./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-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_longer-2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ab2e0ac4 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_longer-2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longer-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-ab2e0ac-m [2024-01-29 14:11:21,787 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-29 14:11:21,842 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-29 14:11:21,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-29 14:11:21,846 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-29 14:11:21,863 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-29 14:11:21,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-29 14:11:21,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-29 14:11:21,865 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-29 14:11:21,869 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-29 14:11:21,870 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-29 14:11:21,870 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-29 14:11:21,871 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-29 14:11:21,872 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-29 14:11:21,872 INFO L153 SettingsManager]: * Use SBE=true [2024-01-29 14:11:21,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-29 14:11:21,873 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-29 14:11:21,873 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-29 14:11:21,873 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-29 14:11:21,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-29 14:11:21,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-29 14:11:21,874 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-29 14:11:21,874 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-29 14:11:21,874 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-29 14:11:21,874 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-29 14:11:21,875 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-29 14:11:21,875 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-29 14:11:21,875 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-29 14:11:21,875 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-29 14:11:21,876 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-29 14:11:21,876 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-29 14:11:21,877 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-29 14:11:21,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-29 14:11:21,877 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-29 14:11:21,877 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-29 14:11:21,877 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-29 14:11:21,878 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-29 14:11:21,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-29 14:11:21,878 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-29 14:11:21,878 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-29 14:11:21,878 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-29 14:11:21,879 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-29 14:11:21,879 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-29 14:11:21,879 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-29 14:11:22,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-29 14:11:22,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-29 14:11:22,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-29 14:11:22,107 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-29 14:11:22,107 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-29 14:11:22,108 INFO L431 ainManager$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_longer-2.yml/witness.yml [2024-01-29 14:11:22,204 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-29 14:11:22,205 INFO L274 PluginConnector]: CDTParser initialized [2024-01-29 14:11:22,206 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2024-01-29 14:11:23,170 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-29 14:11:23,377 INFO L384 CDTParser]: Found 1 translation units. [2024-01-29 14:11:23,377 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2024-01-29 14:11:23,393 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8295d9e2f/03a0f9ed6751403a869fd238248775c9/FLAG6a1f8818a [2024-01-29 14:11:23,403 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8295d9e2f/03a0f9ed6751403a869fd238248775c9 [2024-01-29 14:11:23,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-29 14:11:23,406 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-29 14:11:23,407 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-29 14:11:23,407 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-29 14:11:23,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-29 14:11:23,411 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 02:11:22" (1/2) ... [2024-01-29 14:11:23,412 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ec987c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 02:11:23, skipping insertion in model container [2024-01-29 14:11:23,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 02:11:22" (1/2) ... [2024-01-29 14:11:23,414 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@740c5fa6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 02:11:23, skipping insertion in model container [2024-01-29 14:11:23,414 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 02:11:23" (2/2) ... [2024-01-29 14:11:23,415 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ec987c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:23, skipping insertion in model container [2024-01-29 14:11:23,415 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 02:11:23" (2/2) ... [2024-01-29 14:11:23,415 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-29 14:11:23,463 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-29 14:11:23,464 INFO L98 nessWitnessExtractor]: Location invariant before [L1007-L1007] (unsigned long )arg == 0UL [2024-01-29 14:11:23,464 INFO L98 nessWitnessExtractor]: Location invariant before [L1007-L1007] (((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || i == 7) || i == 6 [2024-01-29 14:11:23,464 INFO L98 nessWitnessExtractor]: Location invariant before [L1000-L1000] i == 400 [2024-01-29 14:11:23,464 INFO L98 nessWitnessExtractor]: Location invariant before [L1000-L1000] (unsigned long )arg == 0UL [2024-01-29 14:11:23,464 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L997] ((((((((((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 <= 399)) || (5 <= i && i <= 399)) || i == 4 [2024-01-29 14:11:23,464 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L997] (unsigned long )arg == 0UL [2024-01-29 14:11:23,465 INFO L98 nessWitnessExtractor]: Location invariant after [L996-L997] ((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 399)) || i == 4 [2024-01-29 14:11:23,465 INFO L98 nessWitnessExtractor]: Location invariant after [L996-L997] (unsigned long )arg == 0UL [2024-01-29 14:11:23,465 INFO L98 nessWitnessExtractor]: Loop invariant at [L1005-L1014] (unsigned long )arg == 0UL [2024-01-29 14:11:23,465 INFO L98 nessWitnessExtractor]: Location invariant before [L1020-L1020] flag == (_Bool)0 [2024-01-29 14:11:23,465 INFO L98 nessWitnessExtractor]: Location invariant before [L1008-L1012] (((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || i == 7) || i == 6 [2024-01-29 14:11:23,465 INFO L98 nessWitnessExtractor]: Location invariant before [L1008-L1012] (unsigned long )arg == 0UL [2024-01-29 14:11:23,465 INFO L98 nessWitnessExtractor]: Location invariant before [L993-L993] ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 399) [2024-01-29 14:11:23,465 INFO L98 nessWitnessExtractor]: Location invariant before [L993-L993] (unsigned long )arg == 0UL [2024-01-29 14:11:23,466 INFO L98 nessWitnessExtractor]: Loop invariant at [L991-L999] (unsigned long )arg == 0UL [2024-01-29 14:11:23,466 INFO L98 nessWitnessExtractor]: Location invariant before [L995-L995] (unsigned long )arg == 0UL [2024-01-29 14:11:23,466 INFO L98 nessWitnessExtractor]: Location invariant before [L995-L995] ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 399) [2024-01-29 14:11:23,466 INFO L98 nessWitnessExtractor]: Location invariant before [L1015-L1015] i == 400 [2024-01-29 14:11:23,466 INFO L98 nessWitnessExtractor]: Location invariant before [L1015-L1015] (unsigned long )arg == 0UL [2024-01-29 14:11:23,466 INFO L98 nessWitnessExtractor]: Location invariant before [L998-L998] (unsigned long )arg == 0UL [2024-01-29 14:11:23,467 INFO L98 nessWitnessExtractor]: Location invariant before [L998-L998] ((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 399)) || i == 4 [2024-01-29 14:11:23,467 INFO L98 nessWitnessExtractor]: Location invariant before [L994-L994] ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 399) [2024-01-29 14:11:23,467 INFO L98 nessWitnessExtractor]: Location invariant before [L994-L994] (unsigned long )arg == 0UL [2024-01-29 14:11:23,467 INFO L98 nessWitnessExtractor]: Location invariant after [L1010-L1011] (((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || i == 7) || i == 6 [2024-01-29 14:11:23,467 INFO L98 nessWitnessExtractor]: Location invariant before [L1010-L1011] (((((((((((((((i == 5 || i == 4) || i == 4) || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || i == 7) || i == 7) || i == 6) || i == 6 [2024-01-29 14:11:23,468 INFO L98 nessWitnessExtractor]: Location invariant after [L1010-L1011] (unsigned long )arg == 0UL [2024-01-29 14:11:23,468 INFO L98 nessWitnessExtractor]: Location invariant before [L1010-L1011] (unsigned long )arg == 0UL [2024-01-29 14:11:23,468 INFO L98 nessWitnessExtractor]: Location invariant before [L1021-L1021] flag == (_Bool)0 [2024-01-29 14:11:23,468 INFO L98 nessWitnessExtractor]: Location invariant before [L1013-L1013] (((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || i == 7) || i == 6 [2024-01-29 14:11:23,468 INFO L98 nessWitnessExtractor]: Location invariant before [L1013-L1013] (unsigned long )arg == 0UL [2024-01-29 14:11:23,508 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-29 14:11:23,916 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_longer-2.i[41529,41542] [2024-01-29 14:11:23,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-29 14:11:23,957 INFO L202 MainTranslator]: Completed pre-run [2024-01-29 14:11:23,991 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_longer-2.i[41529,41542] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-29 14:11:24,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-29 14:11:24,132 INFO L206 MainTranslator]: Completed translation [2024-01-29 14:11:24,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24 WrapperNode [2024-01-29 14:11:24,133 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-29 14:11:24,134 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-29 14:11:24,134 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-29 14:11:24,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-29 14:11:24,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (1/1) ... [2024-01-29 14:11:24,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (1/1) ... [2024-01-29 14:11:24,199 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 188 [2024-01-29 14:11:24,199 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-29 14:11:24,200 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-29 14:11:24,200 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-29 14:11:24,200 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-29 14:11:24,208 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (1/1) ... [2024-01-29 14:11:24,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (1/1) ... [2024-01-29 14:11:24,214 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (1/1) ... [2024-01-29 14:11:24,226 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 2, 5, 3]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 0, 5, 0]. The 4 writes are split as follows [0, 1, 1, 0, 2]. [2024-01-29 14:11:24,226 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (1/1) ... [2024-01-29 14:11:24,226 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (1/1) ... [2024-01-29 14:11:24,235 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (1/1) ... [2024-01-29 14:11:24,241 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (1/1) ... [2024-01-29 14:11:24,244 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (1/1) ... [2024-01-29 14:11:24,245 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (1/1) ... [2024-01-29 14:11:24,264 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-29 14:11:24,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-29 14:11:24,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-29 14:11:24,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-29 14:11:24,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (1/1) ... [2024-01-29 14:11:24,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-29 14:11:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:11:24,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-29 14:11:24,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-29 14:11:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-29 14:11:24,322 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-29 14:11:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-29 14:11:24,322 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-29 14:11:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-29 14:11:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-29 14:11:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-29 14:11:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-29 14:11:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-29 14:11:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-29 14:11:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-29 14:11:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-29 14:11:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-29 14:11:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-29 14:11:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-29 14:11:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-29 14:11:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-29 14:11:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-29 14:11:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-29 14:11:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-29 14:11:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-29 14:11:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-29 14:11:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-29 14:11:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-29 14:11:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-29 14:11:24,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-29 14:11:24,328 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-29 14:11:24,468 INFO L244 CfgBuilder]: Building ICFG [2024-01-29 14:11:24,470 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-29 14:11:24,735 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-29 14:11:24,735 INFO L293 CfgBuilder]: Performing block encoding [2024-01-29 14:11:24,912 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-29 14:11:24,912 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-29 14:11:24,914 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 02:11:24 BoogieIcfgContainer [2024-01-29 14:11:24,914 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-29 14:11:24,916 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-29 14:11:24,916 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-29 14:11:24,919 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-29 14:11:24,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 02:11:22" (1/4) ... [2024-01-29 14:11:24,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309b41d9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 29.01 02:11:24, skipping insertion in model container [2024-01-29 14:11:24,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.01 02:11:23" (2/4) ... [2024-01-29 14:11:24,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309b41d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 02:11:24, skipping insertion in model container [2024-01-29 14:11:24,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 02:11:24" (3/4) ... [2024-01-29 14:11:24,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309b41d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 02:11:24, skipping insertion in model container [2024-01-29 14:11:24,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 02:11:24" (4/4) ... [2024-01-29 14:11:24,922 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2024-01-29 14:11:24,936 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-29 14:11:24,936 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-01-29 14:11:24,936 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-29 14:11:25,025 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-29 14:11:25,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 99 transitions, 212 flow [2024-01-29 14:11:25,094 INFO L124 PetriNetUnfolderBase]: 5/97 cut-off events. [2024-01-29 14:11:25,094 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-29 14:11:25,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 5/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 314 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2024-01-29 14:11:25,098 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 99 transitions, 212 flow [2024-01-29 14:11:25,101 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 95 transitions, 199 flow [2024-01-29 14:11:25,110 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-29 14:11:25,115 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;@67a0f8ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-29 14:11:25,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2024-01-29 14:11:25,117 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-29 14:11:25,117 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-29 14:11:25,117 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-29 14:11:25,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:25,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-29 14:11:25,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:25,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:25,121 INFO L85 PathProgramCache]: Analyzing trace with hash 15795, now seen corresponding path program 1 times [2024-01-29 14:11:25,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:25,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194475782] [2024-01-29 14:11:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:25,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:25,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194475782] [2024-01-29 14:11:25,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194475782] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:11:25,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:11:25,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-29 14:11:25,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318213] [2024-01-29 14:11:25,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:11:25,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 14:11:25,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:25,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 14:11:25,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 14:11:25,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 14:11:25,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:25,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:25,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 14:11:25,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:25,659 INFO L124 PetriNetUnfolderBase]: 470/1557 cut-off events. [2024-01-29 14:11:25,660 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-01-29 14:11:25,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2337 conditions, 1557 events. 470/1557 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 11594 event pairs, 357 based on Foata normal form. 48/1127 useless extension candidates. Maximal degree in co-relation 2193. Up to 740 conditions per place. [2024-01-29 14:11:25,674 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 28 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2024-01-29 14:11:25,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 249 flow [2024-01-29 14:11:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 14:11:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 14:11:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-01-29 14:11:25,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7575757575757576 [2024-01-29 14:11:25,688 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 199 flow. Second operand 3 states and 225 transitions. [2024-01-29 14:11:25,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 249 flow [2024-01-29 14:11:25,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 244 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-29 14:11:25,698 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 188 flow [2024-01-29 14:11:25,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2024-01-29 14:11:25,703 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -3 predicate places. [2024-01-29 14:11:25,703 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 188 flow [2024-01-29 14:11:25,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:25,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:25,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-29 14:11:25,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-29 14:11:25,705 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:25,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1716767669, now seen corresponding path program 1 times [2024-01-29 14:11:25,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:25,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021009002] [2024-01-29 14:11:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:25,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:25,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:25,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021009002] [2024-01-29 14:11:25,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021009002] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:11:25,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:11:25,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 14:11:25,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027651439] [2024-01-29 14:11:25,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:11:25,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 14:11:25,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:25,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 14:11:25,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 14:11:25,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 99 [2024-01-29 14:11:25,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:25,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:25,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 99 [2024-01-29 14:11:25,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:26,151 INFO L124 PetriNetUnfolderBase]: 472/1576 cut-off events. [2024-01-29 14:11:26,152 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-29 14:11:26,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2346 conditions, 1576 events. 472/1576 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 11657 event pairs, 185 based on Foata normal form. 186/1385 useless extension candidates. Maximal degree in co-relation 2340. Up to 704 conditions per place. [2024-01-29 14:11:26,160 INFO L140 encePairwiseOnDemand]: 88/99 looper letters, 39 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-01-29 14:11:26,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 278 flow [2024-01-29 14:11:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 14:11:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 14:11:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 278 transitions. [2024-01-29 14:11:26,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.702020202020202 [2024-01-29 14:11:26,165 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 188 flow. Second operand 4 states and 278 transitions. [2024-01-29 14:11:26,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 278 flow [2024-01-29 14:11:26,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 94 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 14:11:26,168 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 173 flow [2024-01-29 14:11:26,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2024-01-29 14:11:26,169 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -10 predicate places. [2024-01-29 14:11:26,169 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 173 flow [2024-01-29 14:11:26,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:26,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:26,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:26,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-29 14:11:26,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:26,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:26,173 INFO L85 PathProgramCache]: Analyzing trace with hash 546357003, now seen corresponding path program 1 times [2024-01-29 14:11:26,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:26,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976107591] [2024-01-29 14:11:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:26,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:26,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:26,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976107591] [2024-01-29 14:11:26,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976107591] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:11:26,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:11:26,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 14:11:26,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387073407] [2024-01-29 14:11:26,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:11:26,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 14:11:26,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:26,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 14:11:26,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 14:11:26,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 99 [2024-01-29 14:11:26,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:26,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:26,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 99 [2024-01-29 14:11:26,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:26,520 INFO L124 PetriNetUnfolderBase]: 452/1350 cut-off events. [2024-01-29 14:11:26,520 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-29 14:11:26,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2088 conditions, 1350 events. 452/1350 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9476 event pairs, 18 based on Foata normal form. 208/1353 useless extension candidates. Maximal degree in co-relation 2082. Up to 594 conditions per place. [2024-01-29 14:11:26,528 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 52 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2024-01-29 14:11:26,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 320 flow [2024-01-29 14:11:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 14:11:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 14:11:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 294 transitions. [2024-01-29 14:11:26,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7424242424242424 [2024-01-29 14:11:26,530 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 173 flow. Second operand 4 states and 294 transitions. [2024-01-29 14:11:26,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 320 flow [2024-01-29 14:11:26,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 99 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 14:11:26,533 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 158 flow [2024-01-29 14:11:26,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2024-01-29 14:11:26,534 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -17 predicate places. [2024-01-29 14:11:26,534 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 158 flow [2024-01-29 14:11:26,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:26,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:26,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:26,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-29 14:11:26,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:26,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:26,536 INFO L85 PathProgramCache]: Analyzing trace with hash -244390318, now seen corresponding path program 1 times [2024-01-29 14:11:26,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:26,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541173097] [2024-01-29 14:11:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:26,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:26,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:26,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541173097] [2024-01-29 14:11:26,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541173097] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:11:26,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:11:26,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-29 14:11:26,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421931310] [2024-01-29 14:11:26,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:11:26,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 14:11:26,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:26,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 14:11:26,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 14:11:26,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 99 [2024-01-29 14:11:26,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:26,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:26,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 99 [2024-01-29 14:11:26,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:26,771 INFO L124 PetriNetUnfolderBase]: 902/2308 cut-off events. [2024-01-29 14:11:26,771 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-01-29 14:11:26,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 2308 events. 902/2308 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 16065 event pairs, 539 based on Foata normal form. 102/2030 useless extension candidates. Maximal degree in co-relation 3909. Up to 1000 conditions per place. [2024-01-29 14:11:26,783 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 53 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-01-29 14:11:26,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 94 transitions, 314 flow [2024-01-29 14:11:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 14:11:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 14:11:26,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2024-01-29 14:11:26,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8148148148148148 [2024-01-29 14:11:26,784 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 158 flow. Second operand 3 states and 242 transitions. [2024-01-29 14:11:26,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 94 transitions, 314 flow [2024-01-29 14:11:26,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 14:11:26,786 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 179 flow [2024-01-29 14:11:26,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-01-29 14:11:26,787 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -16 predicate places. [2024-01-29 14:11:26,787 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 179 flow [2024-01-29 14:11:26,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:26,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:26,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:26,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-29 14:11:26,788 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:26,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:26,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1063088654, now seen corresponding path program 1 times [2024-01-29 14:11:26,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:26,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537123441] [2024-01-29 14:11:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:26,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:26,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:26,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537123441] [2024-01-29 14:11:26,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537123441] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:11:26,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:11:26,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-29 14:11:26,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510117615] [2024-01-29 14:11:26,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:11:26,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 14:11:26,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:26,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 14:11:26,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 14:11:26,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 99 [2024-01-29 14:11:26,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:26,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:26,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 99 [2024-01-29 14:11:26,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:27,138 INFO L124 PetriNetUnfolderBase]: 1333/3627 cut-off events. [2024-01-29 14:11:27,139 INFO L125 PetriNetUnfolderBase]: For 211/221 co-relation queries the response was YES. [2024-01-29 14:11:27,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6235 conditions, 3627 events. 1333/3627 cut-off events. For 211/221 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 28743 event pairs, 795 based on Foata normal form. 200/3469 useless extension candidates. Maximal degree in co-relation 6228. Up to 1535 conditions per place. [2024-01-29 14:11:27,155 INFO L140 encePairwiseOnDemand]: 91/99 looper letters, 54 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-01-29 14:11:27,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 96 transitions, 345 flow [2024-01-29 14:11:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 14:11:27,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 14:11:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2024-01-29 14:11:27,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2024-01-29 14:11:27,156 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 179 flow. Second operand 3 states and 243 transitions. [2024-01-29 14:11:27,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 96 transitions, 345 flow [2024-01-29 14:11:27,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 96 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 14:11:27,161 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 199 flow [2024-01-29 14:11:27,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2024-01-29 14:11:27,162 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -14 predicate places. [2024-01-29 14:11:27,163 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 199 flow [2024-01-29 14:11:27,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:27,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:27,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:27,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-29 14:11:27,163 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:27,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:27,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1688337316, now seen corresponding path program 1 times [2024-01-29 14:11:27,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:27,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87891461] [2024-01-29 14:11:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:27,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:27,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:27,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87891461] [2024-01-29 14:11:27,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87891461] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:11:27,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:11:27,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 14:11:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004987102] [2024-01-29 14:11:27,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:11:27,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 14:11:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 14:11:27,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 14:11:27,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 99 [2024-01-29 14:11:27,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:27,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:27,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 99 [2024-01-29 14:11:27,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:27,512 INFO L124 PetriNetUnfolderBase]: 925/2718 cut-off events. [2024-01-29 14:11:27,512 INFO L125 PetriNetUnfolderBase]: For 253/279 co-relation queries the response was YES. [2024-01-29 14:11:27,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4919 conditions, 2718 events. 925/2718 cut-off events. For 253/279 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 20571 event pairs, 116 based on Foata normal form. 20/2637 useless extension candidates. Maximal degree in co-relation 4911. Up to 1225 conditions per place. [2024-01-29 14:11:27,525 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 58 selfloop transitions, 3 changer transitions 0/105 dead transitions. [2024-01-29 14:11:27,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 105 transitions, 405 flow [2024-01-29 14:11:27,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 14:11:27,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 14:11:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 319 transitions. [2024-01-29 14:11:27,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8055555555555556 [2024-01-29 14:11:27,527 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 199 flow. Second operand 4 states and 319 transitions. [2024-01-29 14:11:27,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 105 transitions, 405 flow [2024-01-29 14:11:27,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 105 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 14:11:27,530 INFO L231 Difference]: Finished difference. Result has 87 places, 78 transitions, 219 flow [2024-01-29 14:11:27,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=87, PETRI_TRANSITIONS=78} [2024-01-29 14:11:27,530 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -10 predicate places. [2024-01-29 14:11:27,531 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 78 transitions, 219 flow [2024-01-29 14:11:27,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:27,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:27,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:27,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-29 14:11:27,532 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:27,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:27,532 INFO L85 PathProgramCache]: Analyzing trace with hash -432232040, now seen corresponding path program 1 times [2024-01-29 14:11:27,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:27,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661366006] [2024-01-29 14:11:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:27,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:27,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:27,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661366006] [2024-01-29 14:11:27,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661366006] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:11:27,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167890779] [2024-01-29 14:11:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:27,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:11:27,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:11:27,641 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:11:27,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-29 14:11:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:27,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-29 14:11:27,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:11:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:27,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:11:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:27,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167890779] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:11:27,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:11:27,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2024-01-29 14:11:27,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618065576] [2024-01-29 14:11:27,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:11:27,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-29 14:11:27,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-29 14:11:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-29 14:11:27,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 99 [2024-01-29 14:11:27,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:27,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:27,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 99 [2024-01-29 14:11:27,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:28,338 INFO L124 PetriNetUnfolderBase]: 2019/4778 cut-off events. [2024-01-29 14:11:28,338 INFO L125 PetriNetUnfolderBase]: For 1008/1054 co-relation queries the response was YES. [2024-01-29 14:11:28,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9352 conditions, 4778 events. 2019/4778 cut-off events. For 1008/1054 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 34833 event pairs, 361 based on Foata normal form. 416/4981 useless extension candidates. Maximal degree in co-relation 9341. Up to 974 conditions per place. [2024-01-29 14:11:28,360 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 123 selfloop transitions, 5 changer transitions 0/163 dead transitions. [2024-01-29 14:11:28,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 163 transitions, 729 flow [2024-01-29 14:11:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-29 14:11:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-29 14:11:28,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2024-01-29 14:11:28,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7760942760942761 [2024-01-29 14:11:28,377 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 219 flow. Second operand 6 states and 461 transitions. [2024-01-29 14:11:28,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 163 transitions, 729 flow [2024-01-29 14:11:28,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 163 transitions, 723 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 14:11:28,380 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 226 flow [2024-01-29 14:11:28,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2024-01-29 14:11:28,381 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -8 predicate places. [2024-01-29 14:11:28,381 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 226 flow [2024-01-29 14:11:28,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:28,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:28,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:28,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-29 14:11:28,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:11:28,582 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:28,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:28,583 INFO L85 PathProgramCache]: Analyzing trace with hash 539710309, now seen corresponding path program 1 times [2024-01-29 14:11:28,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:28,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175006127] [2024-01-29 14:11:28,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:28,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:28,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:28,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175006127] [2024-01-29 14:11:28,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175006127] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:11:28,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557063394] [2024-01-29 14:11:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:28,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:11:28,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:11:28,787 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:11:28,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-29 14:11:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:28,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-29 14:11:28,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:11:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:28,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:11:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:28,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557063394] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:11:28,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:11:28,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2024-01-29 14:11:28,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360292771] [2024-01-29 14:11:28,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:11:28,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-29 14:11:28,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:28,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-29 14:11:28,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-29 14:11:28,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 99 [2024-01-29 14:11:28,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:28,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:28,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 99 [2024-01-29 14:11:28,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:29,590 INFO L124 PetriNetUnfolderBase]: 2727/6294 cut-off events. [2024-01-29 14:11:29,590 INFO L125 PetriNetUnfolderBase]: For 2969/2969 co-relation queries the response was YES. [2024-01-29 14:11:29,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12881 conditions, 6294 events. 2727/6294 cut-off events. For 2969/2969 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 45840 event pairs, 338 based on Foata normal form. 644/6532 useless extension candidates. Maximal degree in co-relation 12867. Up to 1534 conditions per place. [2024-01-29 14:11:29,624 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 110 selfloop transitions, 5 changer transitions 0/145 dead transitions. [2024-01-29 14:11:29,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 145 transitions, 712 flow [2024-01-29 14:11:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-29 14:11:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-29 14:11:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 449 transitions. [2024-01-29 14:11:29,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7558922558922558 [2024-01-29 14:11:29,626 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 226 flow. Second operand 6 states and 449 transitions. [2024-01-29 14:11:29,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 145 transitions, 712 flow [2024-01-29 14:11:29,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 677 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-01-29 14:11:29,633 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 224 flow [2024-01-29 14:11:29,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2024-01-29 14:11:29,635 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -8 predicate places. [2024-01-29 14:11:29,635 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 224 flow [2024-01-29 14:11:29,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:29,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:29,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:29,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-29 14:11:29,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-01-29 14:11:29,848 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:29,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash 794914412, now seen corresponding path program 1 times [2024-01-29 14:11:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:29,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969981610] [2024-01-29 14:11:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:29,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:29,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:29,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969981610] [2024-01-29 14:11:29,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969981610] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:11:29,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:11:29,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 14:11:29,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642790352] [2024-01-29 14:11:29,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:11:29,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 14:11:29,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:29,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 14:11:29,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 14:11:29,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 99 [2024-01-29 14:11:29,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:29,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:29,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 99 [2024-01-29 14:11:29,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:30,278 INFO L124 PetriNetUnfolderBase]: 1055/3418 cut-off events. [2024-01-29 14:11:30,278 INFO L125 PetriNetUnfolderBase]: For 2109/2109 co-relation queries the response was YES. [2024-01-29 14:11:30,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6887 conditions, 3418 events. 1055/3418 cut-off events. For 2109/2109 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 22193 event pairs, 297 based on Foata normal form. 168/3465 useless extension candidates. Maximal degree in co-relation 6870. Up to 1280 conditions per place. [2024-01-29 14:11:30,294 INFO L140 encePairwiseOnDemand]: 95/99 looper letters, 48 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2024-01-29 14:11:30,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 88 transitions, 414 flow [2024-01-29 14:11:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 14:11:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 14:11:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2024-01-29 14:11:30,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8148148148148148 [2024-01-29 14:11:30,296 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 224 flow. Second operand 3 states and 242 transitions. [2024-01-29 14:11:30,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 88 transitions, 414 flow [2024-01-29 14:11:30,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 400 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-29 14:11:30,300 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 225 flow [2024-01-29 14:11:30,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2024-01-29 14:11:30,300 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -8 predicate places. [2024-01-29 14:11:30,301 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 225 flow [2024-01-29 14:11:30,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:30,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:30,301 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:30,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-29 14:11:30,301 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:30,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:30,302 INFO L85 PathProgramCache]: Analyzing trace with hash -63998545, now seen corresponding path program 1 times [2024-01-29 14:11:30,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:30,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805766028] [2024-01-29 14:11:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:30,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:30,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:30,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805766028] [2024-01-29 14:11:30,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805766028] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:11:30,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811377776] [2024-01-29 14:11:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:30,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:11:30,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:11:30,448 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:11:30,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-29 14:11:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:30,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-29 14:11:30,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:11:30,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-29 14:11:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:30,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:11:30,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:30,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811377776] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:11:30,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:11:30,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-01-29 14:11:30,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697162640] [2024-01-29 14:11:30,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:11:30,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-29 14:11:30,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:30,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-29 14:11:30,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-01-29 14:11:30,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 14:11:30,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 225 flow. Second operand has 11 states, 11 states have (on average 68.63636363636364) internal successors, (755), 11 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:30,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:30,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 14:11:30,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:31,816 INFO L124 PetriNetUnfolderBase]: 3059/9172 cut-off events. [2024-01-29 14:11:31,816 INFO L125 PetriNetUnfolderBase]: For 6198/6198 co-relation queries the response was YES. [2024-01-29 14:11:31,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19782 conditions, 9172 events. 3059/9172 cut-off events. For 6198/6198 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 78975 event pairs, 591 based on Foata normal form. 58/9023 useless extension candidates. Maximal degree in co-relation 19765. Up to 1119 conditions per place. [2024-01-29 14:11:31,864 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 186 selfloop transitions, 19 changer transitions 0/239 dead transitions. [2024-01-29 14:11:31,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 239 transitions, 1330 flow [2024-01-29 14:11:31,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-29 14:11:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-29 14:11:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 948 transitions. [2024-01-29 14:11:31,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2024-01-29 14:11:31,866 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 225 flow. Second operand 12 states and 948 transitions. [2024-01-29 14:11:31,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 239 transitions, 1330 flow [2024-01-29 14:11:31,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 239 transitions, 1308 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 14:11:31,876 INFO L231 Difference]: Finished difference. Result has 105 places, 89 transitions, 355 flow [2024-01-29 14:11:31,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=355, PETRI_PLACES=105, PETRI_TRANSITIONS=89} [2024-01-29 14:11:31,877 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 8 predicate places. [2024-01-29 14:11:31,877 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 89 transitions, 355 flow [2024-01-29 14:11:31,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 68.63636363636364) internal successors, (755), 11 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:31,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:31,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:31,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-29 14:11:32,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:11:32,090 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:32,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:32,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1874444233, now seen corresponding path program 1 times [2024-01-29 14:11:32,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:32,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865099909] [2024-01-29 14:11:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:32,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:32,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:32,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865099909] [2024-01-29 14:11:32,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865099909] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:11:32,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:11:32,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-29 14:11:32,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165290433] [2024-01-29 14:11:32,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:11:32,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-29 14:11:32,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:32,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-29 14:11:32,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-29 14:11:32,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 14:11:32,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 89 transitions, 355 flow. Second operand has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:32,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:32,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 14:11:32,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:33,663 INFO L124 PetriNetUnfolderBase]: 3093/9275 cut-off events. [2024-01-29 14:11:33,663 INFO L125 PetriNetUnfolderBase]: For 8651/8651 co-relation queries the response was YES. [2024-01-29 14:11:33,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20942 conditions, 9275 events. 3093/9275 cut-off events. For 8651/8651 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 81026 event pairs, 779 based on Foata normal form. 12/9085 useless extension candidates. Maximal degree in co-relation 20917. Up to 3525 conditions per place. [2024-01-29 14:11:33,729 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 105 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2024-01-29 14:11:33,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 152 transitions, 858 flow [2024-01-29 14:11:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-29 14:11:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-29 14:11:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 538 transitions. [2024-01-29 14:11:33,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7763347763347763 [2024-01-29 14:11:33,732 INFO L175 Difference]: Start difference. First operand has 105 places, 89 transitions, 355 flow. Second operand 7 states and 538 transitions. [2024-01-29 14:11:33,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 152 transitions, 858 flow [2024-01-29 14:11:33,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 152 transitions, 844 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-29 14:11:33,747 INFO L231 Difference]: Finished difference. Result has 115 places, 95 transitions, 433 flow [2024-01-29 14:11:33,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=433, PETRI_PLACES=115, PETRI_TRANSITIONS=95} [2024-01-29 14:11:33,747 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 18 predicate places. [2024-01-29 14:11:33,748 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 95 transitions, 433 flow [2024-01-29 14:11:33,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:33,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:33,748 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:33,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-29 14:11:33,748 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err14ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:33,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash -384356354, now seen corresponding path program 1 times [2024-01-29 14:11:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:33,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39096167] [2024-01-29 14:11:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-29 14:11:33,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:33,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39096167] [2024-01-29 14:11:33,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39096167] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:11:33,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:11:33,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-29 14:11:33,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118253093] [2024-01-29 14:11:33,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:11:33,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 14:11:33,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:33,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 14:11:33,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-29 14:11:33,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 99 [2024-01-29 14:11:33,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 95 transitions, 433 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:33,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:33,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 99 [2024-01-29 14:11:33,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:35,161 INFO L124 PetriNetUnfolderBase]: 4687/11938 cut-off events. [2024-01-29 14:11:35,162 INFO L125 PetriNetUnfolderBase]: For 12533/12545 co-relation queries the response was YES. [2024-01-29 14:11:35,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28619 conditions, 11938 events. 4687/11938 cut-off events. For 12533/12545 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 101456 event pairs, 1154 based on Foata normal form. 0/11756 useless extension candidates. Maximal degree in co-relation 28588. Up to 5501 conditions per place. [2024-01-29 14:11:35,235 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 134 selfloop transitions, 7 changer transitions 3/180 dead transitions. [2024-01-29 14:11:35,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 180 transitions, 1228 flow [2024-01-29 14:11:35,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-29 14:11:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-29 14:11:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 378 transitions. [2024-01-29 14:11:35,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7636363636363637 [2024-01-29 14:11:35,237 INFO L175 Difference]: Start difference. First operand has 115 places, 95 transitions, 433 flow. Second operand 5 states and 378 transitions. [2024-01-29 14:11:35,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 180 transitions, 1228 flow [2024-01-29 14:11:35,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 180 transitions, 1228 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-29 14:11:35,263 INFO L231 Difference]: Finished difference. Result has 119 places, 95 transitions, 457 flow [2024-01-29 14:11:35,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=457, PETRI_PLACES=119, PETRI_TRANSITIONS=95} [2024-01-29 14:11:35,264 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 22 predicate places. [2024-01-29 14:11:35,265 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 95 transitions, 457 flow [2024-01-29 14:11:35,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:35,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:35,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:35,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-29 14:11:35,266 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:35,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:35,266 INFO L85 PathProgramCache]: Analyzing trace with hash 585864016, now seen corresponding path program 1 times [2024-01-29 14:11:35,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:35,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92820345] [2024-01-29 14:11:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:35,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:36,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:36,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92820345] [2024-01-29 14:11:36,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92820345] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:11:36,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831763045] [2024-01-29 14:11:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:36,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:11:36,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:11:36,021 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:11:36,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-29 14:11:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:36,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-29 14:11:36,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:11:36,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-29 14:11:36,281 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 [2024-01-29 14:11:36,416 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 [2024-01-29 14:11:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:36,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:11:36,973 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 [2024-01-29 14:11:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:37,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831763045] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:11:37,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:11:37,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-01-29 14:11:37,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487392667] [2024-01-29 14:11:37,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:11:37,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-29 14:11:37,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-29 14:11:37,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-01-29 14:11:37,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 14:11:37,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 95 transitions, 457 flow. Second operand has 20 states, 20 states have (on average 67.75) internal successors, (1355), 20 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:37,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:37,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 14:11:37,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:42,356 INFO L124 PetriNetUnfolderBase]: 8555/25009 cut-off events. [2024-01-29 14:11:42,356 INFO L125 PetriNetUnfolderBase]: For 44392/44392 co-relation queries the response was YES. [2024-01-29 14:11:42,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63192 conditions, 25009 events. 8555/25009 cut-off events. For 44392/44392 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 230800 event pairs, 1213 based on Foata normal form. 36/24793 useless extension candidates. Maximal degree in co-relation 63159. Up to 2878 conditions per place. [2024-01-29 14:11:42,491 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 598 selfloop transitions, 118 changer transitions 31/781 dead transitions. [2024-01-29 14:11:42,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 781 transitions, 5676 flow [2024-01-29 14:11:42,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-01-29 14:11:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-01-29 14:11:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4206 transitions. [2024-01-29 14:11:42,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7586580086580087 [2024-01-29 14:11:42,499 INFO L175 Difference]: Start difference. First operand has 119 places, 95 transitions, 457 flow. Second operand 56 states and 4206 transitions. [2024-01-29 14:11:42,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 781 transitions, 5676 flow [2024-01-29 14:11:42,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 781 transitions, 5403 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-01-29 14:11:42,595 INFO L231 Difference]: Finished difference. Result has 177 places, 210 transitions, 1423 flow [2024-01-29 14:11:42,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=1423, PETRI_PLACES=177, PETRI_TRANSITIONS=210} [2024-01-29 14:11:42,596 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 80 predicate places. [2024-01-29 14:11:42,596 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 210 transitions, 1423 flow [2024-01-29 14:11:42,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 67.75) internal successors, (1355), 20 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:42,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:42,597 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:42,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-29 14:11:42,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:11:42,801 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err16ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:42,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:42,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1330494022, now seen corresponding path program 1 times [2024-01-29 14:11:42,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:42,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308567696] [2024-01-29 14:11:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:42,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-29 14:11:42,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:42,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308567696] [2024-01-29 14:11:42,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308567696] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 14:11:42,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 14:11:42,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-29 14:11:42,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995655196] [2024-01-29 14:11:42,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 14:11:42,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 14:11:42,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 14:11:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-29 14:11:42,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 99 [2024-01-29 14:11:42,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 210 transitions, 1423 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:42,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:42,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 99 [2024-01-29 14:11:42,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:46,705 INFO L124 PetriNetUnfolderBase]: 11005/26672 cut-off events. [2024-01-29 14:11:46,705 INFO L125 PetriNetUnfolderBase]: For 44619/44663 co-relation queries the response was YES. [2024-01-29 14:11:46,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72369 conditions, 26672 events. 11005/26672 cut-off events. For 44619/44663 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 230323 event pairs, 3004 based on Foata normal form. 0/26318 useless extension candidates. Maximal degree in co-relation 72330. Up to 12894 conditions per place. [2024-01-29 14:11:46,902 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 221 selfloop transitions, 7 changer transitions 2/293 dead transitions. [2024-01-29 14:11:46,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 293 transitions, 2428 flow [2024-01-29 14:11:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-29 14:11:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-29 14:11:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 369 transitions. [2024-01-29 14:11:46,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7454545454545455 [2024-01-29 14:11:46,904 INFO L175 Difference]: Start difference. First operand has 177 places, 210 transitions, 1423 flow. Second operand 5 states and 369 transitions. [2024-01-29 14:11:46,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 293 transitions, 2428 flow [2024-01-29 14:11:47,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 293 transitions, 2198 flow, removed 111 selfloop flow, removed 4 redundant places. [2024-01-29 14:11:47,002 INFO L231 Difference]: Finished difference. Result has 177 places, 210 transitions, 1257 flow [2024-01-29 14:11:47,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1257, PETRI_PLACES=177, PETRI_TRANSITIONS=210} [2024-01-29 14:11:47,003 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 80 predicate places. [2024-01-29 14:11:47,003 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 210 transitions, 1257 flow [2024-01-29 14:11:47,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:47,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:47,004 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:47,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-29 14:11:47,004 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:47,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:47,004 INFO L85 PathProgramCache]: Analyzing trace with hash 226924999, now seen corresponding path program 1 times [2024-01-29 14:11:47,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:47,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607842524] [2024-01-29 14:11:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:47,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:48,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:11:48,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607842524] [2024-01-29 14:11:48,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607842524] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:11:48,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946216442] [2024-01-29 14:11:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:48,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:11:48,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:11:48,009 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:11:48,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-29 14:11:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:11:48,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-29 14:11:48,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:11:48,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-29 14:11:48,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2024-01-29 14:11:48,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-01-29 14:11:48,378 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 [2024-01-29 14:11:49,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-29 14:11:49,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 57 [2024-01-29 14:11:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:49,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:11:50,051 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 110 treesize of output 104 [2024-01-29 14:11:50,075 INFO L349 Elim1Store]: treesize reduction 43, result has 48.2 percent of original size [2024-01-29 14:11:50,076 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 104 treesize of output 136 [2024-01-29 14:11:50,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-29 14:11:50,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 90 treesize of output 84 [2024-01-29 14:11:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:11:50,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946216442] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:11:50,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:11:50,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2024-01-29 14:11:50,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001891190] [2024-01-29 14:11:50,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:11:50,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-29 14:11:50,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:11:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-29 14:11:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2024-01-29 14:11:50,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 14:11:50,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 210 transitions, 1257 flow. Second operand has 26 states, 26 states have (on average 67.57692307692308) internal successors, (1757), 26 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:50,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:11:50,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 14:11:50,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:11:58,909 INFO L124 PetriNetUnfolderBase]: 14617/42391 cut-off events. [2024-01-29 14:11:58,909 INFO L125 PetriNetUnfolderBase]: For 85294/85294 co-relation queries the response was YES. [2024-01-29 14:11:59,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111388 conditions, 42391 events. 14617/42391 cut-off events. For 85294/85294 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 443398 event pairs, 2001 based on Foata normal form. 266/42300 useless extension candidates. Maximal degree in co-relation 111350. Up to 4920 conditions per place. [2024-01-29 14:11:59,309 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 593 selfloop transitions, 237 changer transitions 71/935 dead transitions. [2024-01-29 14:11:59,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 935 transitions, 6899 flow [2024-01-29 14:11:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-01-29 14:11:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-01-29 14:11:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4023 transitions. [2024-01-29 14:11:59,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7667238421955404 [2024-01-29 14:11:59,324 INFO L175 Difference]: Start difference. First operand has 177 places, 210 transitions, 1257 flow. Second operand 53 states and 4023 transitions. [2024-01-29 14:11:59,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 935 transitions, 6899 flow [2024-01-29 14:11:59,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 935 transitions, 6715 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-01-29 14:11:59,629 INFO L231 Difference]: Finished difference. Result has 242 places, 349 transitions, 2794 flow [2024-01-29 14:11:59,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=2794, PETRI_PLACES=242, PETRI_TRANSITIONS=349} [2024-01-29 14:11:59,630 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 145 predicate places. [2024-01-29 14:11:59,630 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 349 transitions, 2794 flow [2024-01-29 14:11:59,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 67.57692307692308) internal successors, (1757), 26 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:11:59,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:11:59,631 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:11:59,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-29 14:11:59,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-29 14:11:59,832 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:11:59,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:11:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2018735647, now seen corresponding path program 1 times [2024-01-29 14:11:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:11:59,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888850330] [2024-01-29 14:11:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:11:59,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:11:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:12:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-29 14:12:00,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:12:00,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888850330] [2024-01-29 14:12:00,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888850330] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:12:00,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066567927] [2024-01-29 14:12:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:12:00,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:12:00,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:12:00,039 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) [2024-01-29 14:12:00,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-29 14:12:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:12:00,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-29 14:12:00,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:12:00,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-29 14:12:00,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-29 14:12:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:12:00,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:12:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-01-29 14:12:00,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066567927] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:12:00,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:12:00,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 16 [2024-01-29 14:12:00,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149950147] [2024-01-29 14:12:00,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:12:00,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-29 14:12:00,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:12:00,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-29 14:12:00,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-01-29 14:12:00,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 14:12:00,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 349 transitions, 2794 flow. Second operand has 16 states, 16 states have (on average 69.625) internal successors, (1114), 16 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:12:00,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:12:00,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 14:12:00,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 14:12:09,874 INFO L124 PetriNetUnfolderBase]: 17033/49768 cut-off events. [2024-01-29 14:12:09,874 INFO L125 PetriNetUnfolderBase]: For 112181/112181 co-relation queries the response was YES. [2024-01-29 14:12:10,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137315 conditions, 49768 events. 17033/49768 cut-off events. For 112181/112181 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 528649 event pairs, 2581 based on Foata normal form. 172/49519 useless extension candidates. Maximal degree in co-relation 137257. Up to 5736 conditions per place. [2024-01-29 14:12:10,601 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 489 selfloop transitions, 163 changer transitions 23/709 dead transitions. [2024-01-29 14:12:10,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 709 transitions, 6312 flow [2024-01-29 14:12:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-29 14:12:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-29 14:12:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1877 transitions. [2024-01-29 14:12:10,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.789983164983165 [2024-01-29 14:12:10,604 INFO L175 Difference]: Start difference. First operand has 242 places, 349 transitions, 2794 flow. Second operand 24 states and 1877 transitions. [2024-01-29 14:12:10,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 709 transitions, 6312 flow [2024-01-29 14:12:11,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 709 transitions, 6264 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-01-29 14:12:11,331 INFO L231 Difference]: Finished difference. Result has 274 places, 389 transitions, 3668 flow [2024-01-29 14:12:11,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3668, PETRI_PLACES=274, PETRI_TRANSITIONS=389} [2024-01-29 14:12:11,332 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 177 predicate places. [2024-01-29 14:12:11,332 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 389 transitions, 3668 flow [2024-01-29 14:12:11,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.625) internal successors, (1114), 16 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:12:11,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 14:12:11,332 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 14:12:11,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-29 14:12:11,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-29 14:12:11,534 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-29 14:12:11,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 14:12:11,535 INFO L85 PathProgramCache]: Analyzing trace with hash -708972900, now seen corresponding path program 2 times [2024-01-29 14:12:11,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 14:12:11,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337181325] [2024-01-29 14:12:11,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 14:12:11,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 14:12:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 14:12:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:12:11,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 14:12:11,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337181325] [2024-01-29 14:12:11,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337181325] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 14:12:11,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544857264] [2024-01-29 14:12:11,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-29 14:12:11,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 14:12:11,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 14:12:11,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-29 14:12:11,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-29 14:12:12,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-29 14:12:12,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 14:12:12,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-29 14:12:12,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 14:12:12,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-29 14:12:12,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-29 14:12:12,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-29 14:12:12,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-29 14:12:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:12:12,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 14:12:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 14:12:12,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544857264] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 14:12:12,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 14:12:12,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2024-01-29 14:12:12,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217480129] [2024-01-29 14:12:12,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 14:12:12,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-29 14:12:12,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 14:12:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-29 14:12:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2024-01-29 14:12:12,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-29 14:12:12,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 389 transitions, 3668 flow. Second operand has 20 states, 20 states have (on average 69.3) internal successors, (1386), 20 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 14:12:12,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 14:12:12,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-29 14:12:12,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand