./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 3d25acf6 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-3d25acf-m [2024-01-30 14:15:16,459 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-30 14:15:16,520 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-30 14:15:16,528 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-30 14:15:16,528 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-30 14:15:16,553 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-30 14:15:16,553 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-30 14:15:16,553 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-30 14:15:16,554 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-30 14:15:16,554 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-30 14:15:16,554 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-30 14:15:16,554 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-30 14:15:16,555 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-30 14:15:16,555 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-30 14:15:16,555 INFO L153 SettingsManager]: * Use SBE=true [2024-01-30 14:15:16,556 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-30 14:15:16,556 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-30 14:15:16,556 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-30 14:15:16,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-30 14:15:16,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-30 14:15:16,557 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-30 14:15:16,560 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-30 14:15:16,560 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-30 14:15:16,561 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-30 14:15:16,564 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-30 14:15:16,564 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-30 14:15:16,564 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-30 14:15:16,565 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-30 14:15:16,565 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-30 14:15:16,566 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-30 14:15:16,566 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-30 14:15:16,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-30 14:15:16,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-30 14:15:16,567 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-30 14:15:16,567 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-30 14:15:16,567 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-30 14:15:16,568 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-30 14:15:16,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-30 14:15:16,568 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-30 14:15:16,568 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-30 14:15:16,568 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-30 14:15:16,569 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-30 14:15:16,569 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-30 14:15:16,569 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-30 14:15:16,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-30 14:15:16,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-30 14:15:16,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-30 14:15:16,840 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-30 14:15:16,840 INFO L274 PluginConnector]: CDTParser initialized [2024-01-30 14:15:16,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2024-01-30 14:15:17,942 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-30 14:15:18,309 INFO L384 CDTParser]: Found 1 translation units. [2024-01-30 14:15:18,310 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2024-01-30 14:15:18,340 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a172f3b20/7d64722b34ff4d2b9cba10c6c7807b4e/FLAG16bea111c [2024-01-30 14:15:18,365 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a172f3b20/7d64722b34ff4d2b9cba10c6c7807b4e [2024-01-30 14:15:18,367 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-30 14:15:18,368 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-30 14:15:18,371 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml [2024-01-30 14:15:18,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-30 14:15:18,563 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-30 14:15:18,566 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-30 14:15:18,566 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-30 14:15:18,570 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-30 14:15:18,571 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 02:15:18" (1/2) ... [2024-01-30 14:15:18,572 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@314c4737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:18, skipping insertion in model container [2024-01-30 14:15:18,573 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 02:15:18" (1/2) ... [2024-01-30 14:15:18,574 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@21b1e1b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:18, skipping insertion in model container [2024-01-30 14:15:18,574 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 30.01 02:15:18" (2/2) ... [2024-01-30 14:15:18,575 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@314c4737 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:18, skipping insertion in model container [2024-01-30 14:15:18,575 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 30.01 02:15:18" (2/2) ... [2024-01-30 14:15:18,576 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-30 14:15:18,644 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-30 14:15:18,645 INFO L98 nessWitnessExtractor]: Location invariant before [L995-L995] ((unsigned long )arg == 0UL) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) [2024-01-30 14:15:18,646 INFO L98 nessWitnessExtractor]: Location invariant before [L1007-L1007] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-30 14:15:18,646 INFO L98 nessWitnessExtractor]: Location invariant after [L996-L997] ((unsigned long )arg == 0UL) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) || i == 4) [2024-01-30 14:15:18,646 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L997] ((unsigned long )arg == 0UL) && (((((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) || (5 <= i && i <= 799)) || (5 <= i && i <= 799)) || i == 4) [2024-01-30 14:15:18,646 INFO L98 nessWitnessExtractor]: Location invariant before [L1020-L1020] flag == (_Bool)0 [2024-01-30 14:15:18,646 INFO L98 nessWitnessExtractor]: Location invariant before [L1000-L1000] (i == 800) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:18,646 INFO L98 nessWitnessExtractor]: Location invariant before [L1021-L1021] flag == (_Bool)0 [2024-01-30 14:15:18,647 INFO L98 nessWitnessExtractor]: Location invariant before [L1008-L1012] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-30 14:15:18,647 INFO L98 nessWitnessExtractor]: Location invariant before [L998-L998] ((unsigned long )arg == 0UL) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) || i == 4) [2024-01-30 14:15:18,647 INFO L98 nessWitnessExtractor]: Location invariant before [L1015-L1015] (i == 800) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:18,647 INFO L98 nessWitnessExtractor]: Location invariant before [L1013-L1013] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-30 14:15:18,647 INFO L98 nessWitnessExtractor]: Location invariant after [L1010-L1011] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-30 14:15:18,647 INFO L98 nessWitnessExtractor]: Location invariant before [L1010-L1011] ((unsigned long )arg == 0UL) && ((((((((((((((((i == 5 || i == 4) || i == 4) || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 7) || i == 6) || i == 6) [2024-01-30 14:15:18,648 INFO L98 nessWitnessExtractor]: Loop invariant at [L1005-L1014] (unsigned long )arg == 0UL [2024-01-30 14:15:18,648 INFO L98 nessWitnessExtractor]: Loop invariant at [L991-L999] (unsigned long )arg == 0UL [2024-01-30 14:15:18,648 INFO L98 nessWitnessExtractor]: Location invariant before [L994-L994] ((unsigned long )arg == 0UL) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) [2024-01-30 14:15:18,648 INFO L98 nessWitnessExtractor]: Location invariant before [L993-L993] ((unsigned long )arg == 0UL) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) [2024-01-30 14:15:18,699 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-30 14:15:19,080 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2024-01-30 14:15:19,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-30 14:15:19,130 INFO L202 MainTranslator]: Completed pre-run [2024-01-30 14:15:19,157 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 [2024-01-30 14:15:19,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-30 14:15:19,253 INFO L206 MainTranslator]: Completed translation [2024-01-30 14:15:19,254 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19 WrapperNode [2024-01-30 14:15:19,254 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-30 14:15:19,255 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-30 14:15:19,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-30 14:15:19,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-30 14:15:19,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (1/1) ... [2024-01-30 14:15:19,284 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (1/1) ... [2024-01-30 14:15:19,321 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 175 [2024-01-30 14:15:19,322 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-30 14:15:19,322 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-30 14:15:19,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-30 14:15:19,323 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-30 14:15:19,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (1/1) ... [2024-01-30 14:15:19,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (1/1) ... [2024-01-30 14:15:19,335 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (1/1) ... [2024-01-30 14:15:19,351 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 5, 3, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0]. The 4 writes are split as follows [0, 1, 0, 2, 1]. [2024-01-30 14:15:19,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (1/1) ... [2024-01-30 14:15:19,352 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (1/1) ... [2024-01-30 14:15:19,365 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (1/1) ... [2024-01-30 14:15:19,368 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (1/1) ... [2024-01-30 14:15:19,381 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (1/1) ... [2024-01-30 14:15:19,383 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (1/1) ... [2024-01-30 14:15:19,387 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-30 14:15:19,388 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-30 14:15:19,388 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-30 14:15:19,388 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-30 14:15:19,389 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (1/1) ... [2024-01-30 14:15:19,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-30 14:15:19,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:19,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-30 14:15:19,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-30 14:15:19,444 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-30 14:15:19,444 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-30 14:15:19,444 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-30 14:15:19,444 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-30 14:15:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-30 14:15:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-30 14:15:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-30 14:15:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-30 14:15:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-30 14:15:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-30 14:15:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-30 14:15:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-30 14:15:19,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-30 14:15:19,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-30 14:15:19,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-30 14:15:19,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-30 14:15:19,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-30 14:15:19,446 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-30 14:15:19,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-30 14:15:19,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-30 14:15:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-30 14:15:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-30 14:15:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-30 14:15:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-30 14:15:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-30 14:15:19,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-30 14:15:19,449 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-30 14:15:19,598 INFO L244 CfgBuilder]: Building ICFG [2024-01-30 14:15:19,600 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-30 14:15:19,910 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-30 14:15:19,910 INFO L293 CfgBuilder]: Performing block encoding [2024-01-30 14:15:20,028 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-30 14:15:20,029 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-30 14:15:20,029 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 02:15:20 BoogieIcfgContainer [2024-01-30 14:15:20,029 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-30 14:15:20,031 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-30 14:15:20,031 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-30 14:15:20,034 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-30 14:15:20,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 02:15:18" (1/4) ... [2024-01-30 14:15:20,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5bf5eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 02:15:20, skipping insertion in model container [2024-01-30 14:15:20,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 30.01 02:15:18" (2/4) ... [2024-01-30 14:15:20,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5bf5eb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 30.01 02:15:20, skipping insertion in model container [2024-01-30 14:15:20,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:19" (3/4) ... [2024-01-30 14:15:20,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5bf5eb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 30.01 02:15:20, skipping insertion in model container [2024-01-30 14:15:20,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 02:15:20" (4/4) ... [2024-01-30 14:15:20,038 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-01-30 14:15:20,051 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-30 14:15:20,051 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2024-01-30 14:15:20,052 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-30 14:15:20,121 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-30 14:15:20,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 160 flow [2024-01-30 14:15:20,190 INFO L124 PetriNetUnfolderBase]: 5/71 cut-off events. [2024-01-30 14:15:20,191 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-30 14:15:20,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 5/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 215 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2024-01-30 14:15:20,196 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 160 flow [2024-01-30 14:15:20,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 147 flow [2024-01-30 14:15:20,213 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-30 14:15:20,224 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;@db5c998, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-30 14:15:20,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2024-01-30 14:15:20,227 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-30 14:15:20,227 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-30 14:15:20,228 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-30 14:15:20,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:20,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-30 14:15:20,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:20,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:20,276 INFO L85 PathProgramCache]: Analyzing trace with hash 14462, now seen corresponding path program 1 times [2024-01-30 14:15:20,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:20,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660999949] [2024-01-30 14:15:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:20,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:20,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:20,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660999949] [2024-01-30 14:15:20,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660999949] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:20,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:20,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-30 14:15:20,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549364087] [2024-01-30 14:15:20,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:20,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-30 14:15:20,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-30 14:15:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-30 14:15:20,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:20,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:20,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:20,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:20,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:20,828 INFO L124 PetriNetUnfolderBase]: 473/1246 cut-off events. [2024-01-30 14:15:20,830 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-01-30 14:15:20,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 1246 events. 473/1246 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8355 event pairs, 357 based on Foata normal form. 48/991 useless extension candidates. Maximal degree in co-relation 1903. Up to 749 conditions per place. [2024-01-30 14:15:20,841 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 28 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2024-01-30 14:15:20,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 197 flow [2024-01-30 14:15:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-30 14:15:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-30 14:15:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-01-30 14:15:20,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6712328767123288 [2024-01-30 14:15:20,854 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 147 flow. Second operand 3 states and 147 transitions. [2024-01-30 14:15:20,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 197 flow [2024-01-30 14:15:20,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 65 transitions, 192 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-30 14:15:20,863 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 136 flow [2024-01-30 14:15:20,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-01-30 14:15:20,867 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2024-01-30 14:15:20,868 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 136 flow [2024-01-30 14:15:20,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:20,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:20,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-30 14:15:20,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-30 14:15:20,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:20,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:20,870 INFO L85 PathProgramCache]: Analyzing trace with hash 484833197, now seen corresponding path program 1 times [2024-01-30 14:15:20,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:20,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902473757] [2024-01-30 14:15:20,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:20,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:21,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:21,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902473757] [2024-01-30 14:15:21,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902473757] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:21,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:21,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:21,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366106982] [2024-01-30 14:15:21,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:21,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:21,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:21,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:21,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:21,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:21,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:21,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:21,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:21,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:21,265 INFO L124 PetriNetUnfolderBase]: 423/1045 cut-off events. [2024-01-30 14:15:21,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-30 14:15:21,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1760 conditions, 1045 events. 423/1045 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6797 event pairs, 9 based on Foata normal form. 44/951 useless extension candidates. Maximal degree in co-relation 1754. Up to 649 conditions per place. [2024-01-30 14:15:21,271 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 39 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-01-30 14:15:21,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 240 flow [2024-01-30 14:15:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-01-30 14:15:21,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678082191780822 [2024-01-30 14:15:21,277 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 136 flow. Second operand 4 states and 195 transitions. [2024-01-30 14:15:21,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 240 flow [2024-01-30 14:15:21,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-30 14:15:21,279 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 135 flow [2024-01-30 14:15:21,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2024-01-30 14:15:21,280 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2024-01-30 14:15:21,280 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 135 flow [2024-01-30 14:15:21,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:21,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:21,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:21,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-30 14:15:21,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:21,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2068250192, now seen corresponding path program 1 times [2024-01-30 14:15:21,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:21,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037403523] [2024-01-30 14:15:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:21,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:21,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:21,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037403523] [2024-01-30 14:15:21,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037403523] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:21,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:21,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:21,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042825681] [2024-01-30 14:15:21,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:21,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:21,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:21,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:21,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:21,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 73 [2024-01-30 14:15:21,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:21,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:21,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 73 [2024-01-30 14:15:21,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:21,600 INFO L124 PetriNetUnfolderBase]: 1170/2352 cut-off events. [2024-01-30 14:15:21,601 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-01-30 14:15:21,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4354 conditions, 2352 events. 1170/2352 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 14724 event pairs, 695 based on Foata normal form. 22/1966 useless extension candidates. Maximal degree in co-relation 4348. Up to 1224 conditions per place. [2024-01-30 14:15:21,610 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 72 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2024-01-30 14:15:21,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 359 flow [2024-01-30 14:15:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:21,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2024-01-30 14:15:21,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6506849315068494 [2024-01-30 14:15:21,611 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 135 flow. Second operand 4 states and 190 transitions. [2024-01-30 14:15:21,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 359 flow [2024-01-30 14:15:21,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:21,613 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 158 flow [2024-01-30 14:15:21,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-01-30 14:15:21,614 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2024-01-30 14:15:21,614 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 158 flow [2024-01-30 14:15:21,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:21,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:21,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:21,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-30 14:15:21,615 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:21,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2068276009, now seen corresponding path program 1 times [2024-01-30 14:15:21,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:21,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968743528] [2024-01-30 14:15:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:21,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:21,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968743528] [2024-01-30 14:15:21,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968743528] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:21,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:21,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:21,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083245923] [2024-01-30 14:15:21,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:21,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:21,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:21,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:21,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:21,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:21,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:21,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:21,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:21,893 INFO L124 PetriNetUnfolderBase]: 705/1650 cut-off events. [2024-01-30 14:15:21,893 INFO L125 PetriNetUnfolderBase]: For 49/69 co-relation queries the response was YES. [2024-01-30 14:15:21,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3085 conditions, 1650 events. 705/1650 cut-off events. For 49/69 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10726 event pairs, 306 based on Foata normal form. 100/1600 useless extension candidates. Maximal degree in co-relation 3078. Up to 999 conditions per place. [2024-01-30 14:15:21,903 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 55 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2024-01-30 14:15:21,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 343 flow [2024-01-30 14:15:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 208 transitions. [2024-01-30 14:15:21,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7123287671232876 [2024-01-30 14:15:21,904 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 158 flow. Second operand 4 states and 208 transitions. [2024-01-30 14:15:21,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 343 flow [2024-01-30 14:15:21,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 333 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:21,908 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 154 flow [2024-01-30 14:15:21,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-01-30 14:15:21,910 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2024-01-30 14:15:21,910 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 154 flow [2024-01-30 14:15:21,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:21,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:21,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:21,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-30 14:15:21,911 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:21,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:21,912 INFO L85 PathProgramCache]: Analyzing trace with hash -956596628, now seen corresponding path program 1 times [2024-01-30 14:15:21,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:21,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889128088] [2024-01-30 14:15:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:21,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:21,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:21,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889128088] [2024-01-30 14:15:21,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889128088] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:21,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:21,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:21,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336427546] [2024-01-30 14:15:21,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:21,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:21,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:21,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:21,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:22,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 73 [2024-01-30 14:15:22,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:22,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:22,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 73 [2024-01-30 14:15:22,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:22,435 INFO L124 PetriNetUnfolderBase]: 1821/3712 cut-off events. [2024-01-30 14:15:22,435 INFO L125 PetriNetUnfolderBase]: For 186/270 co-relation queries the response was YES. [2024-01-30 14:15:22,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7200 conditions, 3712 events. 1821/3712 cut-off events. For 186/270 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 24125 event pairs, 1208 based on Foata normal form. 96/3346 useless extension candidates. Maximal degree in co-relation 7193. Up to 1908 conditions per place. [2024-01-30 14:15:22,451 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 78 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2024-01-30 14:15:22,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 102 transitions, 412 flow [2024-01-30 14:15:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-01-30 14:15:22,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6575342465753424 [2024-01-30 14:15:22,453 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 154 flow. Second operand 4 states and 192 transitions. [2024-01-30 14:15:22,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 102 transitions, 412 flow [2024-01-30 14:15:22,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 409 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:22,457 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 175 flow [2024-01-30 14:15:22,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2024-01-30 14:15:22,459 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2024-01-30 14:15:22,459 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 175 flow [2024-01-30 14:15:22,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:22,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:22,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:22,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-30 14:15:22,460 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:22,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:22,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1186726412, now seen corresponding path program 1 times [2024-01-30 14:15:22,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:22,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783148763] [2024-01-30 14:15:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:22,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:22,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:22,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783148763] [2024-01-30 14:15:22,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783148763] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:22,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:22,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:22,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693618008] [2024-01-30 14:15:22,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:22,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:22,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:22,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:22,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:22,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 73 [2024-01-30 14:15:22,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:22,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:22,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 73 [2024-01-30 14:15:22,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:22,789 INFO L124 PetriNetUnfolderBase]: 925/2266 cut-off events. [2024-01-30 14:15:22,789 INFO L125 PetriNetUnfolderBase]: For 170/242 co-relation queries the response was YES. [2024-01-30 14:15:22,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4452 conditions, 2266 events. 925/2266 cut-off events. For 170/242 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 15741 event pairs, 116 based on Foata normal form. 62/2216 useless extension candidates. Maximal degree in co-relation 4444. Up to 1225 conditions per place. [2024-01-30 14:15:22,802 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 58 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2024-01-30 14:15:22,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 379 flow [2024-01-30 14:15:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-01-30 14:15:22,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7363013698630136 [2024-01-30 14:15:22,803 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 175 flow. Second operand 4 states and 215 transitions. [2024-01-30 14:15:22,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 379 flow [2024-01-30 14:15:22,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 92 transitions, 369 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:22,806 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 193 flow [2024-01-30 14:15:22,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2024-01-30 14:15:22,807 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2024-01-30 14:15:22,807 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 193 flow [2024-01-30 14:15:22,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:22,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:22,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:22,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-30 14:15:22,808 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:22,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1086133993, now seen corresponding path program 1 times [2024-01-30 14:15:22,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:22,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096291472] [2024-01-30 14:15:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:22,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:22,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:22,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096291472] [2024-01-30 14:15:22,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096291472] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-30 14:15:22,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942079155] [2024-01-30 14:15:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:22,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:22,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:22,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-30 14:15:22,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-30 14:15:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:23,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-30 14:15:23,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-30 14:15:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:23,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-30 14:15:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:24,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942079155] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-30 14:15:24,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-30 14:15:24,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-30 14:15:24,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933189803] [2024-01-30 14:15:24,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-30 14:15:24,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-30 14:15:24,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:24,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-30 14:15:24,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-30 14:15:24,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 73 [2024-01-30 14:15:24,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 193 flow. Second operand has 10 states, 10 states have (on average 29.4) internal successors, (294), 10 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:24,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:24,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 73 [2024-01-30 14:15:24,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:24,856 INFO L124 PetriNetUnfolderBase]: 2721/5170 cut-off events. [2024-01-30 14:15:24,856 INFO L125 PetriNetUnfolderBase]: For 1187/1351 co-relation queries the response was YES. [2024-01-30 14:15:24,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11169 conditions, 5170 events. 2721/5170 cut-off events. For 1187/1351 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 31196 event pairs, 51 based on Foata normal form. 698/5646 useless extension candidates. Maximal degree in co-relation 11158. Up to 1027 conditions per place. [2024-01-30 14:15:24,883 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 171 selfloop transitions, 7 changer transitions 0/198 dead transitions. [2024-01-30 14:15:24,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 198 transitions, 935 flow [2024-01-30 14:15:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-30 14:15:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-30 14:15:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 383 transitions. [2024-01-30 14:15:24,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6558219178082192 [2024-01-30 14:15:24,885 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 193 flow. Second operand 8 states and 383 transitions. [2024-01-30 14:15:24,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 198 transitions, 935 flow [2024-01-30 14:15:24,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 198 transitions, 927 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-30 14:15:24,891 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 212 flow [2024-01-30 14:15:24,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=212, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2024-01-30 14:15:24,891 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 8 predicate places. [2024-01-30 14:15:24,891 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 212 flow [2024-01-30 14:15:24,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.4) internal successors, (294), 10 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:24,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:24,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:24,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-30 14:15:25,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:25,103 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:25,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:25,104 INFO L85 PathProgramCache]: Analyzing trace with hash -258450797, now seen corresponding path program 1 times [2024-01-30 14:15:25,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:25,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033332665] [2024-01-30 14:15:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:25,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:25,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033332665] [2024-01-30 14:15:25,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033332665] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-30 14:15:25,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717170284] [2024-01-30 14:15:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:25,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:25,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:25,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-30 14:15:25,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-30 14:15:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:25,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-30 14:15:25,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-30 14:15:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:25,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-30 14:15:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:25,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717170284] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-30 14:15:25,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-30 14:15:25,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-30 14:15:25,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588326727] [2024-01-30 14:15:25,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-30 14:15:25,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-30 14:15:25,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:25,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-30 14:15:25,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-30 14:15:25,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 73 [2024-01-30 14:15:25,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 212 flow. Second operand has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:25,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:25,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 73 [2024-01-30 14:15:25,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:26,893 INFO L124 PetriNetUnfolderBase]: 4891/8705 cut-off events. [2024-01-30 14:15:26,894 INFO L125 PetriNetUnfolderBase]: For 5223/5334 co-relation queries the response was YES. [2024-01-30 14:15:26,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19856 conditions, 8705 events. 4891/8705 cut-off events. For 5223/5334 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 56459 event pairs, 135 based on Foata normal form. 1329/9315 useless extension candidates. Maximal degree in co-relation 19841. Up to 2016 conditions per place. [2024-01-30 14:15:26,936 INFO L140 encePairwiseOnDemand]: 62/73 looper letters, 154 selfloop transitions, 7 changer transitions 0/177 dead transitions. [2024-01-30 14:15:26,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 177 transitions, 982 flow [2024-01-30 14:15:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-30 14:15:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-30 14:15:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 369 transitions. [2024-01-30 14:15:26,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318493150684932 [2024-01-30 14:15:26,938 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 212 flow. Second operand 8 states and 369 transitions. [2024-01-30 14:15:26,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 177 transitions, 982 flow [2024-01-30 14:15:26,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 177 transitions, 917 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-01-30 14:15:26,946 INFO L231 Difference]: Finished difference. Result has 81 places, 60 transitions, 218 flow [2024-01-30 14:15:26,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=218, PETRI_PLACES=81, PETRI_TRANSITIONS=60} [2024-01-30 14:15:26,947 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 10 predicate places. [2024-01-30 14:15:26,947 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 60 transitions, 218 flow [2024-01-30 14:15:26,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:26,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:26,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:26,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-30 14:15:27,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-01-30 14:15:27,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:27,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:27,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1679666367, now seen corresponding path program 1 times [2024-01-30 14:15:27,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:27,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815096446] [2024-01-30 14:15:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:27,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:27,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:27,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815096446] [2024-01-30 14:15:27,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815096446] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:27,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:27,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:27,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674823883] [2024-01-30 14:15:27,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:27,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-30 14:15:27,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-30 14:15:27,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-30 14:15:27,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 73 [2024-01-30 14:15:27,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 60 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:27,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:27,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 73 [2024-01-30 14:15:27,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:27,794 INFO L124 PetriNetUnfolderBase]: 1613/4263 cut-off events. [2024-01-30 14:15:27,795 INFO L125 PetriNetUnfolderBase]: For 4050/4148 co-relation queries the response was YES. [2024-01-30 14:15:27,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9602 conditions, 4263 events. 1613/4263 cut-off events. For 4050/4148 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 26961 event pairs, 429 based on Foata normal form. 398/4475 useless extension candidates. Maximal degree in co-relation 9583. Up to 2028 conditions per place. [2024-01-30 14:15:27,814 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 52 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-01-30 14:15:27,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 430 flow [2024-01-30 14:15:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-30 14:15:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-30 14:15:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2024-01-30 14:15:27,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7488584474885844 [2024-01-30 14:15:27,816 INFO L175 Difference]: Start difference. First operand has 81 places, 60 transitions, 218 flow. Second operand 3 states and 164 transitions. [2024-01-30 14:15:27,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 430 flow [2024-01-30 14:15:27,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 410 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-01-30 14:15:27,821 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 215 flow [2024-01-30 14:15:27,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2024-01-30 14:15:27,823 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2024-01-30 14:15:27,823 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 215 flow [2024-01-30 14:15:27,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:27,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:27,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:27,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-30 14:15:27,824 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:27,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:27,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2141592471, now seen corresponding path program 1 times [2024-01-30 14:15:27,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:27,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891199664] [2024-01-30 14:15:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:27,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:27,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:27,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891199664] [2024-01-30 14:15:27,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891199664] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-30 14:15:27,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918312655] [2024-01-30 14:15:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:27,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:27,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:27,997 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-30 14:15:28,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-30 14:15:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:28,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-30 14:15:28,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-30 14:15:28,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-30 14:15:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:28,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-30 14:15:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:28,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918312655] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-30 14:15:28,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-30 14:15:28,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-01-30 14:15:28,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212834776] [2024-01-30 14:15:28,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-30 14:15:28,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-30 14:15:28,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:28,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-30 14:15:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-01-30 14:15:28,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:28,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 215 flow. Second operand has 9 states, 9 states have (on average 43.44444444444444) internal successors, (391), 9 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:28,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:28,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:28,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:29,762 INFO L124 PetriNetUnfolderBase]: 4997/12840 cut-off events. [2024-01-30 14:15:29,763 INFO L125 PetriNetUnfolderBase]: For 12180/12288 co-relation queries the response was YES. [2024-01-30 14:15:29,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30654 conditions, 12840 events. 4997/12840 cut-off events. For 12180/12288 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 108936 event pairs, 995 based on Foata normal form. 222/12757 useless extension candidates. Maximal degree in co-relation 30635. Up to 1911 conditions per place. [2024-01-30 14:15:29,961 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 203 selfloop transitions, 19 changer transitions 0/243 dead transitions. [2024-01-30 14:15:29,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 243 transitions, 1458 flow [2024-01-30 14:15:29,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-30 14:15:29,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-30 14:15:29,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 636 transitions. [2024-01-30 14:15:29,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.726027397260274 [2024-01-30 14:15:29,964 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 215 flow. Second operand 12 states and 636 transitions. [2024-01-30 14:15:29,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 243 transitions, 1458 flow [2024-01-30 14:15:29,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 243 transitions, 1436 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-30 14:15:30,013 INFO L231 Difference]: Finished difference. Result has 96 places, 78 transitions, 345 flow [2024-01-30 14:15:30,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=345, PETRI_PLACES=96, PETRI_TRANSITIONS=78} [2024-01-30 14:15:30,015 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 25 predicate places. [2024-01-30 14:15:30,015 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 78 transitions, 345 flow [2024-01-30 14:15:30,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 43.44444444444444) internal successors, (391), 9 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:30,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:30,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:30,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-30 14:15:30,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:30,216 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:30,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:30,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1793372820, now seen corresponding path program 1 times [2024-01-30 14:15:30,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:30,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906871759] [2024-01-30 14:15:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:30,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:31,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:31,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906871759] [2024-01-30 14:15:31,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906871759] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:31,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:31,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-30 14:15:31,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163585203] [2024-01-30 14:15:31,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:31,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-30 14:15:31,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-30 14:15:31,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-30 14:15:31,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:31,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 78 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 40.57142857142857) internal successors, (284), 7 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:31,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:31,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:31,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:32,814 INFO L124 PetriNetUnfolderBase]: 5195/13232 cut-off events. [2024-01-30 14:15:32,814 INFO L125 PetriNetUnfolderBase]: For 16113/16221 co-relation queries the response was YES. [2024-01-30 14:15:32,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33274 conditions, 13232 events. 5195/13232 cut-off events. For 16113/16221 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 113350 event pairs, 1223 based on Foata normal form. 124/13102 useless extension candidates. Maximal degree in co-relation 33247. Up to 6143 conditions per place. [2024-01-30 14:15:32,899 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 112 selfloop transitions, 13 changer transitions 0/146 dead transitions. [2024-01-30 14:15:32,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 146 transitions, 896 flow [2024-01-30 14:15:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-30 14:15:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-30 14:15:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 356 transitions. [2024-01-30 14:15:32,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6966731898238747 [2024-01-30 14:15:32,900 INFO L175 Difference]: Start difference. First operand has 96 places, 78 transitions, 345 flow. Second operand 7 states and 356 transitions. [2024-01-30 14:15:32,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 146 transitions, 896 flow [2024-01-30 14:15:32,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 882 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-30 14:15:32,937 INFO L231 Difference]: Finished difference. Result has 106 places, 84 transitions, 423 flow [2024-01-30 14:15:32,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=423, PETRI_PLACES=106, PETRI_TRANSITIONS=84} [2024-01-30 14:15:32,937 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 35 predicate places. [2024-01-30 14:15:32,937 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 84 transitions, 423 flow [2024-01-30 14:15:32,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.57142857142857) internal successors, (284), 7 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:32,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:32,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:32,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-30 14:15:32,938 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:32,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1867300367, now seen corresponding path program 1 times [2024-01-30 14:15:32,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:32,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431255672] [2024-01-30 14:15:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:32,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:33,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:33,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431255672] [2024-01-30 14:15:33,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431255672] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-30 14:15:33,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799669418] [2024-01-30 14:15:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:33,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:33,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:33,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-30 14:15:33,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-30 14:15:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:33,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-30 14:15:33,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-30 14:15:33,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-30 14:15:33,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-01-30 14:15:33,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-01-30 14:15:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:33,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-30 14:15:34,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-01-30 14:15:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:34,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799669418] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-30 14:15:34,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-30 14:15:34,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-01-30 14:15:34,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843312550] [2024-01-30 14:15:34,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-30 14:15:34,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-30 14:15:34,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:34,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-30 14:15:34,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-01-30 14:15:34,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:34,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 84 transitions, 423 flow. Second operand has 20 states, 20 states have (on average 41.75) internal successors, (835), 20 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:34,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:34,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:34,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:41,026 INFO L124 PetriNetUnfolderBase]: 13041/31998 cut-off events. [2024-01-30 14:15:41,026 INFO L125 PetriNetUnfolderBase]: For 51633/51781 co-relation queries the response was YES. [2024-01-30 14:15:41,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85806 conditions, 31998 events. 13041/31998 cut-off events. For 51633/51781 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 309439 event pairs, 1703 based on Foata normal form. 316/31968 useless extension candidates. Maximal degree in co-relation 85773. Up to 4592 conditions per place. [2024-01-30 14:15:41,293 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 633 selfloop transitions, 110 changer transitions 0/764 dead transitions. [2024-01-30 14:15:41,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 764 transitions, 5334 flow [2024-01-30 14:15:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-01-30 14:15:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-01-30 14:15:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2461 transitions. [2024-01-30 14:15:41,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6742465753424658 [2024-01-30 14:15:41,305 INFO L175 Difference]: Start difference. First operand has 106 places, 84 transitions, 423 flow. Second operand 50 states and 2461 transitions. [2024-01-30 14:15:41,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 764 transitions, 5334 flow [2024-01-30 14:15:41,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 764 transitions, 5334 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-30 14:15:41,471 INFO L231 Difference]: Finished difference. Result has 159 places, 190 transitions, 1308 flow [2024-01-30 14:15:41,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=1308, PETRI_PLACES=159, PETRI_TRANSITIONS=190} [2024-01-30 14:15:41,471 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 88 predicate places. [2024-01-30 14:15:41,472 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 190 transitions, 1308 flow [2024-01-30 14:15:41,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 41.75) internal successors, (835), 20 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:41,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:41,472 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:41,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-30 14:15:41,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:41,683 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err8ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:41,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash 479940281, now seen corresponding path program 1 times [2024-01-30 14:15:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:41,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681416994] [2024-01-30 14:15:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:41,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-01-30 14:15:42,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:42,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681416994] [2024-01-30 14:15:42,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681416994] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:42,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:42,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-30 14:15:42,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593610885] [2024-01-30 14:15:42,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:42,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-30 14:15:42,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:42,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-30 14:15:42,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-30 14:15:42,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 73 [2024-01-30 14:15:42,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 190 transitions, 1308 flow. Second operand has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:42,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:42,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 73 [2024-01-30 14:15:42,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:49,944 INFO L124 PetriNetUnfolderBase]: 24449/49878 cut-off events. [2024-01-30 14:15:49,945 INFO L125 PetriNetUnfolderBase]: For 71941/72135 co-relation queries the response was YES. [2024-01-30 14:15:50,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141388 conditions, 49878 events. 24449/49878 cut-off events. For 71941/72135 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 454322 event pairs, 6371 based on Foata normal form. 74/49587 useless extension candidates. Maximal degree in co-relation 141349. Up to 23485 conditions per place. [2024-01-30 14:15:50,576 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 399 selfloop transitions, 9 changer transitions 3/458 dead transitions. [2024-01-30 14:15:50,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 458 transitions, 3894 flow [2024-01-30 14:15:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-30 14:15:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-30 14:15:50,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 274 transitions. [2024-01-30 14:15:50,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6255707762557078 [2024-01-30 14:15:50,591 INFO L175 Difference]: Start difference. First operand has 159 places, 190 transitions, 1308 flow. Second operand 6 states and 274 transitions. [2024-01-30 14:15:50,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 458 transitions, 3894 flow [2024-01-30 14:15:51,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 458 transitions, 3440 flow, removed 213 selfloop flow, removed 4 redundant places. [2024-01-30 14:15:51,146 INFO L231 Difference]: Finished difference. Result has 159 places, 190 transitions, 1138 flow [2024-01-30 14:15:51,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1138, PETRI_PLACES=159, PETRI_TRANSITIONS=190} [2024-01-30 14:15:51,148 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 88 predicate places. [2024-01-30 14:15:51,148 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 190 transitions, 1138 flow [2024-01-30 14:15:51,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:51,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:51,148 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:51,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-30 14:15:51,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:15:51,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:51,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1952290508, now seen corresponding path program 1 times [2024-01-30 14:15:51,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:51,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127320970] [2024-01-30 14:15:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:51,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-30 14:15:51,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:51,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127320970] [2024-01-30 14:15:51,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127320970] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-30 14:15:51,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622577878] [2024-01-30 14:15:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:51,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:15:51,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:51,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-30 14:15:51,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-30 14:15:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:51,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-30 14:15:51,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-30 14:15:51,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-30 14:15:51,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-30 14:15:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:51,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-30 14:15:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-30 14:15:51,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622577878] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-30 14:15:51,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-30 14:15:51,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 16 [2024-01-30 14:15:51,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684845247] [2024-01-30 14:15:51,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-30 14:15:51,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-30 14:15:51,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:51,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-30 14:15:51,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-01-30 14:15:51,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:15:51,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 190 transitions, 1138 flow. Second operand has 16 states, 16 states have (on average 43.625) internal successors, (698), 16 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:51,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:51,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:15:51,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:00,312 INFO L124 PetriNetUnfolderBase]: 19599/47910 cut-off events. [2024-01-30 14:16:00,313 INFO L125 PetriNetUnfolderBase]: For 103076/103116 co-relation queries the response was YES. [2024-01-30 14:16:00,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137510 conditions, 47910 events. 19599/47910 cut-off events. For 103076/103116 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 475568 event pairs, 3011 based on Foata normal form. 490/48081 useless extension candidates. Maximal degree in co-relation 137473. Up to 6842 conditions per place. [2024-01-30 14:16:00,895 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 506 selfloop transitions, 138 changer transitions 6/671 dead transitions. [2024-01-30 14:16:00,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 671 transitions, 5068 flow [2024-01-30 14:16:00,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-30 14:16:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-30 14:16:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1260 transitions. [2024-01-30 14:16:00,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7191780821917808 [2024-01-30 14:16:00,897 INFO L175 Difference]: Start difference. First operand has 159 places, 190 transitions, 1138 flow. Second operand 24 states and 1260 transitions. [2024-01-30 14:16:00,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 671 transitions, 5068 flow [2024-01-30 14:16:01,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 671 transitions, 4867 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-01-30 14:16:01,545 INFO L231 Difference]: Finished difference. Result has 190 places, 266 transitions, 2118 flow [2024-01-30 14:16:01,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2118, PETRI_PLACES=190, PETRI_TRANSITIONS=266} [2024-01-30 14:16:01,546 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 119 predicate places. [2024-01-30 14:16:01,546 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 266 transitions, 2118 flow [2024-01-30 14:16:01,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 43.625) internal successors, (698), 16 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:01,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:01,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:16:01,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-30 14:16:01,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-30 14:16:01,759 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-01-30 14:16:01,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash 83260793, now seen corresponding path program 1 times [2024-01-30 14:16:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:01,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690172911] [2024-01-30 14:16:01,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:01,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:02,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:02,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690172911] [2024-01-30 14:16:02,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690172911] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-30 14:16:02,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489665132] [2024-01-30 14:16:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:02,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-30 14:16:02,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:16:02,985 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-30 14:16:02,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-30 14:16:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:03,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-30 14:16:03,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-30 14:16:03,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-30 14:16:03,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2024-01-30 14:16:03,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-01-30 14:16:03,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 29 [2024-01-30 14:16:04,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-30 14:16:04,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 57 [2024-01-30 14:16:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:04,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-30 14:16:04,849 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 [2024-01-30 14:16:04,895 INFO L349 Elim1Store]: treesize reduction 43, result has 48.2 percent of original size [2024-01-30 14:16:04,896 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 [2024-01-30 14:16:04,994 INFO L349 Elim1Store]: treesize reduction 18, result has 55.0 percent of original size [2024-01-30 14:16:04,994 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 [2024-01-30 14:16:05,133 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-01-30 14:16:05,133 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 [2024-01-30 14:16:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:05,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489665132] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-30 14:16:05,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-30 14:16:05,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-01-30 14:16:05,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212894789] [2024-01-30 14:16:05,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-30 14:16:05,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-30 14:16:05,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:05,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-30 14:16:05,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2024-01-30 14:16:05,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-01-30 14:16:05,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 266 transitions, 2118 flow. Second operand has 25 states, 25 states have (on average 41.72) internal successors, (1043), 25 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:16:05,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:05,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-01-30 14:16:05,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand