./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --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/popl20-more-nonblocking-counter-alt2.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fced0e87 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/weaver/popl20-more-nonblocking-counter-alt2.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-more-nonblocking-counter-alt2.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.extract-columns-fced0e8-m [2024-01-31 16:11:03,500 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:11:03,552 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:11:03,556 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:11:03,556 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:11:03,604 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:11:03,605 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:11:03,605 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:11:03,605 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:11:03,608 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:11:03,609 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:11:03,609 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:11:03,610 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:11:03,610 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:11:03,611 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:11:03,611 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:11:03,611 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:11:03,611 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:11:03,611 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:11:03,612 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:11:03,613 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:11:03,613 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:11:03,613 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:11:03,613 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:11:03,614 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:11:03,614 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:11:03,614 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:11:03,614 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:11:03,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:11:03,615 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:11:03,616 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:11:03,616 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:11:03,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:11:03,616 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:11:03,616 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:11:03,617 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:11:03,617 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:11:03,617 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:11:03,617 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:11:03,617 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:11:03,617 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:11:03,618 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:11:03,618 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:11:03,618 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:11:03,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:11:03,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:11:03,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:11:03,812 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:11:03,814 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:11:03,814 INFO L431 ainManager$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/popl20-more-nonblocking-counter-alt2.wvr.yml/witness.yml [2024-01-31 16:11:03,928 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:11:03,928 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:11:03,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-01-31 16:11:04,907 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:11:05,072 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:11:05,073 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-01-31 16:11:05,078 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9db7ce03/8daeced0829e4491ba259591f8459358/FLAG67dfd0747 [2024-01-31 16:11:05,091 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9db7ce03/8daeced0829e4491ba259591f8459358 [2024-01-31 16:11:05,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:11:05,094 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:11:05,097 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:11:05,098 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:11:05,102 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:11:05,102 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:11:03" (1/2) ... [2024-01-31 16:11:05,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f562123 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:05, skipping insertion in model container [2024-01-31 16:11:05,103 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:11:03" (1/2) ... [2024-01-31 16:11:05,104 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f06a0e2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:05, skipping insertion in model container [2024-01-31 16:11:05,104 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:11:05" (2/2) ... [2024-01-31 16:11:05,105 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f562123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05, skipping insertion in model container [2024-01-31 16:11:05,105 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:11:05" (2/2) ... [2024-01-31 16:11:05,106 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:11:05,125 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:11:05,126 INFO L98 nessWitnessExtractor]: Location invariant before [L43-L43] ((unsigned long )_argptr == 0UL) && ((((((((((((i == 11U || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (12U <= i && i <= 4294967294U)) [2024-01-31 16:11:05,127 INFO L98 nessWitnessExtractor]: Loop invariant at [L52-L52] (unsigned long )_argptr == 0UL [2024-01-31 16:11:05,127 INFO L98 nessWitnessExtractor]: Location invariant before [L72-L72] counter == 0U [2024-01-31 16:11:05,127 INFO L98 nessWitnessExtractor]: Location invariant before [L42-L42] ((unsigned long )_argptr == 0UL) && ((((((((((((i == 11U || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (12U <= i && i <= 4294967294U)) [2024-01-31 16:11:05,127 INFO L98 nessWitnessExtractor]: Location invariant before [L55-L55] (((1U <= counter) && ((unsigned long )_argptr == 0UL)) && (counter != 0U)) && ((((((((((((i <= 7U || i <= 6U) || i <= 5U) || i <= 4U) || (i <= 3U && i <= 65535U)) || i <= 4294967294U) || (i <= 2U && i <= 255U)) || i <= 11U) || (i <= 1U && (i == 0U || i == 1U))) || i <= 10U) || (0U == i && i == 0U)) || i <= 9U) || i <= 8U) [2024-01-31 16:11:05,127 INFO L98 nessWitnessExtractor]: Location invariant before [L61-L61] (unsigned long )_argptr == 0UL [2024-01-31 16:11:05,127 INFO L98 nessWitnessExtractor]: Location invariant after [L51-L51] (unsigned long )_argptr == 0UL [2024-01-31 16:11:05,127 INFO L98 nessWitnessExtractor]: Location invariant before [L68-L68] ((((((0LL - (long long )M) + (long long )counter >= 0LL) && ((long long )M + (long long )counter >= 0LL)) && ((0LL - (long long )M) - (long long )counter >= 0LL)) && ((long long )M - (long long )counter >= 0LL)) && (M == 0U)) && (counter == 0U) [2024-01-31 16:11:05,128 INFO L98 nessWitnessExtractor]: Location invariant before [L54-L54] ((unsigned long )_argptr == 0UL) && ((((((((((((i <= 8U || i <= 7U) || i <= 6U) || i <= 5U) || i <= 4U) || (i <= 3U && i <= 65535U)) || i <= 4294967294U) || (i <= 2U && i <= 255U)) || i <= 11U) || (i <= 1U && (i == 0U || i == 1U))) || i <= 10U) || (0U == i && i == 0U)) || i <= 9U) [2024-01-31 16:11:05,128 INFO L98 nessWitnessExtractor]: Location invariant before [L56-L56] ((unsigned long )_argptr == 0UL) && ((((((((((((i <= 7U || i <= 6U) || i <= 5U) || i <= 4U) || (i <= 3U && i <= 65535U)) || i <= 4294967294U) || (i <= 2U && i <= 255U)) || i <= 11U) || (i <= 1U && (i == 0U || i == 1U))) || i <= 10U) || (0U == i && i == 0U)) || i <= 9U) || i <= 8U) [2024-01-31 16:11:05,128 INFO L98 nessWitnessExtractor]: Location invariant before [L44-L44] ((unsigned long )_argptr == 0UL) && ((((((((((((i == 11U || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (12U <= i && i <= 4294967294U)) [2024-01-31 16:11:05,128 INFO L98 nessWitnessExtractor]: Location invariant before [L58-L58] (unsigned long )_argptr == 0UL [2024-01-31 16:11:05,128 INFO L98 nessWitnessExtractor]: Location invariant before [L69-L69] counter == 0U [2024-01-31 16:11:05,128 INFO L98 nessWitnessExtractor]: Location invariant before [L51-L51] (unsigned long )_argptr == 0UL [2024-01-31 16:11:05,128 INFO L98 nessWitnessExtractor]: Loop invariant at [L41-L41] ((unsigned long )_argptr == 0UL) && ((((((((((((i == 11U || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || 12U <= i) [2024-01-31 16:11:05,129 INFO L98 nessWitnessExtractor]: Location invariant before [L47-L47] (unsigned long )_argptr == 0UL [2024-01-31 16:11:05,129 INFO L98 nessWitnessExtractor]: Location invariant before [L67-L67] (((((((0LL - (long long )M) + (long long )counter >= 0LL) && ((long long )M + (long long )counter >= 0LL)) && ((0LL - (long long )M) - (long long )counter >= 0LL)) && ((long long )M - (long long )counter >= 0LL)) && (M == 0U)) && (counter == 0U)) && (C == 0U) [2024-01-31 16:11:05,129 INFO L98 nessWitnessExtractor]: Location invariant before [L53-L53] ((unsigned long )_argptr == 0UL) && ((((((((((((i <= 8U || i <= 7U) || i <= 6U) || i <= 5U) || i <= 4U) || (i <= 3U && i <= 65535U)) || i <= 4294967294U) || (i <= 2U && i <= 255U)) || i <= 11U) || (i <= 1U && (i == 0U || i == 1U))) || i <= 10U) || (0U == i && i == 0U)) || i <= 9U) [2024-01-31 16:11:05,146 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:11:05,275 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-01-31 16:11:05,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:11:05,285 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:11:05,406 WARN L424 MainDispatcher]: Unable to annotate unsigned int with a witness entry [2024-01-31 16:11:05,406 WARN L424 MainDispatcher]: Unable to annotate i = 0 with a witness entry 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 [2024-01-31 16:11:05,429 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-01-31 16:11:05,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:11:05,440 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:11:05,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05 WrapperNode [2024-01-31 16:11:05,455 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:11:05,456 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:11:05,456 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:11:05,456 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:11:05,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (1/1) ... [2024-01-31 16:11:05,468 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (1/1) ... [2024-01-31 16:11:05,483 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2024-01-31 16:11:05,483 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:11:05,484 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:11:05,484 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:11:05,484 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:11:05,497 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (1/1) ... [2024-01-31 16:11:05,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (1/1) ... [2024-01-31 16:11:05,500 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (1/1) ... [2024-01-31 16:11:05,510 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-31 16:11:05,511 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (1/1) ... [2024-01-31 16:11:05,511 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (1/1) ... [2024-01-31 16:11:05,517 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (1/1) ... [2024-01-31 16:11:05,520 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (1/1) ... [2024-01-31 16:11:05,521 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (1/1) ... [2024-01-31 16:11:05,522 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (1/1) ... [2024-01-31 16:11:05,525 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:11:05,525 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:11:05,526 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:11:05,526 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:11:05,526 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (1/1) ... [2024-01-31 16:11:05,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:11:05,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:05,564 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) [2024-01-31 16:11:05,573 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 [2024-01-31 16:11:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:11:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:11:05,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:11:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:11:05,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:11:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:11:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:11:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:11:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:11:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:11:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:11:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:11:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 16:11:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 16:11:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:11:05,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:11:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:11:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:11:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:11:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:11:05,606 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:11:05,672 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:11:05,674 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:11:05,965 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:11:05,965 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:11:06,073 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:11:06,073 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:11:06,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:11:06 BoogieIcfgContainer [2024-01-31 16:11:06,075 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:11:06,078 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:11:06,078 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:11:06,082 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:11:06,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:11:03" (1/4) ... [2024-01-31 16:11:06,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366e374a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:11:06, skipping insertion in model container [2024-01-31 16:11:06,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:11:05" (2/4) ... [2024-01-31 16:11:06,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366e374a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:11:06, skipping insertion in model container [2024-01-31 16:11:06,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:05" (3/4) ... [2024-01-31 16:11:06,096 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366e374a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:11:06, skipping insertion in model container [2024-01-31 16:11:06,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:11:06" (4/4) ... [2024-01-31 16:11:06,097 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-01-31 16:11:06,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:11:06,112 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2024-01-31 16:11:06,112 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:11:06,186 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:11:06,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 49 transitions, 112 flow [2024-01-31 16:11:06,250 INFO L124 PetriNetUnfolderBase]: 3/47 cut-off events. [2024-01-31 16:11:06,250 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:11:06,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 47 events. 3/47 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 100 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-01-31 16:11:06,253 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 49 transitions, 112 flow [2024-01-31 16:11:06,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 46 transitions, 104 flow [2024-01-31 16:11:06,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:11:06,276 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;@78233983, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:11:06,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-01-31 16:11:06,278 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:11:06,279 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:11:06,279 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:11:06,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:06,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:11:06,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:11:06,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:06,287 INFO L85 PathProgramCache]: Analyzing trace with hash 9884, now seen corresponding path program 1 times [2024-01-31 16:11:06,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:06,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011572288] [2024-01-31 16:11:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:06,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:06,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:06,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011572288] [2024-01-31 16:11:06,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011572288] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:06,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:06,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:11:06,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458222143] [2024-01-31 16:11:06,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:06,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:06,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:06,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:06,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-01-31 16:11:06,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-01-31 16:11:06,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:06,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-01-31 16:11:06,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:06,788 INFO L124 PetriNetUnfolderBase]: 130/318 cut-off events. [2024-01-31 16:11:06,789 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-01-31 16:11:06,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 318 events. 130/318 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1587 event pairs, 102 based on Foata normal form. 16/255 useless extension candidates. Maximal degree in co-relation 503. Up to 234 conditions per place. [2024-01-31 16:11:06,794 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 26 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-01-31 16:11:06,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 148 flow [2024-01-31 16:11:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-01-31 16:11:06,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-01-31 16:11:06,807 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 104 flow. Second operand 3 states and 76 transitions. [2024-01-31 16:11:06,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 148 flow [2024-01-31 16:11:06,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 140 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:11:06,813 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 88 flow [2024-01-31 16:11:06,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2024-01-31 16:11:06,817 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2024-01-31 16:11:06,818 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 88 flow [2024-01-31 16:11:06,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-01-31 16:11:06,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:06,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-01-31 16:11:06,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:11:06,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:11:06,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 306702, now seen corresponding path program 1 times [2024-01-31 16:11:06,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:06,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675741660] [2024-01-31 16:11:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:06,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:06,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:06,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675741660] [2024-01-31 16:11:06,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675741660] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:06,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:06,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:11:06,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492655320] [2024-01-31 16:11:06,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:06,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:06,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:06,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:06,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:06,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-01-31 16:11:06,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-01-31 16:11:06,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:06,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-01-31 16:11:06,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:07,075 INFO L124 PetriNetUnfolderBase]: 130/317 cut-off events. [2024-01-31 16:11:07,075 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:11:07,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 317 events. 130/317 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1596 event pairs, 102 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 554. Up to 232 conditions per place. [2024-01-31 16:11:07,080 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 25 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-01-31 16:11:07,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 140 flow [2024-01-31 16:11:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:07,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-01-31 16:11:07,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-01-31 16:11:07,084 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 88 flow. Second operand 3 states and 73 transitions. [2024-01-31 16:11:07,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 140 flow [2024-01-31 16:11:07,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:07,086 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 86 flow [2024-01-31 16:11:07,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-01-31 16:11:07,087 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2024-01-31 16:11:07,088 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 86 flow [2024-01-31 16:11:07,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-01-31 16:11:07,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:07,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-01-31 16:11:07,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:11:07,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:11:07,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:07,089 INFO L85 PathProgramCache]: Analyzing trace with hash 9508046, now seen corresponding path program 1 times [2024-01-31 16:11:07,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:07,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039850154] [2024-01-31 16:11:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:07,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:07,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:07,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039850154] [2024-01-31 16:11:07,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039850154] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:07,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:07,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:11:07,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544151866] [2024-01-31 16:11:07,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:07,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:07,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:07,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:07,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-01-31 16:11:07,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2024-01-31 16:11:07,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:07,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-01-31 16:11:07,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:07,244 INFO L124 PetriNetUnfolderBase]: 157/386 cut-off events. [2024-01-31 16:11:07,245 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:11:07,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 386 events. 157/386 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2125 event pairs, 57 based on Foata normal form. 1/299 useless extension candidates. Maximal degree in co-relation 672. Up to 149 conditions per place. [2024-01-31 16:11:07,247 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 34 selfloop transitions, 2 changer transitions 1/51 dead transitions. [2024-01-31 16:11:07,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 187 flow [2024-01-31 16:11:07,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:07,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-01-31 16:11:07,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2024-01-31 16:11:07,249 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 86 flow. Second operand 3 states and 94 transitions. [2024-01-31 16:11:07,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 187 flow [2024-01-31 16:11:07,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 183 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:07,250 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 90 flow [2024-01-31 16:11:07,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-01-31 16:11:07,251 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -9 predicate places. [2024-01-31 16:11:07,251 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 90 flow [2024-01-31 16:11:07,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2024-01-31 16:11:07,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:07,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:07,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:11:07,252 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:11:07,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1976662191, now seen corresponding path program 1 times [2024-01-31 16:11:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:07,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274188494] [2024-01-31 16:11:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:07,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:07,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:07,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274188494] [2024-01-31 16:11:07,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274188494] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:07,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:07,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:07,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139342342] [2024-01-31 16:11:07,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:07,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:07,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:07,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:07,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:07,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-01-31 16:11:07,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2024-01-31 16:11:07,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:07,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-01-31 16:11:07,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:07,571 INFO L124 PetriNetUnfolderBase]: 171/380 cut-off events. [2024-01-31 16:11:07,572 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-01-31 16:11:07,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 380 events. 171/380 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1939 event pairs, 47 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 363. Up to 285 conditions per place. [2024-01-31 16:11:07,574 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 30 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-01-31 16:11:07,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 165 flow [2024-01-31 16:11:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-01-31 16:11:07,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2024-01-31 16:11:07,578 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 90 flow. Second operand 4 states and 101 transitions. [2024-01-31 16:11:07,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 165 flow [2024-01-31 16:11:07,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:11:07,581 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 88 flow [2024-01-31 16:11:07,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-01-31 16:11:07,582 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -9 predicate places. [2024-01-31 16:11:07,582 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 88 flow [2024-01-31 16:11:07,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2024-01-31 16:11:07,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:07,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:07,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:11:07,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:11:07,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:07,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1196830898, now seen corresponding path program 1 times [2024-01-31 16:11:07,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:07,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933066001] [2024-01-31 16:11:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:07,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:07,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:07,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933066001] [2024-01-31 16:11:07,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933066001] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:07,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:07,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:07,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176439612] [2024-01-31 16:11:07,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:07,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:07,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:07,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-01-31 16:11:07,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2024-01-31 16:11:07,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:07,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-01-31 16:11:07,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:07,873 INFO L124 PetriNetUnfolderBase]: 199/382 cut-off events. [2024-01-31 16:11:07,874 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-01-31 16:11:07,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 382 events. 199/382 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1733 event pairs, 15 based on Foata normal form. 20/332 useless extension candidates. Maximal degree in co-relation 644. Up to 155 conditions per place. [2024-01-31 16:11:07,877 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 38 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-01-31 16:11:07,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 202 flow [2024-01-31 16:11:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-01-31 16:11:07,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2024-01-31 16:11:07,879 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 88 flow. Second operand 4 states and 99 transitions. [2024-01-31 16:11:07,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 202 flow [2024-01-31 16:11:07,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 199 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:07,881 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 104 flow [2024-01-31 16:11:07,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-01-31 16:11:07,882 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2024-01-31 16:11:07,883 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 104 flow [2024-01-31 16:11:07,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2024-01-31 16:11:07,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:07,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:07,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:11:07,883 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:11:07,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:07,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1195578073, now seen corresponding path program 1 times [2024-01-31 16:11:07,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:07,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234967588] [2024-01-31 16:11:07,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:07,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:07,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234967588] [2024-01-31 16:11:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234967588] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:07,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:07,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:07,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277350679] [2024-01-31 16:11:07,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:07,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:07,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:07,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:07,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:07,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-01-31 16:11:07,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2024-01-31 16:11:07,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:07,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-01-31 16:11:07,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:08,062 INFO L124 PetriNetUnfolderBase]: 129/341 cut-off events. [2024-01-31 16:11:08,063 INFO L125 PetriNetUnfolderBase]: For 119/134 co-relation queries the response was YES. [2024-01-31 16:11:08,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 341 events. 129/341 cut-off events. For 119/134 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1742 event pairs, 7 based on Foata normal form. 27/305 useless extension candidates. Maximal degree in co-relation 655. Up to 167 conditions per place. [2024-01-31 16:11:08,064 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 39 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-01-31 16:11:08,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 251 flow [2024-01-31 16:11:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-01-31 16:11:08,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561224489795918 [2024-01-31 16:11:08,066 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 104 flow. Second operand 4 states and 109 transitions. [2024-01-31 16:11:08,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 251 flow [2024-01-31 16:11:08,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:11:08,068 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 103 flow [2024-01-31 16:11:08,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2024-01-31 16:11:08,069 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2024-01-31 16:11:08,069 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 103 flow [2024-01-31 16:11:08,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2024-01-31 16:11:08,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:08,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:08,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:11:08,070 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:11:08,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:08,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2100696515, now seen corresponding path program 1 times [2024-01-31 16:11:08,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:08,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576238105] [2024-01-31 16:11:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:08,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:08,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:08,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576238105] [2024-01-31 16:11:08,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576238105] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:08,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:08,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:08,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494298647] [2024-01-31 16:11:08,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:08,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:08,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:08,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:08,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-01-31 16:11:08,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2024-01-31 16:11:08,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:08,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-01-31 16:11:08,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:08,208 INFO L124 PetriNetUnfolderBase]: 213/413 cut-off events. [2024-01-31 16:11:08,208 INFO L125 PetriNetUnfolderBase]: For 181/203 co-relation queries the response was YES. [2024-01-31 16:11:08,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 413 events. 213/413 cut-off events. For 181/203 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1764 event pairs, 47 based on Foata normal form. 8/418 useless extension candidates. Maximal degree in co-relation 955. Up to 167 conditions per place. [2024-01-31 16:11:08,210 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 41 selfloop transitions, 3 changer transitions 3/53 dead transitions. [2024-01-31 16:11:08,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 269 flow [2024-01-31 16:11:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-01-31 16:11:08,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2024-01-31 16:11:08,212 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 103 flow. Second operand 4 states and 99 transitions. [2024-01-31 16:11:08,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 269 flow [2024-01-31 16:11:08,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:08,214 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 101 flow [2024-01-31 16:11:08,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2024-01-31 16:11:08,214 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2024-01-31 16:11:08,214 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 101 flow [2024-01-31 16:11:08,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2024-01-31 16:11:08,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:08,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:08,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:11:08,215 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:11:08,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:08,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1648630450, now seen corresponding path program 1 times [2024-01-31 16:11:08,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:08,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245578090] [2024-01-31 16:11:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:08,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:08,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:08,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245578090] [2024-01-31 16:11:08,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245578090] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:08,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:08,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:11:08,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282391746] [2024-01-31 16:11:08,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:08,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:08,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:08,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:08,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-01-31 16:11:08,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2024-01-31 16:11:08,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:08,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-01-31 16:11:08,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:08,388 INFO L124 PetriNetUnfolderBase]: 199/414 cut-off events. [2024-01-31 16:11:08,388 INFO L125 PetriNetUnfolderBase]: For 172/172 co-relation queries the response was YES. [2024-01-31 16:11:08,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 414 events. 199/414 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1802 event pairs, 117 based on Foata normal form. 18/425 useless extension candidates. Maximal degree in co-relation 1032. Up to 257 conditions per place. [2024-01-31 16:11:08,390 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 36 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2024-01-31 16:11:08,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 228 flow [2024-01-31 16:11:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-01-31 16:11:08,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-01-31 16:11:08,392 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 101 flow. Second operand 4 states and 104 transitions. [2024-01-31 16:11:08,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 228 flow [2024-01-31 16:11:08,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 211 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-01-31 16:11:08,396 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 105 flow [2024-01-31 16:11:08,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2024-01-31 16:11:08,397 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2024-01-31 16:11:08,398 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 105 flow [2024-01-31 16:11:08,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2024-01-31 16:11:08,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:08,398 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, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:08,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:11:08,414 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:11:08,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:08,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1596074356, now seen corresponding path program 1 times [2024-01-31 16:11:08,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:08,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041989890] [2024-01-31 16:11:08,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:08,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:11:08,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:08,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041989890] [2024-01-31 16:11:08,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041989890] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:08,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121506766] [2024-01-31 16:11:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:08,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:08,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:08,573 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) [2024-01-31 16:11:08,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:11:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:08,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 16:11:08,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:11:08,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:11:08,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121506766] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:08,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:08,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-01-31 16:11:08,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501671576] [2024-01-31 16:11:08,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:08,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:11:08,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:11:08,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-01-31 16:11:09,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-01-31 16:11:09,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 105 flow. Second operand has 9 states, 9 states have (on average 17.444444444444443) internal successors, (157), 9 states have internal predecessors, (157), 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) [2024-01-31 16:11:09,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:09,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-01-31 16:11:09,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:09,199 INFO L124 PetriNetUnfolderBase]: 335/628 cut-off events. [2024-01-31 16:11:09,199 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2024-01-31 16:11:09,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1580 conditions, 628 events. 335/628 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2709 event pairs, 36 based on Foata normal form. 18/641 useless extension candidates. Maximal degree in co-relation 1555. Up to 196 conditions per place. [2024-01-31 16:11:09,203 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-01-31 16:11:09,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 331 flow [2024-01-31 16:11:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:11:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:11:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-01-31 16:11:09,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43731778425655976 [2024-01-31 16:11:09,205 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 105 flow. Second operand 7 states and 150 transitions. [2024-01-31 16:11:09,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 331 flow [2024-01-31 16:11:09,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 65 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:09,207 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 175 flow [2024-01-31 16:11:09,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=175, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2024-01-31 16:11:09,209 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2024-01-31 16:11:09,209 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 175 flow [2024-01-31 16:11:09,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.444444444444443) internal successors, (157), 9 states have internal predecessors, (157), 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) [2024-01-31 16:11:09,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:09,209 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, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:09,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 16:11:09,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:09,422 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:11:09,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:09,422 INFO L85 PathProgramCache]: Analyzing trace with hash -612054784, now seen corresponding path program 2 times [2024-01-31 16:11:09,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:09,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696068950] [2024-01-31 16:11:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:09,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:09,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:09,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696068950] [2024-01-31 16:11:09,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696068950] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:09,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853331329] [2024-01-31 16:11:09,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:11:09,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:09,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:09,769 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) [2024-01-31 16:11:09,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:11:09,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:11:09,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:09,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 16:11:09,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:09,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:11:10,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853331329] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:10,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:11:10,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 12 [2024-01-31 16:11:10,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915650346] [2024-01-31 16:11:10,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:10,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:11:10,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:10,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:11:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:11:10,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-01-31 16:11:10,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2024-01-31 16:11:10,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:10,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-01-31 16:11:10,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:10,284 INFO L124 PetriNetUnfolderBase]: 589/1249 cut-off events. [2024-01-31 16:11:10,284 INFO L125 PetriNetUnfolderBase]: For 1731/1731 co-relation queries the response was YES. [2024-01-31 16:11:10,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3566 conditions, 1249 events. 589/1249 cut-off events. For 1731/1731 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7160 event pairs, 73 based on Foata normal form. 1/1236 useless extension candidates. Maximal degree in co-relation 3536. Up to 241 conditions per place. [2024-01-31 16:11:10,291 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 75 selfloop transitions, 19 changer transitions 9/110 dead transitions. [2024-01-31 16:11:10,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 110 transitions, 669 flow [2024-01-31 16:11:10,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:11:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:11:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-01-31 16:11:10,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-01-31 16:11:10,293 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 175 flow. Second operand 6 states and 179 transitions. [2024-01-31 16:11:10,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 110 transitions, 669 flow [2024-01-31 16:11:10,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 110 transitions, 664 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:10,297 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 359 flow [2024-01-31 16:11:10,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-01-31 16:11:10,297 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-01-31 16:11:10,298 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 359 flow [2024-01-31 16:11:10,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2024-01-31 16:11:10,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:10,298 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-01-31 16:11:10,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:10,511 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,SelfDestructingSolverStorable9 [2024-01-31 16:11:10,511 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-01-31 16:11:10,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:10,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1273831098, now seen corresponding path program 3 times [2024-01-31 16:11:10,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:10,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741969198] [2024-01-31 16:11:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:10,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:10,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:10,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741969198] [2024-01-31 16:11:10,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741969198] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:10,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164305249] [2024-01-31 16:11:10,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:11:10,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:10,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:10,747 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) [2024-01-31 16:11:10,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:11:10,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:11:10,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:10,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:11:10,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:10,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:11,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164305249] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:11,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:11,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 7] total 16 [2024-01-31 16:11:11,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570047335] [2024-01-31 16:11:11,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:11,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:11:11,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:11,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:11:11,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:11:11,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-01-31 16:11:11,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 359 flow. Second operand has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 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) [2024-01-31 16:11:11,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:11,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-01-31 16:11:11,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:11,303 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-01-31 16:11:11,303 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:11:11,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 3 events. 0/3 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/4 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2024-01-31 16:11:11,303 INFO L140 encePairwiseOnDemand]: 47/49 looper letters, 0 selfloop transitions, 0 changer transitions 3/3 dead transitions. [2024-01-31 16:11:11,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 3 transitions, 19 flow [2024-01-31 16:11:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:11,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:11,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-01-31 16:11:11,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374149659863946 [2024-01-31 16:11:11,304 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 359 flow. Second operand 3 states and 52 transitions. [2024-01-31 16:11:11,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 3 transitions, 19 flow [2024-01-31 16:11:11,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 3 transitions, 15 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:11:11,305 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2024-01-31 16:11:11,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=9, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2024-01-31 16:11:11,305 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -32 predicate places. [2024-01-31 16:11:11,305 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2024-01-31 16:11:11,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 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) [2024-01-31 16:11:11,307 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 31 remaining) [2024-01-31 16:11:11,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 31 remaining) [2024-01-31 16:11:11,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 31 remaining) [2024-01-31 16:11:11,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 31 remaining) [2024-01-31 16:11:11,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 31 remaining) [2024-01-31 16:11:11,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 31 remaining) [2024-01-31 16:11:11,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 31 remaining) [2024-01-31 16:11:11,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 31 remaining) [2024-01-31 16:11:11,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 31 remaining) [2024-01-31 16:11:11,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 31 remaining) [2024-01-31 16:11:11,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (14 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 31 remaining) [2024-01-31 16:11:11,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 31 remaining) [2024-01-31 16:11:11,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 31 remaining) [2024-01-31 16:11:11,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 31 remaining) [2024-01-31 16:11:11,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 31 remaining) [2024-01-31 16:11:11,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 31 remaining) [2024-01-31 16:11:11,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 31 remaining) [2024-01-31 16:11:11,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 31 remaining) [2024-01-31 16:11:11,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:11,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:11,521 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:11,525 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-31 16:11:11,525 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-31 16:11:11,528 INFO L503 ceAbstractionStarter]: Automizer considered 16 witness invariants [2024-01-31 16:11:11,528 INFO L504 ceAbstractionStarter]: WitnessConsidered=16 [2024-01-31 16:11:11,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 04:11:11 BasicIcfg [2024-01-31 16:11:11,529 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-31 16:11:11,529 INFO L158 Benchmark]: Toolchain (without parser) took 6435.39ms. Allocated memory was 176.2MB in the beginning and 278.9MB in the end (delta: 102.8MB). Free memory was 104.5MB in the beginning and 222.2MB in the end (delta: -117.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 16:11:11,529 INFO L158 Benchmark]: Witness Parser took 0.13ms. Allocated memory is still 104.9MB. Free memory is still 72.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 16:11:11,530 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 176.2MB. Free memory is still 150.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 16:11:11,530 INFO L158 Benchmark]: CACSL2BoogieTranslator took 357.61ms. Allocated memory is still 176.2MB. Free memory was 104.2MB in the beginning and 145.0MB in the end (delta: -40.8MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. [2024-01-31 16:11:11,530 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.94ms. Allocated memory is still 176.2MB. Free memory was 145.0MB in the beginning and 143.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 16:11:11,530 INFO L158 Benchmark]: Boogie Preprocessor took 40.91ms. Allocated memory is still 176.2MB. Free memory was 143.4MB in the beginning and 140.8MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-01-31 16:11:11,530 INFO L158 Benchmark]: RCFGBuilder took 549.67ms. Allocated memory is still 176.2MB. Free memory was 140.8MB in the beginning and 87.9MB in the end (delta: 52.9MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. [2024-01-31 16:11:11,531 INFO L158 Benchmark]: TraceAbstraction took 5451.04ms. Allocated memory was 176.2MB in the beginning and 278.9MB in the end (delta: 102.8MB). Free memory was 87.4MB in the beginning and 222.2MB in the end (delta: -134.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 16:11:11,532 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.13ms. Allocated memory is still 104.9MB. Free memory is still 72.0MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 176.2MB. Free memory is still 150.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 357.61ms. Allocated memory is still 176.2MB. Free memory was 104.2MB in the beginning and 145.0MB in the end (delta: -40.8MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.94ms. Allocated memory is still 176.2MB. Free memory was 145.0MB in the beginning and 143.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 40.91ms. Allocated memory is still 176.2MB. Free memory was 143.4MB in the beginning and 140.8MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 549.67ms. Allocated memory is still 176.2MB. Free memory was 140.8MB in the beginning and 87.9MB in the end (delta: 52.9MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5451.04ms. Allocated memory was 176.2MB in the beginning and 278.9MB in the end (delta: 102.8MB). Free memory was 87.4MB in the beginning and 222.2MB in the end (delta: -134.9MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 42]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 47]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 43]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 44]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 52]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 61]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 53]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 54]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 55]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 56]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 58]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 67]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 68]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 69]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 72]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 78]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 76 locations, 31 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.3s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 465 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 368 mSDsluCounter, 69 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 30 mSDsCounter, 51 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1061 IncrementalHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 51 mSolverCounterUnsat, 39 mSDtfsCounter, 1061 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 229 GetRequests, 176 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=359occurred in iteration=10, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 263 NumberOfCodeBlocks, 263 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 340 ConstructedInterpolants, 0 QuantifiedInterpolants, 2395 SizeOfPredicates, 28 NumberOfNonLiveVariables, 515 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 17 InterpolantComputations, 9 PerfectInterpolantSequences, 24/43 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-31 16:11:11,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE