INFO L124 PetriNetUnfolderBase]: 468/1276 cut-off events. [2024-01-30 14:15:09,134 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-01-30 14:15:09,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2050 conditions, 1276 events. 468/1276 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 8641 event pairs, 357 based on Foata normal form. 48/1021 useless extension candidates. Maximal degree in co-relation 1918. Up to 734 conditions per place. [2024-01-30 14:15:09,154 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 28 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2024-01-30 14:15:09,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 197 flow [2024-01-30 14:15:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-30 14:15:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-30 14:15:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-01-30 14:15:09,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6712328767123288 [2024-01-30 14:15:09,204 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 147 flow. Second operand 3 states and 147 transitions. [2024-01-30 14:15:09,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 197 flow [2024-01-30 14:15:09,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 65 transitions, 192 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-30 14:15:09,212 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 136 flow [2024-01-30 14:15:09,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-01-30 14:15:09,216 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2024-01-30 14:15:09,216 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 136 flow [2024-01-30 14:15:09,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2024-01-30 14:15:09,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:09,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-30 14:15:09,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-30 14:15:09,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:09,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:09,218 INFO L85 PathProgramCache]: Analyzing trace with hash 699513165, now seen corresponding path program 1 times [2024-01-30 14:15:09,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:09,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336776462] [2024-01-30 14:15:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:09,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:09,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336776462] [2024-01-30 14:15:09,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336776462] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:09,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:09,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548998832] [2024-01-30 14:15:09,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:09,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:09,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:09,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:09,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:09,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:09,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 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) [2024-01-30 14:15:09,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:09,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:09,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:09,518 INFO L124 PetriNetUnfolderBase]: 383/1012 cut-off events. [2024-01-30 14:15:09,519 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-30 14:15:09,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1685 conditions, 1012 events. 383/1012 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6808 event pairs, 9 based on Foata normal form. 44/920 useless extension candidates. Maximal degree in co-relation 1679. Up to 610 conditions per place. [2024-01-30 14:15:09,523 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 39 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-01-30 14:15:09,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 240 flow [2024-01-30 14:15:09,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-01-30 14:15:09,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678082191780822 [2024-01-30 14:15:09,526 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 136 flow. Second operand 4 states and 195 transitions. [2024-01-30 14:15:09,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 240 flow [2024-01-30 14:15:09,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-30 14:15:09,527 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 135 flow [2024-01-30 14:15:09,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2024-01-30 14:15:09,528 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2024-01-30 14:15:09,528 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 135 flow [2024-01-30 14:15:09,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 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) [2024-01-30 14:15:09,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:09,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:09,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-30 14:15:09,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:09,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2077697808, now seen corresponding path program 1 times [2024-01-30 14:15:09,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:09,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406048686] [2024-01-30 14:15:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:09,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:09,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:09,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406048686] [2024-01-30 14:15:09,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406048686] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:09,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:09,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:09,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547167493] [2024-01-30 14:15:09,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:09,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:09,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:09,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:09,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 73 [2024-01-30 14:15:09,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2024-01-30 14:15:09,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:09,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 73 [2024-01-30 14:15:09,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:09,924 INFO L124 PetriNetUnfolderBase]: 1123/2314 cut-off events. [2024-01-30 14:15:09,924 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-01-30 14:15:09,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4266 conditions, 2314 events. 1123/2314 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 14619 event pairs, 695 based on Foata normal form. 22/1942 useless extension candidates. Maximal degree in co-relation 4260. Up to 1177 conditions per place. [2024-01-30 14:15:09,936 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 72 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2024-01-30 14:15:09,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 359 flow [2024-01-30 14:15:09,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2024-01-30 14:15:09,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6506849315068494 [2024-01-30 14:15:09,941 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 135 flow. Second operand 4 states and 190 transitions. [2024-01-30 14:15:09,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 359 flow [2024-01-30 14:15:09,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:09,944 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 158 flow [2024-01-30 14:15:09,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-01-30 14:15:09,945 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2024-01-30 14:15:09,946 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 158 flow [2024-01-30 14:15:09,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2024-01-30 14:15:09,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:09,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:09,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-30 14:15:09,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:09,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:09,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2078534008, now seen corresponding path program 1 times [2024-01-30 14:15:09,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:09,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922798360] [2024-01-30 14:15:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:09,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:10,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:10,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922798360] [2024-01-30 14:15:10,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922798360] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:10,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:10,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:10,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410757186] [2024-01-30 14:15:10,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:10,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:10,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:10,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:10,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:10,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2024-01-30 14:15:10,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:10,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:10,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:10,295 INFO L124 PetriNetUnfolderBase]: 705/1650 cut-off events. [2024-01-30 14:15:10,295 INFO L125 PetriNetUnfolderBase]: For 49/69 co-relation queries the response was YES. [2024-01-30 14:15:10,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3085 conditions, 1650 events. 705/1650 cut-off events. For 49/69 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 10698 event pairs, 306 based on Foata normal form. 100/1600 useless extension candidates. Maximal degree in co-relation 3078. Up to 999 conditions per place. [2024-01-30 14:15:10,302 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 55 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2024-01-30 14:15:10,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 343 flow [2024-01-30 14:15:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 208 transitions. [2024-01-30 14:15:10,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7123287671232876 [2024-01-30 14:15:10,303 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 158 flow. Second operand 4 states and 208 transitions. [2024-01-30 14:15:10,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 343 flow [2024-01-30 14:15:10,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 333 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:10,307 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 154 flow [2024-01-30 14:15:10,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-01-30 14:15:10,309 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2024-01-30 14:15:10,309 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 154 flow [2024-01-30 14:15:10,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2024-01-30 14:15:10,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:10,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:10,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-30 14:15:10,310 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:10,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:10,311 INFO L85 PathProgramCache]: Analyzing trace with hash -311372021, now seen corresponding path program 1 times [2024-01-30 14:15:10,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:10,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565030277] [2024-01-30 14:15:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:10,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:10,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:10,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565030277] [2024-01-30 14:15:10,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565030277] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:10,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:10,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:10,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380279402] [2024-01-30 14:15:10,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:10,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:10,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:10,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 73 [2024-01-30 14:15:10,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2024-01-30 14:15:10,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:10,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 73 [2024-01-30 14:15:10,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:10,715 INFO L124 PetriNetUnfolderBase]: 1821/3712 cut-off events. [2024-01-30 14:15:10,715 INFO L125 PetriNetUnfolderBase]: For 186/270 co-relation queries the response was YES. [2024-01-30 14:15:10,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7200 conditions, 3712 events. 1821/3712 cut-off events. For 186/270 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 24119 event pairs, 1208 based on Foata normal form. 96/3346 useless extension candidates. Maximal degree in co-relation 7193. Up to 1908 conditions per place. [2024-01-30 14:15:10,733 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 78 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2024-01-30 14:15:10,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 102 transitions, 412 flow [2024-01-30 14:15:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-01-30 14:15:10,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6575342465753424 [2024-01-30 14:15:10,735 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 154 flow. Second operand 4 states and 192 transitions. [2024-01-30 14:15:10,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 102 transitions, 412 flow [2024-01-30 14:15:10,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 409 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:10,738 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 175 flow [2024-01-30 14:15:10,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2024-01-30 14:15:10,740 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2024-01-30 14:15:10,740 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 175 flow [2024-01-30 14:15:10,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2024-01-30 14:15:10,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:10,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:10,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-30 14:15:10,741 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:10,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:10,741 INFO L85 PathProgramCache]: Analyzing trace with hash 284823668, now seen corresponding path program 1 times [2024-01-30 14:15:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:10,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610572044] [2024-01-30 14:15:10,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:10,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:10,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:10,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610572044] [2024-01-30 14:15:10,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610572044] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:10,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:10,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150150033] [2024-01-30 14:15:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:10,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:10,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:10,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:10,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:10,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 73 [2024-01-30 14:15:10,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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) [2024-01-30 14:15:10,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:10,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 73 [2024-01-30 14:15:10,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:11,074 INFO L124 PetriNetUnfolderBase]: 925/2294 cut-off events. [2024-01-30 14:15:11,074 INFO L125 PetriNetUnfolderBase]: For 166/238 co-relation queries the response was YES. [2024-01-30 14:15:11,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4484 conditions, 2294 events. 925/2294 cut-off events. For 166/238 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 15936 event pairs, 116 based on Foata normal form. 66/2259 useless extension candidates. Maximal degree in co-relation 4476. Up to 1225 conditions per place. [2024-01-30 14:15:11,086 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 58 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2024-01-30 14:15:11,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 379 flow [2024-01-30 14:15:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-01-30 14:15:11,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7363013698630136 [2024-01-30 14:15:11,087 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 175 flow. Second operand 4 states and 215 transitions. [2024-01-30 14:15:11,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 379 flow [2024-01-30 14:15:11,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 92 transitions, 369 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:11,092 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 193 flow [2024-01-30 14:15:11,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2024-01-30 14:15:11,094 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2024-01-30 14:15:11,095 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 193 flow [2024-01-30 14:15:11,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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) [2024-01-30 14:15:11,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:11,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:11,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-30 14:15:11,095 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:11,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:11,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1740295158, now seen corresponding path program 1 times [2024-01-30 14:15:11,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:11,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778864964] [2024-01-30 14:15:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:11,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:11,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:11,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778864964] [2024-01-30 14:15:11,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778864964] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-30 14:15:11,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294755471] [2024-01-30 14:15:11,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:11,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:11,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:11,221 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) [2024-01-30 14:15:11,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-30 14:15:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:11,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-30 14:15:11,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-30 14:15:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:11,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-30 14:15:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:11,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294755471] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-30 14:15:11,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-30 14:15:11,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-30 14:15:11,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639717775] [2024-01-30 14:15:11,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-30 14:15:11,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-30 14:15:11,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:11,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-30 14:15:11,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-30 14:15:11,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 73 [2024-01-30 14:15:11,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 193 flow. Second operand has 10 states, 10 states have (on average 29.4) internal successors, (294), 10 states have internal predecessors, (294), 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) [2024-01-30 14:15:11,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:11,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 73 [2024-01-30 14:15:11,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:12,429 INFO L124 PetriNetUnfolderBase]: 2721/5170 cut-off events. [2024-01-30 14:15:12,429 INFO L125 PetriNetUnfolderBase]: For 1187/1351 co-relation queries the response was YES. [2024-01-30 14:15:12,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11169 conditions, 5170 events. 2721/5170 cut-off events. For 1187/1351 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 31288 event pairs, 51 based on Foata normal form. 698/5646 useless extension candidates. Maximal degree in co-relation 11158. Up to 1027 conditions per place. [2024-01-30 14:15:12,456 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 171 selfloop transitions, 7 changer transitions 0/198 dead transitions. [2024-01-30 14:15:12,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 198 transitions, 935 flow [2024-01-30 14:15:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-30 14:15:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-30 14:15:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 383 transitions. [2024-01-30 14:15:12,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6558219178082192 [2024-01-30 14:15:12,458 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 193 flow. Second operand 8 states and 383 transitions. [2024-01-30 14:15:12,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 198 transitions, 935 flow [2024-01-30 14:15:12,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 198 transitions, 927 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-30 14:15:12,462 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 212 flow [2024-01-30 14:15:12,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=212, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2024-01-30 14:15:12,463 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 8 predicate places. [2024-01-30 14:15:12,463 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 212 flow [2024-01-30 14:15:12,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.4) internal successors, (294), 10 states have internal predecessors, (294), 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) [2024-01-30 14:15:12,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:12,463 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:12,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-30 14:15:12,674 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 [2024-01-30 14:15:12,675 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:12,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1221116421, now seen corresponding path program 1 times [2024-01-30 14:15:12,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:12,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409959097] [2024-01-30 14:15:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:12,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:12,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:12,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409959097] [2024-01-30 14:15:12,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409959097] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-30 14:15:12,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355750219] [2024-01-30 14:15:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:12,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:12,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:12,812 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) [2024-01-30 14:15:12,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-30 14:15:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:12,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-30 14:15:12,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-30 14:15:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:12,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-30 14:15:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:13,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355750219] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-30 14:15:13,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-30 14:15:13,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-30 14:15:13,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158202159] [2024-01-30 14:15:13,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-30 14:15:13,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-30 14:15:13,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:13,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-30 14:15:13,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-30 14:15:13,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 73 [2024-01-30 14:15:13,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 212 flow. Second operand has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 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) [2024-01-30 14:15:13,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:13,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 73 [2024-01-30 14:15:13,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:14,337 INFO L124 PetriNetUnfolderBase]: 4891/8705 cut-off events. [2024-01-30 14:15:14,337 INFO L125 PetriNetUnfolderBase]: For 5223/5334 co-relation queries the response was YES. [2024-01-30 14:15:14,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19856 conditions, 8705 events. 4891/8705 cut-off events. For 5223/5334 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 56091 event pairs, 135 based on Foata normal form. 1329/9315 useless extension candidates. Maximal degree in co-relation 19841. Up to 2016 conditions per place. [2024-01-30 14:15:14,389 INFO L140 encePairwiseOnDemand]: 62/73 looper letters, 154 selfloop transitions, 7 changer transitions 0/177 dead transitions. [2024-01-30 14:15:14,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 177 transitions, 982 flow [2024-01-30 14:15:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-30 14:15:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-30 14:15:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 369 transitions. [2024-01-30 14:15:14,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318493150684932 [2024-01-30 14:15:14,391 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 212 flow. Second operand 8 states and 369 transitions. [2024-01-30 14:15:14,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 177 transitions, 982 flow [2024-01-30 14:15:14,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 177 transitions, 917 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-01-30 14:15:14,398 INFO L231 Difference]: Finished difference. Result has 81 places, 60 transitions, 218 flow [2024-01-30 14:15:14,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=218, PETRI_PLACES=81, PETRI_TRANSITIONS=60} [2024-01-30 14:15:14,399 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 10 predicate places. [2024-01-30 14:15:14,399 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 60 transitions, 218 flow [2024-01-30 14:15:14,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 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) [2024-01-30 14:15:14,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:14,400 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] [2024-01-30 14:15:14,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-30 14:15:14,612 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 [2024-01-30 14:15:14,613 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:14,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:14,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1224163490, now seen corresponding path program 1 times [2024-01-30 14:15:14,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:14,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202870655] [2024-01-30 14:15:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:14,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:14,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:14,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202870655] [2024-01-30 14:15:14,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202870655] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:14,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:14,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:14,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626927791] [2024-01-30 14:15:14,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:14,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-30 14:15:14,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:14,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-30 14:15:14,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-30 14:15:14,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 73 [2024-01-30 14:15:14,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 60 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-01-30 14:15:14,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:14,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 73 [2024-01-30 14:15:14,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:15,135 INFO L124 PetriNetUnfolderBase]: 1613/4263 cut-off events. [2024-01-30 14:15:15,136 INFO L125 PetriNetUnfolderBase]: For 4050/4148 co-relation queries the response was YES. [2024-01-30 14:15:15,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9602 conditions, 4263 events. 1613/4263 cut-off events. For 4050/4148 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 26996 event pairs, 429 based on Foata normal form. 398/4475 useless extension candidates. Maximal degree in co-relation 9583. Up to 2028 conditions per place. [2024-01-30 14:15:15,165 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 52 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-01-30 14:15:15,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 430 flow [2024-01-30 14:15:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-30 14:15:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-30 14:15:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2024-01-30 14:15:15,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7488584474885844 [2024-01-30 14:15:15,167 INFO L175 Difference]: Start difference. First operand has 81 places, 60 transitions, 218 flow. Second operand 3 states and 164 transitions. [2024-01-30 14:15:15,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 430 flow [2024-01-30 14:15:15,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 410 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-01-30 14:15:15,173 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 215 flow [2024-01-30 14:15:15,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2024-01-30 14:15:15,174 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2024-01-30 14:15:15,174 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 215 flow [2024-01-30 14:15:15,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-01-30 14:15:15,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:15,175 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:15,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-30 14:15:15,175 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:15,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:15,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1066203401, now seen corresponding path program 1 times [2024-01-30 14:15:15,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:15,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673089909] [2024-01-30 14:15:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:15,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:15,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:15,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673089909] [2024-01-30 14:15:15,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673089909] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-30 14:15:15,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540281726] [2024-01-30 14:15:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:15,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:15,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:15,366 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) [2024-01-30 14:15:15,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-30 14:15:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:15,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-30 14:15:15,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-30 14:15:15,509 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 [2024-01-30 14:15:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:15,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-30 14:15:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:15,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540281726] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-30 14:15:15,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-30 14:15:15,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-01-30 14:15:15,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322458114] [2024-01-30 14:15:15,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-30 14:15:15,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-30 14:15:15,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:15,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-30 14:15:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-01-30 14:15:15,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:15,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 215 flow. Second operand has 9 states, 9 states have (on average 43.44444444444444) internal successors, (391), 9 states have internal predecessors, (391), 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) [2024-01-30 14:15:15,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:15,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:15,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:17,111 INFO L124 PetriNetUnfolderBase]: 4997/12840 cut-off events. [2024-01-30 14:15:17,111 INFO L125 PetriNetUnfolderBase]: For 12180/12288 co-relation queries the response was YES. [2024-01-30 14:15:17,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30654 conditions, 12840 events. 4997/12840 cut-off events. For 12180/12288 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 109131 event pairs, 995 based on Foata normal form. 222/12757 useless extension candidates. Maximal degree in co-relation 30635. Up to 1911 conditions per place. [2024-01-30 14:15:17,215 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 203 selfloop transitions, 19 changer transitions 0/243 dead transitions. [2024-01-30 14:15:17,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 243 transitions, 1458 flow [2024-01-30 14:15:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-30 14:15:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-30 14:15:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 636 transitions. [2024-01-30 14:15:17,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.726027397260274 [2024-01-30 14:15:17,217 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 215 flow. Second operand 12 states and 636 transitions. [2024-01-30 14:15:17,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 243 transitions, 1458 flow [2024-01-30 14:15:17,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 243 transitions, 1436 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-30 14:15:17,245 INFO L231 Difference]: Finished difference. Result has 96 places, 78 transitions, 345 flow [2024-01-30 14:15:17,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=345, PETRI_PLACES=96, PETRI_TRANSITIONS=78} [2024-01-30 14:15:17,246 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 25 predicate places. [2024-01-30 14:15:17,246 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 78 transitions, 345 flow [2024-01-30 14:15:17,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 43.44444444444444) internal successors, (391), 9 states have internal predecessors, (391), 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) [2024-01-30 14:15:17,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:17,246 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] [2024-01-30 14:15:17,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-30 14:15:17,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:17,458 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:17,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:17,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1867355027, now seen corresponding path program 1 times [2024-01-30 14:15:17,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:17,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035901048] [2024-01-30 14:15:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:17,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:18,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:18,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035901048] [2024-01-30 14:15:18,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035901048] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:18,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:18,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-30 14:15:18,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343996785] [2024-01-30 14:15:18,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:18,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-30 14:15:18,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:18,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-30 14:15:18,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-30 14:15:18,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:18,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 78 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 40.57142857142857) internal successors, (284), 7 states have internal predecessors, (284), 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) [2024-01-30 14:15:18,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:18,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:18,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:19,496 INFO L124 PetriNetUnfolderBase]: 4837/12258 cut-off events. [2024-01-30 14:15:19,496 INFO L125 PetriNetUnfolderBase]: For 15224/15332 co-relation queries the response was YES. [2024-01-30 14:15:19,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30932 conditions, 12258 events. 4837/12258 cut-off events. For 15224/15332 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 102634 event pairs, 1655 based on Foata normal form. 124/12093 useless extension candidates. Maximal degree in co-relation 30905. Up to 7309 conditions per place. [2024-01-30 14:15:19,591 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 111 selfloop transitions, 7 changer transitions 0/139 dead transitions. [2024-01-30 14:15:19,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 139 transitions, 847 flow [2024-01-30 14:15:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-30 14:15:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-30 14:15:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 352 transitions. [2024-01-30 14:15:19,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888454011741683 [2024-01-30 14:15:19,593 INFO L175 Difference]: Start difference. First operand has 96 places, 78 transitions, 345 flow. Second operand 7 states and 352 transitions. [2024-01-30 14:15:19,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 139 transitions, 847 flow [2024-01-30 14:15:19,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 139 transitions, 833 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-30 14:15:19,618 INFO L231 Difference]: Finished difference. Result has 105 places, 83 transitions, 392 flow [2024-01-30 14:15:19,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=392, PETRI_PLACES=105, PETRI_TRANSITIONS=83} [2024-01-30 14:15:19,618 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 34 predicate places. [2024-01-30 14:15:19,619 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 83 transitions, 392 flow [2024-01-30 14:15:19,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.57142857142857) internal successors, (284), 7 states have internal predecessors, (284), 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) [2024-01-30 14:15:19,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:19,619 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, 1, 1, 1, 1, 1] [2024-01-30 14:15:19,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-30 14:15:19,620 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:19,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:19,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1880210762, now seen corresponding path program 1 times [2024-01-30 14:15:19,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:19,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533881815] [2024-01-30 14:15:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:19,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:20,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:20,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533881815] [2024-01-30 14:15:20,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533881815] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-30 14:15:20,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395711792] [2024-01-30 14:15:20,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:20,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:20,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:20,281 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) [2024-01-30 14:15:20,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-30 14:15:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:20,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-30 14:15:20,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-30 14:15:20,448 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 [2024-01-30 14:15:20,540 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 [2024-01-30 14:15:20,634 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 [2024-01-30 14:15:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:20,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-30 14:15:21,030 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 [2024-01-30 14:15:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:21,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395711792] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-30 14:15:21,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-30 14:15:21,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-01-30 14:15:21,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770616108] [2024-01-30 14:15:21,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-30 14:15:21,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-30 14:15:21,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:21,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-30 14:15:21,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-01-30 14:15:21,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:21,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 83 transitions, 392 flow. Second operand has 21 states, 21 states have (on average 41.57142857142857) internal successors, (873), 21 states have internal predecessors, (873), 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) [2024-01-30 14:15:21,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:21,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:21,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:26,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-30 14:15:30,478 INFO L124 PetriNetUnfolderBase]: 9835/24234 cut-off events. [2024-01-30 14:15:30,478 INFO L125 PetriNetUnfolderBase]: For 32698/32846 co-relation queries the response was YES. [2024-01-30 14:15:30,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63521 conditions, 24234 events. 9835/24234 cut-off events. For 32698/32846 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 226243 event pairs, 1099 based on Foata normal form. 169/24162 useless extension candidates. Maximal degree in co-relation 63489. Up to 3520 conditions per place. [2024-01-30 14:15:30,686 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 664 selfloop transitions, 111 changer transitions 0/796 dead transitions. [2024-01-30 14:15:30,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 796 transitions, 5357 flow [2024-01-30 14:15:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-01-30 14:15:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-01-30 14:15:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3016 transitions. [2024-01-30 14:15:30,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557947379865188 [2024-01-30 14:15:30,698 INFO L175 Difference]: Start difference. First operand has 105 places, 83 transitions, 392 flow. Second operand 63 states and 3016 transitions. [2024-01-30 14:15:30,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 796 transitions, 5357 flow [2024-01-30 14:15:30,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 796 transitions, 5354 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-30 14:15:30,769 INFO L231 Difference]: Finished difference. Result has 173 places, 189 transitions, 1188 flow [2024-01-30 14:15:30,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1188, PETRI_PLACES=173, PETRI_TRANSITIONS=189} [2024-01-30 14:15:30,769 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 102 predicate places. [2024-01-30 14:15:30,770 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 189 transitions, 1188 flow [2024-01-30 14:15:30,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 41.57142857142857) internal successors, (873), 21 states have internal predecessors, (873), 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) [2024-01-30 14:15:30,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:30,770 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:30,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-30 14:15:30,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:30,982 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err8ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:30,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:30,983 INFO L85 PathProgramCache]: Analyzing trace with hash -27529128, now seen corresponding path program 1 times [2024-01-30 14:15:30,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:30,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730104338] [2024-01-30 14:15:30,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:30,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-01-30 14:15:31,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:31,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730104338] [2024-01-30 14:15:31,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730104338] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:31,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:31,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-30 14:15:31,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527814425] [2024-01-30 14:15:31,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:31,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-30 14:15:31,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:31,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-30 14:15:31,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-30 14:15:31,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 73 [2024-01-30 14:15:31,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 189 transitions, 1188 flow. Second operand has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:31,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:31,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 73 [2024-01-30 14:15:31,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:35,895 INFO L124 PetriNetUnfolderBase]: 18190/36711 cut-off events. [2024-01-30 14:15:35,895 INFO L125 PetriNetUnfolderBase]: For 50831/51001 co-relation queries the response was YES. [2024-01-30 14:15:36,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104373 conditions, 36711 events. 18190/36711 cut-off events. For 50831/51001 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 320084 event pairs, 4505 based on Foata normal form. 74/36518 useless extension candidates. Maximal degree in co-relation 104333. Up to 17498 conditions per place. [2024-01-30 14:15:36,388 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 396 selfloop transitions, 9 changer transitions 3/453 dead transitions. [2024-01-30 14:15:36,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 453 transitions, 3636 flow [2024-01-30 14:15:36,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-30 14:15:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-30 14:15:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 274 transitions. [2024-01-30 14:15:36,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6255707762557078 [2024-01-30 14:15:36,390 INFO L175 Difference]: Start difference. First operand has 173 places, 189 transitions, 1188 flow. Second operand 6 states and 274 transitions. [2024-01-30 14:15:36,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 453 transitions, 3636 flow [2024-01-30 14:15:36,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 453 transitions, 3112 flow, removed 230 selfloop flow, removed 8 redundant places. [2024-01-30 14:15:36,839 INFO L231 Difference]: Finished difference. Result has 169 places, 189 transitions, 974 flow [2024-01-30 14:15:36,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=974, PETRI_PLACES=169, PETRI_TRANSITIONS=189} [2024-01-30 14:15:36,841 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 98 predicate places. [2024-01-30 14:15:36,841 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 189 transitions, 974 flow [2024-01-30 14:15:36,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:36,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:36,842 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2024-01-30 14:15:36,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-30 14:15:36,842 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:36,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:36,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1651264677, now seen corresponding path program 1 times [2024-01-30 14:15:36,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:36,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766293605] [2024-01-30 14:15:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:36,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-30 14:15:37,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:37,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766293605] [2024-01-30 14:15:37,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766293605] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-30 14:15:37,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020897395] [2024-01-30 14:15:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:37,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:37,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:37,070 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) [2024-01-30 14:15:37,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-30 14:15:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:37,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-30 14:15:37,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-30 14:15:37,232 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 [2024-01-30 14:15:37,287 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 [2024-01-30 14:15:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:37,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-30 14:15:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-30 14:15:37,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020897395] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-30 14:15:37,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-30 14:15:37,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 11 [2024-01-30 14:15:37,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479908336] [2024-01-30 14:15:37,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-30 14:15:37,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-30 14:15:37,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:37,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-30 14:15:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-01-30 14:15:37,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:37,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 189 transitions, 974 flow. Second operand has 11 states, 11 states have (on average 43.63636363636363) internal successors, (480), 11 states have internal predecessors, (480), 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) [2024-01-30 14:15:37,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:37,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:37,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:43,018 INFO L124 PetriNetUnfolderBase]: 15509/37972 cut-off events. [2024-01-30 14:15:43,019 INFO L125 PetriNetUnfolderBase]: For 74441/74481 co-relation queries the response was YES. [2024-01-30 14:15:43,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106935 conditions, 37972 events. 15509/37972 cut-off events. For 74441/74481 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 377344 event pairs, 2121 based on Foata normal form. 698/38463 useless extension candidates. Maximal degree in co-relation 106899. Up to 5528 conditions per place. [2024-01-30 14:15:43,426 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 512 selfloop transitions, 128 changer transitions 2/663 dead transitions. [2024-01-30 14:15:43,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 663 transitions, 4846 flow [2024-01-30 14:15:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-30 14:15:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-30 14:15:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1408 transitions. [2024-01-30 14:15:43,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7143581938102486 [2024-01-30 14:15:43,432 INFO L175 Difference]: Start difference. First operand has 169 places, 189 transitions, 974 flow. Second operand 27 states and 1408 transitions. [2024-01-30 14:15:43,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 663 transitions, 4846 flow [2024-01-30 14:15:43,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 663 transitions, 4634 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-01-30 14:15:43,799 INFO L231 Difference]: Finished difference. Result has 204 places, 251 transitions, 1790 flow [2024-01-30 14:15:43,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1790, PETRI_PLACES=204, PETRI_TRANSITIONS=251} [2024-01-30 14:15:43,800 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 133 predicate places. [2024-01-30 14:15:43,800 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 251 transitions, 1790 flow [2024-01-30 14:15:43,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 43.63636363636363) internal successors, (480), 11 states have internal predecessors, (480), 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) [2024-01-30 14:15:43,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:43,800 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-01-30 14:15:43,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-30 14:15:44,011 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 [2024-01-30 14:15:44,012 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:44,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:44,012 INFO L85 PathProgramCache]: Analyzing trace with hash 745957698, now seen corresponding path program 1 times [2024-01-30 14:15:44,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:44,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78464212] [2024-01-30 14:15:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:44,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:44,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:44,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78464212] [2024-01-30 14:15:44,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78464212] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-30 14:15:44,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100597334] [2024-01-30 14:15:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:44,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:44,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:44,939 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) [2024-01-30 14:15:44,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-30 14:15:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:45,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-30 14:15:45,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-30 14:15:45,116 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 [2024-01-30 14:15:45,370 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 50 treesize of output 19 [2024-01-30 14:15:45,569 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 56 treesize of output 32 [2024-01-30 14:15:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:45,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-30 14:15:46,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-30 14:15:46,037 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 16 treesize of output 12 [2024-01-30 14:15:46,099 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2024-01-30 14:15:46,099 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 124 treesize of output 111 [2024-01-30 14:15:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:46,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100597334] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-30 14:15:46,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-30 14:15:46,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-01-30 14:15:46,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654779722] [2024-01-30 14:15:46,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-30 14:15:46,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-30 14:15:46,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:46,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-30 14:15:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2024-01-30 14:15:46,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:46,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 251 transitions, 1790 flow. Second operand has 25 states, 25 states have (on average 41.72) internal successors, (1043), 25 states have internal predecessors, (1043), 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) [2024-01-30 14:15:46,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:46,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:46,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:00,030 INFO L124 PetriNetUnfolderBase]: 28003/67648 cut-off events. [2024-01-30 14:16:00,031 INFO L125 PetriNetUnfolderBase]: For 149368/149408 co-relation queries the response was YES. [2024-01-30 14:16:00,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201471 conditions, 67648 events. 28003/67648 cut-off events. For 149368/149408 co-relation queries the response was YES. Maximal size of possible extension queue 904. Compared 705489 event pairs, 3569 based on Foata normal form. 414/67626 useless extension candidates. Maximal degree in co-relation 201419. Up to 9794 conditions per place. [2024-01-30 14:16:01,097 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 779 selfloop transitions, 348 changer transitions 61/1209 dead transitions. [2024-01-30 14:16:01,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 1209 transitions, 9776 flow [2024-01-30 14:16:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-01-30 14:16:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-01-30 14:16:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 2978 transitions. [2024-01-30 14:16:01,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6799086757990868 [2024-01-30 14:16:01,102 INFO L175 Difference]: Start difference. First operand has 204 places, 251 transitions, 1790 flow. Second operand 60 states and 2978 transitions. [2024-01-30 14:16:01,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 1209 transitions, 9776 flow [2024-01-30 14:16:01,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1209 transitions, 9684 flow, removed 46 selfloop flow, removed 0 redundant places. [2024-01-30 14:16:01,966 INFO L231 Difference]: Finished difference. Result has 287 places, 479 transitions, 4573 flow [2024-01-30 14:16:01,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1726, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=4573, PETRI_PLACES=287, PETRI_TRANSITIONS=479} [2024-01-30 14:16:01,967 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 216 predicate places. [2024-01-30 14:16:01,967 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 479 transitions, 4573 flow [2024-01-30 14:16:01,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 41.72) internal successors, (1043), 25 states have internal predecessors, (1043), 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) [2024-01-30 14:16:01,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:01,968 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:16:01,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-30 14:16:02,168 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 [2024-01-30 14:16:02,169 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err9ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:16:02,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:02,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1759128367, now seen corresponding path program 1 times [2024-01-30 14:16:02,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:02,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372168770] [2024-01-30 14:16:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:02,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-01-30 14:16:02,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:02,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372168770] [2024-01-30 14:16:02,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372168770] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:02,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:02,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-30 14:16:02,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119867613] [2024-01-30 14:16:02,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:02,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-30 14:16:02,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:02,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-30 14:16:02,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-30 14:16:02,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 73 [2024-01-30 14:16:02,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 479 transitions, 4573 flow. Second operand has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 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) [2024-01-30 14:16:02,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:02,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 73 [2024-01-30 14:16:02,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand