./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 13967880 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.extract-columns-1396788-m [2024-02-02 16:07:00,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 16:07:00,199 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 16:07:00,202 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 16:07:00,203 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 16:07:00,228 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 16:07:00,228 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 16:07:00,228 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 16:07:00,229 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 16:07:00,232 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 16:07:00,232 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 16:07:00,232 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 16:07:00,233 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 16:07:00,234 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 16:07:00,234 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 16:07:00,235 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 16:07:00,235 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 16:07:00,235 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 16:07:00,235 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 16:07:00,235 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 16:07:00,235 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 16:07:00,236 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 16:07:00,236 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 16:07:00,236 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 16:07:00,236 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 16:07:00,237 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 16:07:00,237 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 16:07:00,237 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 16:07:00,237 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 16:07:00,238 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 16:07:00,238 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 16:07:00,239 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 16:07:00,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 16:07:00,239 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 16:07:00,239 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 16:07:00,240 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 16:07:00,240 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 16:07:00,240 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 16:07:00,240 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 16:07:00,240 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 16:07:00,241 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 16:07:00,241 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 16:07:00,241 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 16:07:00,241 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 16:07:00,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 16:07:00,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 16:07:00,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 16:07:00,498 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 16:07:00,498 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 16:07:00,499 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml [2024-02-02 16:07:00,579 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 16:07:00,579 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 16:07:00,580 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2024-02-02 16:07:01,551 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 16:07:01,804 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 16:07:01,808 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2024-02-02 16:07:01,826 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c1aa0472/fdbc406a19624bb88950827ff7642c27/FLAGa97a4d1fa [2024-02-02 16:07:01,841 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c1aa0472/fdbc406a19624bb88950827ff7642c27 [2024-02-02 16:07:01,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 16:07:01,843 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 16:07:01,845 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 16:07:01,845 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 16:07:01,849 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 16:07:01,850 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 04:07:00" (1/2) ... [2024-02-02 16:07:01,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@688fac48 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:07:01, skipping insertion in model container [2024-02-02 16:07:01,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 04:07:00" (1/2) ... [2024-02-02 16:07:01,852 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@14f6b4ee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:07:01, skipping insertion in model container [2024-02-02 16:07:01,853 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 04:07:01" (2/2) ... [2024-02-02 16:07:01,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@688fac48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:01, skipping insertion in model container [2024-02-02 16:07:01,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 04:07:01" (2/2) ... [2024-02-02 16:07:01,853 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 16:07:01,909 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 16:07:01,911 INFO L101 nessWitnessExtractor]: Loop invariant at [L1005-L1005] (unsigned long )arg == 0UL [2024-02-02 16:07:01,911 INFO L101 nessWitnessExtractor]: Location invariant before [L994-L994] ((unsigned long )arg == 0UL) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) [2024-02-02 16:07:01,911 INFO L101 nessWitnessExtractor]: Location invariant before [L995-L995] ((unsigned long )arg == 0UL) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) [2024-02-02 16:07:01,911 INFO L101 nessWitnessExtractor]: Location invariant before [L997-L997] ((unsigned long )arg == 0UL) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) || i == 4) [2024-02-02 16:07:01,912 INFO L101 nessWitnessExtractor]: Location invariant before [L1007-L1007] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-02-02 16:07:01,912 INFO L101 nessWitnessExtractor]: Location invariant before [L998-L998] ((unsigned long )arg == 0UL) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) || i == 4) [2024-02-02 16:07:01,912 INFO L101 nessWitnessExtractor]: Location invariant before [L1020-L1020] flag == (_Bool)0 [2024-02-02 16:07:01,912 INFO L101 nessWitnessExtractor]: Location invariant before [L1000-L1000] (i == 800) && ((unsigned long )arg == 0UL) [2024-02-02 16:07:01,913 INFO L101 nessWitnessExtractor]: Location invariant before [L996-L996] ((unsigned long )arg == 0UL) && (((((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) || (5 <= i && i <= 799)) || (5 <= i && i <= 799)) || i == 4) [2024-02-02 16:07:01,913 INFO L101 nessWitnessExtractor]: Location invariant before [L1008-L1008] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-02-02 16:07:01,913 INFO L101 nessWitnessExtractor]: Location invariant before [L1011-L1011] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-02-02 16:07:01,913 INFO L101 nessWitnessExtractor]: Location invariant before [L993-L993] ((unsigned long )arg == 0UL) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) [2024-02-02 16:07:01,913 INFO L101 nessWitnessExtractor]: Location invariant before [L1021-L1021] flag == (_Bool)0 [2024-02-02 16:07:01,913 INFO L101 nessWitnessExtractor]: Location invariant before [L1013-L1013] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-02-02 16:07:01,913 INFO L101 nessWitnessExtractor]: Location invariant before [L1015-L1015] (i == 800) && ((unsigned long )arg == 0UL) [2024-02-02 16:07:01,914 INFO L101 nessWitnessExtractor]: Location invariant before [L1010-L1010] ((unsigned long )arg == 0UL) && ((((((((((((((((i == 5 || i == 4) || i == 4) || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 7) || i == 6) || i == 6) [2024-02-02 16:07:01,914 INFO L101 nessWitnessExtractor]: Loop invariant at [L991-L991] (unsigned long )arg == 0UL [2024-02-02 16:07:01,949 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-02 16:07:02,237 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2024-02-02 16:07:02,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 16:07:02,283 INFO L204 MainTranslator]: Completed pre-run [2024-02-02 16:07:02,333 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 16:07:02,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 16:07:02,461 INFO L208 MainTranslator]: Completed translation [2024-02-02 16:07:02,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02 WrapperNode [2024-02-02 16:07:02,461 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 16:07:02,463 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 16:07:02,463 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 16:07:02,463 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 16:07:02,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (1/1) ... [2024-02-02 16:07:02,495 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (1/1) ... [2024-02-02 16:07:02,526 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 173 [2024-02-02 16:07:02,529 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 16:07:02,529 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 16:07:02,529 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 16:07:02,529 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 16:07:02,538 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (1/1) ... [2024-02-02 16:07:02,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (1/1) ... [2024-02-02 16:07:02,547 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (1/1) ... [2024-02-02 16:07:02,572 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 5, 2, 3, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0]. The 4 writes are split as follows [0, 0, 1, 2, 1]. [2024-02-02 16:07:02,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (1/1) ... [2024-02-02 16:07:02,573 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (1/1) ... [2024-02-02 16:07:02,586 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (1/1) ... [2024-02-02 16:07:02,589 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (1/1) ... [2024-02-02 16:07:02,600 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (1/1) ... [2024-02-02 16:07:02,604 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (1/1) ... [2024-02-02 16:07:02,607 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 16:07:02,610 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 16:07:02,611 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 16:07:02,611 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 16:07:02,612 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (1/1) ... [2024-02-02 16:07:02,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 16:07:02,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:07:02,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-02 16:07:02,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-02 16:07:02,672 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-02 16:07:02,672 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-02 16:07:02,673 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-02 16:07:02,673 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-02 16:07:02,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 16:07:02,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 16:07:02,673 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-02 16:07:02,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-02 16:07:02,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-02 16:07:02,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-02 16:07:02,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-02 16:07:02,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-02 16:07:02,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 16:07:02,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 16:07:02,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 16:07:02,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-02 16:07:02,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-02 16:07:02,676 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-02 16:07:02,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 16:07:02,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 16:07:02,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 16:07:02,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 16:07:02,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-02 16:07:02,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-02 16:07:02,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 16:07:02,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 16:07:02,678 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-02 16:07:02,797 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 16:07:02,799 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 16:07:03,091 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 16:07:03,092 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 16:07:03,245 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 16:07:03,245 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-02 16:07:03,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 04:07:03 BoogieIcfgContainer [2024-02-02 16:07:03,250 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 16:07:03,252 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 16:07:03,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 16:07:03,255 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 16:07:03,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 04:07:00" (1/4) ... [2024-02-02 16:07:03,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a6953f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 04:07:03, skipping insertion in model container [2024-02-02 16:07:03,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 04:07:01" (2/4) ... [2024-02-02 16:07:03,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a6953f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 04:07:03, skipping insertion in model container [2024-02-02 16:07:03,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:07:02" (3/4) ... [2024-02-02 16:07:03,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a6953f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 04:07:03, skipping insertion in model container [2024-02-02 16:07:03,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 04:07:03" (4/4) ... [2024-02-02 16:07:03,258 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-02-02 16:07:03,272 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 16:07:03,272 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-02-02 16:07:03,272 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 16:07:03,324 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-02 16:07:03,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 69 transitions, 152 flow [2024-02-02 16:07:03,369 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2024-02-02 16:07:03,369 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 16:07:03,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 191 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2024-02-02 16:07:03,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 69 transitions, 152 flow [2024-02-02 16:07:03,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 139 flow [2024-02-02 16:07:03,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 16:07:03,386 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;@62197d72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 16:07:03,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-02-02 16:07:03,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 16:07:03,388 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 16:07:03,388 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 16:07:03,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:03,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 16:07:03,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:03,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:03,393 INFO L85 PathProgramCache]: Analyzing trace with hash 14238, now seen corresponding path program 1 times [2024-02-02 16:07:03,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:03,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842509403] [2024-02-02 16:07:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:03,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:03,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:03,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842509403] [2024-02-02 16:07:03,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842509403] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:07:03,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:07:03,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 16:07:03,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849428818] [2024-02-02 16:07:03,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:07:03,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 16:07:03,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 16:07:03,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 16:07:03,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-02 16:07:03,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:03,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:03,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-02 16:07:03,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:03,849 INFO L124 PetriNetUnfolderBase]: 411/1077 cut-off events. [2024-02-02 16:07:03,850 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-02-02 16:07:03,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 1077 events. 411/1077 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6923 event pairs, 337 based on Foata normal form. 48/919 useless extension candidates. Maximal degree in co-relation 1685. Up to 686 conditions per place. [2024-02-02 16:07:03,859 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 30 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2024-02-02 16:07:03,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 193 flow [2024-02-02 16:07:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 16:07:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 16:07:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-02-02 16:07:03,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6328502415458938 [2024-02-02 16:07:03,870 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 139 flow. Second operand 3 states and 131 transitions. [2024-02-02 16:07:03,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 193 flow [2024-02-02 16:07:03,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-02 16:07:03,875 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 128 flow [2024-02-02 16:07:03,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-02-02 16:07:03,879 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2024-02-02 16:07:03,879 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 128 flow [2024-02-02 16:07:03,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:03,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:03,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-02 16:07:03,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 16:07:03,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:03,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:03,881 INFO L85 PathProgramCache]: Analyzing trace with hash 277773959, now seen corresponding path program 1 times [2024-02-02 16:07:03,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:03,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909238816] [2024-02-02 16:07:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:03,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:03,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:03,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909238816] [2024-02-02 16:07:03,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909238816] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:07:03,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:07:03,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:07:03,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965295424] [2024-02-02 16:07:03,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:07:03,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:07:03,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:03,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:07:03,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:07:04,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-02-02 16:07:04,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:04,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:04,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-02-02 16:07:04,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:04,218 INFO L124 PetriNetUnfolderBase]: 428/1052 cut-off events. [2024-02-02 16:07:04,218 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-02 16:07:04,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794 conditions, 1052 events. 428/1052 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6687 event pairs, 30 based on Foata normal form. 0/896 useless extension candidates. Maximal degree in co-relation 1788. Up to 678 conditions per place. [2024-02-02 16:07:04,225 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 42 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-02-02 16:07:04,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 242 flow [2024-02-02 16:07:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:07:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:07:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-02-02 16:07:04,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-02-02 16:07:04,228 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 128 flow. Second operand 4 states and 177 transitions. [2024-02-02 16:07:04,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 242 flow [2024-02-02 16:07:04,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 73 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:07:04,230 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 129 flow [2024-02-02 16:07:04,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-02-02 16:07:04,231 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2024-02-02 16:07:04,231 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 129 flow [2024-02-02 16:07:04,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:04,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:04,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:04,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 16:07:04,232 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:04,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:04,232 INFO L85 PathProgramCache]: Analyzing trace with hash 652839743, now seen corresponding path program 1 times [2024-02-02 16:07:04,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:04,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655326424] [2024-02-02 16:07:04,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:04,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:04,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:04,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655326424] [2024-02-02 16:07:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655326424] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:07:04,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:07:04,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:07:04,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146921650] [2024-02-02 16:07:04,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:07:04,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:07:04,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:04,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:07:04,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:07:04,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-02-02 16:07:04,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:04,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:04,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-02-02 16:07:04,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:04,585 INFO L124 PetriNetUnfolderBase]: 393/1070 cut-off events. [2024-02-02 16:07:04,585 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-02-02 16:07:04,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1774 conditions, 1070 events. 393/1070 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7025 event pairs, 11 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 1768. Up to 564 conditions per place. [2024-02-02 16:07:04,592 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 56 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-02-02 16:07:04,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 302 flow [2024-02-02 16:07:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:07:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:07:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-02-02 16:07:04,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6920289855072463 [2024-02-02 16:07:04,597 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 129 flow. Second operand 4 states and 191 transitions. [2024-02-02 16:07:04,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 302 flow [2024-02-02 16:07:04,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:07:04,600 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 128 flow [2024-02-02 16:07:04,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-02-02 16:07:04,601 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2024-02-02 16:07:04,601 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 128 flow [2024-02-02 16:07:04,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:04,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:04,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:04,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 16:07:04,602 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:04,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:04,602 INFO L85 PathProgramCache]: Analyzing trace with hash 652817834, now seen corresponding path program 1 times [2024-02-02 16:07:04,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:04,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728385450] [2024-02-02 16:07:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:04,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:04,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:04,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728385450] [2024-02-02 16:07:04,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728385450] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:07:04,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:07:04,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 16:07:04,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792635891] [2024-02-02 16:07:04,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:07:04,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 16:07:04,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:04,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 16:07:04,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 16:07:04,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-02-02 16:07:04,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:04,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:04,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-02-02 16:07:04,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:04,863 INFO L124 PetriNetUnfolderBase]: 882/1932 cut-off events. [2024-02-02 16:07:04,863 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-02-02 16:07:04,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3552 conditions, 1932 events. 882/1932 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 12138 event pairs, 526 based on Foata normal form. 88/1721 useless extension candidates. Maximal degree in co-relation 3546. Up to 1018 conditions per place. [2024-02-02 16:07:04,871 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 56 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-02-02 16:07:04,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 292 flow [2024-02-02 16:07:04,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 16:07:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 16:07:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2024-02-02 16:07:04,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7053140096618358 [2024-02-02 16:07:04,874 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 128 flow. Second operand 3 states and 146 transitions. [2024-02-02 16:07:04,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 292 flow [2024-02-02 16:07:04,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:07:04,876 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 149 flow [2024-02-02 16:07:04,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-02-02 16:07:04,878 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2024-02-02 16:07:04,878 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 149 flow [2024-02-02 16:07:04,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:04,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:04,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:04,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 16:07:04,879 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:04,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:04,879 INFO L85 PathProgramCache]: Analyzing trace with hash 313784258, now seen corresponding path program 1 times [2024-02-02 16:07:04,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:04,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648287628] [2024-02-02 16:07:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:04,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:04,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:04,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648287628] [2024-02-02 16:07:04,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648287628] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:07:04,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:07:04,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 16:07:04,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252577055] [2024-02-02 16:07:04,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:07:04,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 16:07:04,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:04,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 16:07:04,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 16:07:04,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2024-02-02 16:07:04,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:04,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:04,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2024-02-02 16:07:04,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:05,208 INFO L124 PetriNetUnfolderBase]: 1382/3218 cut-off events. [2024-02-02 16:07:05,208 INFO L125 PetriNetUnfolderBase]: For 184/196 co-relation queries the response was YES. [2024-02-02 16:07:05,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5941 conditions, 3218 events. 1382/3218 cut-off events. For 184/196 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 23238 event pairs, 882 based on Foata normal form. 210/3137 useless extension candidates. Maximal degree in co-relation 5934. Up to 1694 conditions per place. [2024-02-02 16:07:05,221 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 57 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-02-02 16:07:05,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 323 flow [2024-02-02 16:07:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 16:07:05,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 16:07:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-02-02 16:07:05,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101449275362319 [2024-02-02 16:07:05,223 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 149 flow. Second operand 3 states and 147 transitions. [2024-02-02 16:07:05,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 323 flow [2024-02-02 16:07:05,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:07:05,225 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 169 flow [2024-02-02 16:07:05,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2024-02-02 16:07:05,226 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2024-02-02 16:07:05,226 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 169 flow [2024-02-02 16:07:05,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:05,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:05,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:05,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 16:07:05,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:05,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:05,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1509423826, now seen corresponding path program 1 times [2024-02-02 16:07:05,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:05,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406141238] [2024-02-02 16:07:05,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:05,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:05,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:05,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406141238] [2024-02-02 16:07:05,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406141238] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:07:05,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:07:05,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:07:05,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257992121] [2024-02-02 16:07:05,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:07:05,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:07:05,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:05,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:07:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:07:05,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-02-02 16:07:05,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:05,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:05,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-02-02 16:07:05,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:05,569 INFO L124 PetriNetUnfolderBase]: 1013/2417 cut-off events. [2024-02-02 16:07:05,570 INFO L125 PetriNetUnfolderBase]: For 216/242 co-relation queries the response was YES. [2024-02-02 16:07:05,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4808 conditions, 2417 events. 1013/2417 cut-off events. For 216/242 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 16531 event pairs, 159 based on Foata normal form. 22/2335 useless extension candidates. Maximal degree in co-relation 4800. Up to 1291 conditions per place. [2024-02-02 16:07:05,583 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 62 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2024-02-02 16:07:05,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 387 flow [2024-02-02 16:07:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:07:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:07:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-02-02 16:07:05,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-02-02 16:07:05,586 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 169 flow. Second operand 4 states and 195 transitions. [2024-02-02 16:07:05,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 387 flow [2024-02-02 16:07:05,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 379 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-02-02 16:07:05,592 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 187 flow [2024-02-02 16:07:05,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-02-02 16:07:05,596 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2024-02-02 16:07:05,597 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 187 flow [2024-02-02 16:07:05,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:05,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:05,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:05,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-02 16:07:05,601 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:05,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:05,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2028783150, now seen corresponding path program 1 times [2024-02-02 16:07:05,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:05,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105353158] [2024-02-02 16:07:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:05,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:05,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:05,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105353158] [2024-02-02 16:07:05,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105353158] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 16:07:05,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763790374] [2024-02-02 16:07:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:05,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:07:05,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:07:05,756 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 16:07:05,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-02 16:07:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:05,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-02 16:07:05,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 16:07:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:05,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 16:07:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:06,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763790374] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 16:07:06,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 16:07:06,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-02-02 16:07:06,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170194722] [2024-02-02 16:07:06,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 16:07:06,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-02 16:07:06,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:06,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-02 16:07:06,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-02 16:07:06,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 69 [2024-02-02 16:07:06,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 187 flow. Second operand has 8 states, 8 states have (on average 26.75) internal successors, (214), 8 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:06,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:06,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 69 [2024-02-02 16:07:06,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:07,164 INFO L124 PetriNetUnfolderBase]: 2598/4972 cut-off events. [2024-02-02 16:07:07,164 INFO L125 PetriNetUnfolderBase]: For 1184/1268 co-relation queries the response was YES. [2024-02-02 16:07:07,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10753 conditions, 4972 events. 2598/4972 cut-off events. For 1184/1268 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 29208 event pairs, 111 based on Foata normal form. 648/5405 useless extension candidates. Maximal degree in co-relation 10742. Up to 970 conditions per place. [2024-02-02 16:07:07,192 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 157 selfloop transitions, 6 changer transitions 0/181 dead transitions. [2024-02-02 16:07:07,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 181 transitions, 858 flow [2024-02-02 16:07:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 16:07:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 16:07:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 324 transitions. [2024-02-02 16:07:07,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2024-02-02 16:07:07,194 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 187 flow. Second operand 7 states and 324 transitions. [2024-02-02 16:07:07,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 181 transitions, 858 flow [2024-02-02 16:07:07,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 181 transitions, 851 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:07:07,199 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 204 flow [2024-02-02 16:07:07,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=204, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2024-02-02 16:07:07,201 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2024-02-02 16:07:07,201 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 204 flow [2024-02-02 16:07:07,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.75) internal successors, (214), 8 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:07,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:07,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:07,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-02 16:07:07,414 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 [2024-02-02 16:07:07,414 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:07,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:07,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1031377073, now seen corresponding path program 1 times [2024-02-02 16:07:07,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:07,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624689708] [2024-02-02 16:07:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:07,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:07,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:07,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624689708] [2024-02-02 16:07:07,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624689708] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 16:07:07,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841127477] [2024-02-02 16:07:07,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:07,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:07:07,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:07:07,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 16:07:07,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-02 16:07:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:07,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-02 16:07:07,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 16:07:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:07,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 16:07:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:08,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841127477] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 16:07:08,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 16:07:08,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-02-02 16:07:08,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686937891] [2024-02-02 16:07:08,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 16:07:08,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-02 16:07:08,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:08,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-02 16:07:08,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-02 16:07:08,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 69 [2024-02-02 16:07:08,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 27.25) internal successors, (218), 8 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) [2024-02-02 16:07:08,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:08,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 69 [2024-02-02 16:07:08,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:08,888 INFO L124 PetriNetUnfolderBase]: 4586/8199 cut-off events. [2024-02-02 16:07:08,888 INFO L125 PetriNetUnfolderBase]: For 4050/4050 co-relation queries the response was YES. [2024-02-02 16:07:08,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18822 conditions, 8199 events. 4586/8199 cut-off events. For 4050/4050 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 52450 event pairs, 163 based on Foata normal form. 1080/8579 useless extension candidates. Maximal degree in co-relation 18807. Up to 1928 conditions per place. [2024-02-02 16:07:08,925 INFO L140 encePairwiseOnDemand]: 59/69 looper letters, 144 selfloop transitions, 6 changer transitions 0/164 dead transitions. [2024-02-02 16:07:08,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 164 transitions, 906 flow [2024-02-02 16:07:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 16:07:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 16:07:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 314 transitions. [2024-02-02 16:07:08,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.650103519668737 [2024-02-02 16:07:08,927 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 204 flow. Second operand 7 states and 314 transitions. [2024-02-02 16:07:08,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 164 transitions, 906 flow [2024-02-02 16:07:08,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 164 transitions, 852 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-02-02 16:07:08,933 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 212 flow [2024-02-02 16:07:08,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2024-02-02 16:07:08,933 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2024-02-02 16:07:08,934 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 212 flow [2024-02-02 16:07:08,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.25) internal successors, (218), 8 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) [2024-02-02 16:07:08,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:08,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:08,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-02 16:07:09,146 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 [2024-02-02 16:07:09,146 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:09,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:09,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1993543258, now seen corresponding path program 1 times [2024-02-02 16:07:09,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:09,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727512505] [2024-02-02 16:07:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:09,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:09,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:09,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727512505] [2024-02-02 16:07:09,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727512505] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:07:09,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:07:09,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:07:09,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266695895] [2024-02-02 16:07:09,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:07:09,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 16:07:09,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:09,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 16:07:09,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 16:07:09,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 69 [2024-02-02 16:07:09,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:09,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:09,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 69 [2024-02-02 16:07:09,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:09,588 INFO L124 PetriNetUnfolderBase]: 1677/4376 cut-off events. [2024-02-02 16:07:09,589 INFO L125 PetriNetUnfolderBase]: For 2959/2959 co-relation queries the response was YES. [2024-02-02 16:07:09,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9975 conditions, 4376 events. 1677/4376 cut-off events. For 2959/2959 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 27842 event pairs, 504 based on Foata normal form. 276/4460 useless extension candidates. Maximal degree in co-relation 9956. Up to 2067 conditions per place. [2024-02-02 16:07:09,613 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 56 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-02-02 16:07:09,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 79 transitions, 440 flow [2024-02-02 16:07:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 16:07:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 16:07:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2024-02-02 16:07:09,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7246376811594203 [2024-02-02 16:07:09,614 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 212 flow. Second operand 3 states and 150 transitions. [2024-02-02 16:07:09,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 79 transitions, 440 flow [2024-02-02 16:07:09,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 422 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-02-02 16:07:09,618 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 211 flow [2024-02-02 16:07:09,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2024-02-02 16:07:09,620 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2024-02-02 16:07:09,620 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 211 flow [2024-02-02 16:07:09,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:09,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:09,620 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] [2024-02-02 16:07:09,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-02 16:07:09,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:09,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:09,621 INFO L85 PathProgramCache]: Analyzing trace with hash -714621065, now seen corresponding path program 1 times [2024-02-02 16:07:09,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:09,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214724820] [2024-02-02 16:07:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:09,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:09,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:09,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214724820] [2024-02-02 16:07:09,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214724820] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 16:07:09,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547805404] [2024-02-02 16:07:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:09,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:07:09,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:07:09,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 16:07:09,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-02 16:07:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:09,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-02 16:07:09,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 16:07:09,887 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 [2024-02-02 16:07:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:09,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 16:07:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:10,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547805404] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 16:07:10,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 16:07:10,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-02-02 16:07:10,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564326347] [2024-02-02 16:07:10,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 16:07:10,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 16:07:10,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:10,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 16:07:10,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-02-02 16:07:10,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-02 16:07:10,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 211 flow. Second operand has 9 states, 9 states have (on average 37.77777777777778) internal successors, (340), 9 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:10,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:10,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-02 16:07:10,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:11,317 INFO L124 PetriNetUnfolderBase]: 5145/12095 cut-off events. [2024-02-02 16:07:11,317 INFO L125 PetriNetUnfolderBase]: For 9221/9221 co-relation queries the response was YES. [2024-02-02 16:07:11,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30328 conditions, 12095 events. 5145/12095 cut-off events. For 9221/9221 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 96218 event pairs, 999 based on Foata normal form. 114/11925 useless extension candidates. Maximal degree in co-relation 30309. Up to 1977 conditions per place. [2024-02-02 16:07:11,464 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 213 selfloop transitions, 19 changer transitions 0/249 dead transitions. [2024-02-02 16:07:11,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 249 transitions, 1506 flow [2024-02-02 16:07:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-02 16:07:11,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-02 16:07:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 574 transitions. [2024-02-02 16:07:11,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6932367149758454 [2024-02-02 16:07:11,466 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 211 flow. Second operand 12 states and 574 transitions. [2024-02-02 16:07:11,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 249 transitions, 1506 flow [2024-02-02 16:07:11,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 249 transitions, 1484 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:07:11,488 INFO L231 Difference]: Finished difference. Result has 94 places, 76 transitions, 341 flow [2024-02-02 16:07:11,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=341, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2024-02-02 16:07:11,490 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 27 predicate places. [2024-02-02 16:07:11,490 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 341 flow [2024-02-02 16:07:11,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 37.77777777777778) internal successors, (340), 9 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:11,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:11,490 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] [2024-02-02 16:07:11,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-02 16:07:11,702 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 [2024-02-02 16:07:11,703 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:11,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1754071611, now seen corresponding path program 1 times [2024-02-02 16:07:11,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:11,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843209064] [2024-02-02 16:07:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:11,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:12,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:12,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843209064] [2024-02-02 16:07:12,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843209064] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:07:12,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:07:12,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-02 16:07:12,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097967280] [2024-02-02 16:07:12,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:07:12,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-02 16:07:12,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:12,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-02 16:07:12,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-02 16:07:12,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-02 16:07:12,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:12,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:12,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-02 16:07:12,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:13,558 INFO L124 PetriNetUnfolderBase]: 5373/12579 cut-off events. [2024-02-02 16:07:13,558 INFO L125 PetriNetUnfolderBase]: For 13098/13098 co-relation queries the response was YES. [2024-02-02 16:07:13,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33192 conditions, 12579 events. 5373/12579 cut-off events. For 13098/13098 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 101277 event pairs, 1296 based on Foata normal form. 16/12361 useless extension candidates. Maximal degree in co-relation 33165. Up to 6272 conditions per place. [2024-02-02 16:07:13,615 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 117 selfloop transitions, 13 changer transitions 0/147 dead transitions. [2024-02-02 16:07:13,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 147 transitions, 914 flow [2024-02-02 16:07:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 16:07:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 16:07:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 319 transitions. [2024-02-02 16:07:13,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.660455486542443 [2024-02-02 16:07:13,617 INFO L175 Difference]: Start difference. First operand has 94 places, 76 transitions, 341 flow. Second operand 7 states and 319 transitions. [2024-02-02 16:07:13,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 147 transitions, 914 flow [2024-02-02 16:07:13,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 147 transitions, 900 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-02-02 16:07:13,642 INFO L231 Difference]: Finished difference. Result has 104 places, 82 transitions, 419 flow [2024-02-02 16:07:13,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=419, PETRI_PLACES=104, PETRI_TRANSITIONS=82} [2024-02-02 16:07:13,642 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 37 predicate places. [2024-02-02 16:07:13,643 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 82 transitions, 419 flow [2024-02-02 16:07:13,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:13,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:13,643 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-02 16:07:13,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-02 16:07:13,643 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:13,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:13,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1020512474, now seen corresponding path program 1 times [2024-02-02 16:07:13,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:13,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433964642] [2024-02-02 16:07:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:13,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:14,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:14,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433964642] [2024-02-02 16:07:14,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433964642] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 16:07:14,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225179138] [2024-02-02 16:07:14,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:14,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:07:14,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:07:14,038 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 16:07:14,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-02 16:07:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:14,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-02 16:07:14,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 16:07:14,174 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 [2024-02-02 16:07:14,302 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 [2024-02-02 16:07:14,406 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 [2024-02-02 16:07:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:14,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 16:07:14,859 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 [2024-02-02 16:07:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:14,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225179138] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 16:07:14,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 16:07:14,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-02-02 16:07:14,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063351244] [2024-02-02 16:07:14,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 16:07:14,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-02 16:07:14,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:14,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-02 16:07:14,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-02-02 16:07:14,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-02 16:07:14,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 82 transitions, 419 flow. Second operand has 20 states, 20 states have (on average 36.05) internal successors, (721), 20 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:14,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:14,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-02 16:07:14,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:20,114 INFO L124 PetriNetUnfolderBase]: 13269/30451 cut-off events. [2024-02-02 16:07:20,114 INFO L125 PetriNetUnfolderBase]: For 44812/44812 co-relation queries the response was YES. [2024-02-02 16:07:20,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84992 conditions, 30451 events. 13269/30451 cut-off events. For 44812/44812 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 279917 event pairs, 1568 based on Foata normal form. 168/30335 useless extension candidates. Maximal degree in co-relation 84959. Up to 4668 conditions per place. [2024-02-02 16:07:20,388 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 646 selfloop transitions, 110 changer transitions 0/773 dead transitions. [2024-02-02 16:07:20,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 773 transitions, 5400 flow [2024-02-02 16:07:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-02-02 16:07:20,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-02-02 16:07:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2174 transitions. [2024-02-02 16:07:20,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6301449275362319 [2024-02-02 16:07:20,393 INFO L175 Difference]: Start difference. First operand has 104 places, 82 transitions, 419 flow. Second operand 50 states and 2174 transitions. [2024-02-02 16:07:20,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 773 transitions, 5400 flow [2024-02-02 16:07:20,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 773 transitions, 5400 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-02 16:07:20,643 INFO L231 Difference]: Finished difference. Result has 157 places, 188 transitions, 1304 flow [2024-02-02 16:07:20,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=1304, PETRI_PLACES=157, PETRI_TRANSITIONS=188} [2024-02-02 16:07:20,643 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 90 predicate places. [2024-02-02 16:07:20,643 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 188 transitions, 1304 flow [2024-02-02 16:07:20,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 36.05) internal successors, (721), 20 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:20,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:20,644 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:20,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-02 16:07:20,855 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 [2024-02-02 16:07:20,856 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err7ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:20,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:20,856 INFO L85 PathProgramCache]: Analyzing trace with hash -49931293, now seen corresponding path program 1 times [2024-02-02 16:07:20,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:20,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688215411] [2024-02-02 16:07:20,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:20,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-02 16:07:20,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:20,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688215411] [2024-02-02 16:07:20,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688215411] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:07:20,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:07:20,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 16:07:20,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375347710] [2024-02-02 16:07:20,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:07:20,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-02 16:07:20,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:20,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-02 16:07:20,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-02-02 16:07:20,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-02-02 16:07:20,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 188 transitions, 1304 flow. Second operand has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:20,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:20,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-02-02 16:07:20,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:25,999 INFO L124 PetriNetUnfolderBase]: 20349/41191 cut-off events. [2024-02-02 16:07:25,999 INFO L125 PetriNetUnfolderBase]: For 51053/51173 co-relation queries the response was YES. [2024-02-02 16:07:26,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120952 conditions, 41191 events. 20349/41191 cut-off events. For 51053/51173 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 362238 event pairs, 6291 based on Foata normal form. 0/41056 useless extension candidates. Maximal degree in co-relation 120913. Up to 23549 conditions per place. [2024-02-02 16:07:26,360 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 364 selfloop transitions, 8 changer transitions 3/420 dead transitions. [2024-02-02 16:07:26,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 420 transitions, 3599 flow [2024-02-02 16:07:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 16:07:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 16:07:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 218 transitions. [2024-02-02 16:07:26,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318840579710145 [2024-02-02 16:07:26,361 INFO L175 Difference]: Start difference. First operand has 157 places, 188 transitions, 1304 flow. Second operand 5 states and 218 transitions. [2024-02-02 16:07:26,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 420 transitions, 3599 flow [2024-02-02 16:07:26,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 420 transitions, 3176 flow, removed 200 selfloop flow, removed 4 redundant places. [2024-02-02 16:07:26,606 INFO L231 Difference]: Finished difference. Result has 157 places, 188 transitions, 1141 flow [2024-02-02 16:07:26,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1141, PETRI_PLACES=157, PETRI_TRANSITIONS=188} [2024-02-02 16:07:26,607 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 90 predicate places. [2024-02-02 16:07:26,607 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 188 transitions, 1141 flow [2024-02-02 16:07:26,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:26,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:26,608 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2024-02-02 16:07:26,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-02 16:07:26,608 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:26,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1089138768, now seen corresponding path program 1 times [2024-02-02 16:07:26,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:26,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264965836] [2024-02-02 16:07:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:26,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-02 16:07:26,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:26,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264965836] [2024-02-02 16:07:26,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264965836] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 16:07:26,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904600185] [2024-02-02 16:07:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:26,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:07:26,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:07:26,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 16:07:26,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-02 16:07:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:26,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-02 16:07:26,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 16:07:26,982 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 [2024-02-02 16:07:27,034 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 [2024-02-02 16:07:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:27,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 16:07:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-02 16:07:27,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904600185] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 16:07:27,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 16:07:27,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 13 [2024-02-02 16:07:27,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648889794] [2024-02-02 16:07:27,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 16:07:27,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-02 16:07:27,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:27,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-02 16:07:27,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-02-02 16:07:27,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-02 16:07:27,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 188 transitions, 1141 flow. Second operand has 13 states, 13 states have (on average 37.30769230769231) internal successors, (485), 13 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:27,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:27,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-02 16:07:27,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:34,464 INFO L124 PetriNetUnfolderBase]: 22091/50259 cut-off events. [2024-02-02 16:07:34,464 INFO L125 PetriNetUnfolderBase]: For 117392/117392 co-relation queries the response was YES. [2024-02-02 16:07:34,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153827 conditions, 50259 events. 22091/50259 cut-off events. For 117392/117392 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 476780 event pairs, 3575 based on Foata normal form. 686/50669 useless extension candidates. Maximal degree in co-relation 153789. Up to 7746 conditions per place. [2024-02-02 16:07:34,903 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 570 selfloop transitions, 173 changer transitions 7/767 dead transitions. [2024-02-02 16:07:34,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 767 transitions, 5948 flow [2024-02-02 16:07:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-02 16:07:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-02 16:07:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1256 transitions. [2024-02-02 16:07:34,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6741814278046162 [2024-02-02 16:07:34,905 INFO L175 Difference]: Start difference. First operand has 157 places, 188 transitions, 1141 flow. Second operand 27 states and 1256 transitions. [2024-02-02 16:07:34,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 767 transitions, 5948 flow [2024-02-02 16:07:35,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 767 transitions, 5698 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-02-02 16:07:35,420 INFO L231 Difference]: Finished difference. Result has 196 places, 301 transitions, 2522 flow [2024-02-02 16:07:35,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2522, PETRI_PLACES=196, PETRI_TRANSITIONS=301} [2024-02-02 16:07:35,421 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 129 predicate places. [2024-02-02 16:07:35,421 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 301 transitions, 2522 flow [2024-02-02 16:07:35,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.30769230769231) internal successors, (485), 13 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:35,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:35,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:35,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-02 16:07:35,624 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 [2024-02-02 16:07:35,624 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:35,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:35,624 INFO L85 PathProgramCache]: Analyzing trace with hash 52765613, now seen corresponding path program 1 times [2024-02-02 16:07:35,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:35,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872222723] [2024-02-02 16:07:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:35,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:36,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:36,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872222723] [2024-02-02 16:07:36,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872222723] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 16:07:36,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322819393] [2024-02-02 16:07:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:36,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:07:36,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:07:36,860 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 16:07:36,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-02 16:07:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:36,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-02 16:07:36,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 16:07:37,028 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 [2024-02-02 16:07:37,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2024-02-02 16:07:37,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-02-02 16:07:37,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 29 [2024-02-02 16:07:37,775 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-02 16:07:37,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 57 [2024-02-02 16:07:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:37,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 16:07:38,407 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 112 treesize of output 106 [2024-02-02 16:07:38,439 INFO L349 Elim1Store]: treesize reduction 43, result has 48.2 percent of original size [2024-02-02 16:07:38,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 106 treesize of output 138 [2024-02-02 16:07:38,533 INFO L349 Elim1Store]: treesize reduction 18, result has 55.0 percent of original size [2024-02-02 16:07:38,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 108 [2024-02-02 16:07:38,662 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-02-02 16:07:38,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 104 treesize of output 96 [2024-02-02 16:07:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:38,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322819393] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 16:07:38,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 16:07:38,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-02-02 16:07:38,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687686988] [2024-02-02 16:07:38,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 16:07:38,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-02 16:07:38,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:38,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-02 16:07:38,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2024-02-02 16:07:38,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-02 16:07:38,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 301 transitions, 2522 flow. Second operand has 25 states, 25 states have (on average 35.96) internal successors, (899), 25 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:38,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:38,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-02 16:07:38,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:57,189 INFO L124 PetriNetUnfolderBase]: 37979/85547 cut-off events. [2024-02-02 16:07:57,190 INFO L125 PetriNetUnfolderBase]: For 211600/211600 co-relation queries the response was YES. [2024-02-02 16:07:58,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275764 conditions, 85547 events. 37979/85547 cut-off events. For 211600/211600 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 813170 event pairs, 5902 based on Foata normal form. 400/85421 useless extension candidates. Maximal degree in co-relation 275710. Up to 13038 conditions per place. [2024-02-02 16:07:58,459 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 880 selfloop transitions, 491 changer transitions 47/1435 dead transitions. [2024-02-02 16:07:58,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1435 transitions, 12739 flow [2024-02-02 16:07:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-02-02 16:07:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2024-02-02 16:07:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 2675 transitions. [2024-02-02 16:07:58,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6252921926133708 [2024-02-02 16:07:58,463 INFO L175 Difference]: Start difference. First operand has 196 places, 301 transitions, 2522 flow. Second operand 62 states and 2675 transitions. [2024-02-02 16:07:58,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1435 transitions, 12739 flow [2024-02-02 16:07:59,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 1435 transitions, 12653 flow, removed 43 selfloop flow, removed 0 redundant places. [2024-02-02 16:07:59,935 INFO L231 Difference]: Finished difference. Result has 288 places, 677 transitions, 7476 flow [2024-02-02 16:07:59,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=7476, PETRI_PLACES=288, PETRI_TRANSITIONS=677} [2024-02-02 16:07:59,936 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 221 predicate places. [2024-02-02 16:07:59,936 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 677 transitions, 7476 flow [2024-02-02 16:07:59,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 35.96) internal successors, (899), 25 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:07:59,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:59,937 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:59,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-02 16:08:00,142 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 [2024-02-02 16:08:00,142 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err8ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:08:00,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:08:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash -281625717, now seen corresponding path program 1 times [2024-02-02 16:08:00,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:08:00,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387595335] [2024-02-02 16:08:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:08:00,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:08:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:08:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-02-02 16:08:00,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:08:00,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387595335] [2024-02-02 16:08:00,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387595335] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:08:00,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:08:00,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 16:08:00,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797096029] [2024-02-02 16:08:00,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:08:00,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-02 16:08:00,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:08:00,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-02 16:08:00,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-02-02 16:08:00,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2024-02-02 16:08:00,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 677 transitions, 7476 flow. Second operand has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 16:08:00,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:08:00,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2024-02-02 16:08:00,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand