./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure3.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-figure3.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-figure3.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-figure3.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 16:10:41,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:10:41,737 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:10:41,740 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:10:41,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:10:41,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:10:41,754 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:10:41,754 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:10:41,755 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:10:41,756 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:10:41,756 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:10:41,756 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:10:41,757 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:10:41,758 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:10:41,759 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:10:41,759 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:10:41,760 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:10:41,762 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:10:41,762 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:10:41,762 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:10:41,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:10:41,764 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:10:41,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:10:41,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:10:41,764 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:10:41,764 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:10:41,765 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:10:41,765 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:10:41,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:10:41,766 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:10:41,766 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:10:41,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:10:41,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:10:41,767 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:10:41,767 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:10:41,767 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:10:41,767 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:10:41,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:10:41,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:10:41,768 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:10:41,768 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:10:41,769 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:10:41,769 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:10:41,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:10:42,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:10:42,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:10:42,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:10:42,028 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:10:42,029 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:10:42,029 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-01-31 16:10:42,955 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:10:43,127 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:10:43,130 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-01-31 16:10:43,139 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b94dd9ee/8d4c6a040cfb4fa5848d9b1c1274cca6/FLAG56ab34e44 [2024-01-31 16:10:43,149 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b94dd9ee/8d4c6a040cfb4fa5848d9b1c1274cca6 [2024-01-31 16:10:43,151 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:10:43,152 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:10:43,154 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-figure3.wvr.yml/witness.yml [2024-01-31 16:10:43,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:10:43,238 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:10:43,239 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:10:43,240 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:10:43,243 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:10:43,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:10:43" (1/2) ... [2024-01-31 16:10:43,246 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178b64e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:10:43, skipping insertion in model container [2024-01-31 16:10:43,246 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:10:43" (1/2) ... [2024-01-31 16:10:43,247 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@108961be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:10:43, skipping insertion in model container [2024-01-31 16:10:43,248 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:10:43" (2/2) ... [2024-01-31 16:10:43,248 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178b64e1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43, skipping insertion in model container [2024-01-31 16:10:43,248 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:10:43" (2/2) ... [2024-01-31 16:10:43,249 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:10:43,273 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:10:43,275 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 16:10:43,275 INFO L98 nessWitnessExtractor]: Location invariant before [L70-L70] counter == 0U [2024-01-31 16:10:43,275 INFO L98 nessWitnessExtractor]: Location invariant before [L65-L65] ((((((0LL - (long long )c) + (long long )counter >= 0LL) && ((long long )c + (long long )counter >= 0LL)) && ((0LL - (long long )c) - (long long )counter >= 0LL)) && ((long long )c - (long long )counter >= 0LL)) && (counter == 0U)) && (c == 0U) [2024-01-31 16:10:43,275 INFO L98 nessWitnessExtractor]: Location invariant before [L55-L55] ((unsigned long )_argptr == 0UL) && ((((((((((i == 9U || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (10U <= i && i <= 4294967294U)) [2024-01-31 16:10:43,276 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 16:10:43,276 INFO L98 nessWitnessExtractor]: Location invariant before [L64-L64] (((((((0LL - (long long )c) + (long long )counter >= 0LL) && ((long long )c + (long long )counter >= 0LL)) && ((0LL - (long long )c) - (long long )counter >= 0LL)) && ((long long )c - (long long )counter >= 0LL)) && (N == 0U)) && (counter == 0U)) && (c == 0U) [2024-01-31 16:10:43,276 INFO L98 nessWitnessExtractor]: Location invariant before [L67-L67] counter == 0U [2024-01-31 16:10:43,276 INFO L98 nessWitnessExtractor]: Location invariant before [L52-L52] ((unsigned long )_argptr == 0UL) && ((((((((((i == 9U || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (10U <= i && i <= 4294967294U)) [2024-01-31 16:10:43,277 INFO L98 nessWitnessExtractor]: Location invariant before [L58-L58] (unsigned long )_argptr == 0UL [2024-01-31 16:10:43,277 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 16:10:43,277 INFO L98 nessWitnessExtractor]: Loop invariant at [L51-L51] ((unsigned long )_argptr == 0UL) && ((((((((((i == 9U || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || 10U <= i) [2024-01-31 16:10:43,277 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 16:10:43,277 INFO L98 nessWitnessExtractor]: Location invariant before [L54-L54] ((unsigned long )_argptr == 0UL) && ((((((((((i == 9U || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (10U <= i && i <= 4294967294U)) [2024-01-31 16:10:43,277 INFO L98 nessWitnessExtractor]: Location invariant before [L47-L47] (unsigned long )_argptr == 0UL [2024-01-31 16:10:43,277 INFO L98 nessWitnessExtractor]: Location invariant before [L53-L53] ((unsigned long )_argptr == 0UL) && ((((((((((i == 9U || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (10U <= i && i <= 4294967294U)) [2024-01-31 16:10:43,293 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:10:43,438 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-figure3.wvr.c[2147,2160] [2024-01-31 16:10:43,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:10:43,468 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:10:43,553 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-figure3.wvr.c[2147,2160] [2024-01-31 16:10:43,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:10:43,565 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:10:43,566 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43 WrapperNode [2024-01-31 16:10:43,566 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:10:43,566 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:10:43,566 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:10:43,566 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:10:43,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (1/1) ... [2024-01-31 16:10:43,584 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (1/1) ... [2024-01-31 16:10:43,605 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 85 [2024-01-31 16:10:43,605 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:10:43,606 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:10:43,606 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:10:43,606 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:10:43,615 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (1/1) ... [2024-01-31 16:10:43,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (1/1) ... [2024-01-31 16:10:43,617 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (1/1) ... [2024-01-31 16:10:43,629 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 16:10:43,629 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (1/1) ... [2024-01-31 16:10:43,629 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (1/1) ... [2024-01-31 16:10:43,635 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (1/1) ... [2024-01-31 16:10:43,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (1/1) ... [2024-01-31 16:10:43,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (1/1) ... [2024-01-31 16:10:43,639 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (1/1) ... [2024-01-31 16:10:43,642 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:10:43,642 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:10:43,642 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:10:43,642 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:10:43,643 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (1/1) ... [2024-01-31 16:10:43,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:10:43,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:43,680 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 16:10:43,701 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 16:10:43,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:10:43,715 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:10:43,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:10:43,716 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:10:43,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:10:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:10:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:10:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:10:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:10:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:10:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:10:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:10:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 16:10:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 16:10:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:10:43,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:10:43,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:10:43,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:10:43,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:10:43,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:10:43,722 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 16:10:43,815 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:10:43,817 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:10:44,139 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:10:44,139 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:10:44,225 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:10:44,226 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:10:44,226 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:10:44 BoogieIcfgContainer [2024-01-31 16:10:44,226 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:10:44,228 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:10:44,228 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:10:44,230 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:10:44,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:10:43" (1/4) ... [2024-01-31 16:10:44,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a510d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:10:44, skipping insertion in model container [2024-01-31 16:10:44,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:10:43" (2/4) ... [2024-01-31 16:10:44,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a510d19 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:10:44, skipping insertion in model container [2024-01-31 16:10:44,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:10:43" (3/4) ... [2024-01-31 16:10:44,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a510d19 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:10:44, skipping insertion in model container [2024-01-31 16:10:44,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:10:44" (4/4) ... [2024-01-31 16:10:44,232 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2024-01-31 16:10:44,246 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:10:44,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-01-31 16:10:44,246 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:10:44,314 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:10:44,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 48 transitions, 110 flow [2024-01-31 16:10:44,395 INFO L124 PetriNetUnfolderBase]: 2/46 cut-off events. [2024-01-31 16:10:44,395 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:10:44,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 2/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 95 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-01-31 16:10:44,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 48 transitions, 110 flow [2024-01-31 16:10:44,401 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 45 transitions, 102 flow [2024-01-31 16:10:44,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:10:44,419 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;@11f7d642, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:10:44,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-01-31 16:10:44,422 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:10:44,422 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:10:44,422 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:10:44,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:44,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:10:44,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:44,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:44,428 INFO L85 PathProgramCache]: Analyzing trace with hash 10013, now seen corresponding path program 1 times [2024-01-31 16:10:44,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:44,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359789827] [2024-01-31 16:10:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:44,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:44,759 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 16:10:44,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:44,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359789827] [2024-01-31 16:10:44,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359789827] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:10:44,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:10:44,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:10:44,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223296312] [2024-01-31 16:10:44,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:10:44,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:10:44,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:44,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:10:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:10:44,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-01-31 16:10:44,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 16:10:44,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:44,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-01-31 16:10:44,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:44,972 INFO L124 PetriNetUnfolderBase]: 176/373 cut-off events. [2024-01-31 16:10:44,972 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-01-31 16:10:44,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 373 events. 176/373 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1786 event pairs, 144 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 620. Up to 312 conditions per place. [2024-01-31 16:10:44,978 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 28 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-01-31 16:10:44,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 41 transitions, 154 flow [2024-01-31 16:10:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:10:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:10:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-01-31 16:10:44,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-01-31 16:10:44,989 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 102 flow. Second operand 3 states and 73 transitions. [2024-01-31 16:10:44,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 41 transitions, 154 flow [2024-01-31 16:10:44,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:10:44,996 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 90 flow [2024-01-31 16:10:44,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-01-31 16:10:45,000 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-01-31 16:10:45,001 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 90 flow [2024-01-31 16:10:45,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 16:10:45,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:45,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-01-31 16:10:45,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:10:45,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:45,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:45,002 INFO L85 PathProgramCache]: Analyzing trace with hash 310724, now seen corresponding path program 1 times [2024-01-31 16:10:45,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:45,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919070818] [2024-01-31 16:10:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:45,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:45,073 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 16:10:45,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:45,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919070818] [2024-01-31 16:10:45,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919070818] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:10:45,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:10:45,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:10:45,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491047462] [2024-01-31 16:10:45,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:10:45,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:10:45,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:10:45,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:10:45,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-01-31 16:10:45,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 16:10:45,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:45,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-01-31 16:10:45,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:45,191 INFO L124 PetriNetUnfolderBase]: 133/282 cut-off events. [2024-01-31 16:10:45,192 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:10:45,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 282 events. 133/282 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1355 event pairs, 105 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 523. Up to 237 conditions per place. [2024-01-31 16:10:45,197 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 25 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-01-31 16:10:45,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 142 flow [2024-01-31 16:10:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:10:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:10:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-01-31 16:10:45,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-01-31 16:10:45,208 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 90 flow. Second operand 3 states and 76 transitions. [2024-01-31 16:10:45,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 142 flow [2024-01-31 16:10:45,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:10:45,209 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 88 flow [2024-01-31 16:10:45,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, 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 16:10:45,210 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2024-01-31 16:10:45,210 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 88 flow [2024-01-31 16:10:45,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 16:10:45,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:45,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-01-31 16:10:45,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:10:45,210 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:45,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:45,211 INFO L85 PathProgramCache]: Analyzing trace with hash 9632742, now seen corresponding path program 1 times [2024-01-31 16:10:45,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:45,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877086956] [2024-01-31 16:10:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:45,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:45,245 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 16:10:45,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:45,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877086956] [2024-01-31 16:10:45,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877086956] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:10:45,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:10:45,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:10:45,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004299557] [2024-01-31 16:10:45,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:10:45,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:10:45,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:45,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:10:45,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:10:45,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-01-31 16:10:45,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 16:10:45,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:45,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-01-31 16:10:45,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:45,346 INFO L124 PetriNetUnfolderBase]: 196/444 cut-off events. [2024-01-31 16:10:45,346 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:10:45,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 444 events. 196/444 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2378 event pairs, 82 based on Foata normal form. 1/378 useless extension candidates. Maximal degree in co-relation 805. Up to 209 conditions per place. [2024-01-31 16:10:45,349 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 36 selfloop transitions, 2 changer transitions 1/52 dead transitions. [2024-01-31 16:10:45,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 193 flow [2024-01-31 16:10:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:10:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:10:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-01-31 16:10:45,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-01-31 16:10:45,351 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 88 flow. Second operand 3 states and 94 transitions. [2024-01-31 16:10:45,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 193 flow [2024-01-31 16:10:45,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 52 transitions, 189 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:10:45,353 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 94 flow [2024-01-31 16:10:45,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-01-31 16:10:45,354 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2024-01-31 16:10:45,354 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 94 flow [2024-01-31 16:10:45,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 16:10:45,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:45,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:10:45,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:10:45,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:45,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:45,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1172044969, now seen corresponding path program 1 times [2024-01-31 16:10:45,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:45,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997732790] [2024-01-31 16:10:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:45,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:45,559 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 16:10:45,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:45,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997732790] [2024-01-31 16:10:45,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997732790] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:10:45,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:10:45,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:10:45,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790313984] [2024-01-31 16:10:45,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:10:45,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:10:45,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:45,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:10:45,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:10:45,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-01-31 16:10:45,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 16:10:45,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:45,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-01-31 16:10:45,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:45,673 INFO L124 PetriNetUnfolderBase]: 211/487 cut-off events. [2024-01-31 16:10:45,673 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-01-31 16:10:45,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 487 events. 211/487 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2659 event pairs, 102 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 414. Up to 362 conditions per place. [2024-01-31 16:10:45,676 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 32 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2024-01-31 16:10:45,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 173 flow [2024-01-31 16:10:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:10:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:10:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-01-31 16:10:45,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-01-31 16:10:45,679 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 94 flow. Second operand 4 states and 99 transitions. [2024-01-31 16:10:45,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 173 flow [2024-01-31 16:10:45,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:10:45,681 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 92 flow [2024-01-31 16:10:45,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-01-31 16:10:45,682 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2024-01-31 16:10:45,682 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 92 flow [2024-01-31 16:10:45,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 16:10:45,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:45,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:10:45,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:10:45,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:45,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1053794060, now seen corresponding path program 1 times [2024-01-31 16:10:45,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:45,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704949009] [2024-01-31 16:10:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:45,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:45,790 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 16:10:45,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:45,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704949009] [2024-01-31 16:10:45,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704949009] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:10:45,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:10:45,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:10:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211404029] [2024-01-31 16:10:45,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:10:45,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:10:45,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:10:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:10:45,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-01-31 16:10:45,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 16:10:45,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:45,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-01-31 16:10:45,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:45,917 INFO L124 PetriNetUnfolderBase]: 246/459 cut-off events. [2024-01-31 16:10:45,917 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-01-31 16:10:45,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 459 events. 246/459 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2112 event pairs, 23 based on Foata normal form. 26/451 useless extension candidates. Maximal degree in co-relation 833. Up to 201 conditions per place. [2024-01-31 16:10:45,919 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 42 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2024-01-31 16:10:45,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 220 flow [2024-01-31 16:10:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:10:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:10:45,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-01-31 16:10:45,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-01-31 16:10:45,921 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 92 flow. Second operand 4 states and 99 transitions. [2024-01-31 16:10:45,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 220 flow [2024-01-31 16:10:45,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 217 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:10:45,924 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 108 flow [2024-01-31 16:10:45,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-01-31 16:10:45,925 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2024-01-31 16:10:45,925 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 108 flow [2024-01-31 16:10:45,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 16:10:45,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:45,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:10:45,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:10:45,926 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:45,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:45,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1053136094, now seen corresponding path program 1 times [2024-01-31 16:10:45,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:45,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438931816] [2024-01-31 16:10:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:45,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:46,056 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 16:10:46,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:46,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438931816] [2024-01-31 16:10:46,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438931816] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:10:46,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:10:46,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:10:46,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345974317] [2024-01-31 16:10:46,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:10:46,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:10:46,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:46,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:10:46,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:10:46,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-01-31 16:10:46,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 16:10:46,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:46,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-01-31 16:10:46,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:46,151 INFO L124 PetriNetUnfolderBase]: 189/411 cut-off events. [2024-01-31 16:10:46,151 INFO L125 PetriNetUnfolderBase]: For 190/215 co-relation queries the response was YES. [2024-01-31 16:10:46,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 411 events. 189/411 cut-off events. For 190/215 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1989 event pairs, 7 based on Foata normal form. 13/401 useless extension candidates. Maximal degree in co-relation 885. Up to 277 conditions per place. [2024-01-31 16:10:46,153 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 42 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-01-31 16:10:46,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 261 flow [2024-01-31 16:10:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:10:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:10:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-01-31 16:10:46,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-01-31 16:10:46,155 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 108 flow. Second operand 4 states and 104 transitions. [2024-01-31 16:10:46,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 261 flow [2024-01-31 16:10:46,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:10:46,157 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 107 flow [2024-01-31 16:10:46,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-01-31 16:10:46,159 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2024-01-31 16:10:46,159 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 107 flow [2024-01-31 16:10:46,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 16:10:46,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:46,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:10:46,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:10:46,160 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:46,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:46,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1548484703, now seen corresponding path program 1 times [2024-01-31 16:10:46,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:46,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010750780] [2024-01-31 16:10:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:46,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:46,288 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 16:10:46,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:46,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010750780] [2024-01-31 16:10:46,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010750780] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:10:46,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:10:46,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:10:46,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480491883] [2024-01-31 16:10:46,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:10:46,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:10:46,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:46,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:10:46,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:10:46,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-01-31 16:10:46,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 16:10:46,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:46,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-01-31 16:10:46,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:46,387 INFO L124 PetriNetUnfolderBase]: 241/441 cut-off events. [2024-01-31 16:10:46,387 INFO L125 PetriNetUnfolderBase]: For 201/227 co-relation queries the response was YES. [2024-01-31 16:10:46,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 441 events. 241/441 cut-off events. For 201/227 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1776 event pairs, 47 based on Foata normal form. 32/438 useless extension candidates. Maximal degree in co-relation 1057. Up to 178 conditions per place. [2024-01-31 16:10:46,389 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 43 selfloop transitions, 4 changer transitions 3/55 dead transitions. [2024-01-31 16:10:46,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 281 flow [2024-01-31 16:10:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:10:46,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:10:46,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-01-31 16:10:46,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-01-31 16:10:46,391 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 107 flow. Second operand 4 states and 98 transitions. [2024-01-31 16:10:46,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 281 flow [2024-01-31 16:10:46,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:10:46,393 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 117 flow [2024-01-31 16:10:46,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2024-01-31 16:10:46,394 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-01-31 16:10:46,395 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 117 flow [2024-01-31 16:10:46,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 16:10:46,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:46,395 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 16:10:46,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:10:46,395 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:46,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:46,396 INFO L85 PathProgramCache]: Analyzing trace with hash 56900218, now seen corresponding path program 1 times [2024-01-31 16:10:46,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:46,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429289918] [2024-01-31 16:10:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:46,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:46,495 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 16:10:46,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:46,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429289918] [2024-01-31 16:10:46,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429289918] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:10:46,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:10:46,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:10:46,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128409384] [2024-01-31 16:10:46,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:10:46,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:10:46,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:46,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:10:46,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:10:46,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-01-31 16:10:46,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 117 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 16:10:46,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:46,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-01-31 16:10:46,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:46,601 INFO L124 PetriNetUnfolderBase]: 242/471 cut-off events. [2024-01-31 16:10:46,601 INFO L125 PetriNetUnfolderBase]: For 329/329 co-relation queries the response was YES. [2024-01-31 16:10:46,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1278 conditions, 471 events. 242/471 cut-off events. For 329/329 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1937 event pairs, 47 based on Foata normal form. 14/482 useless extension candidates. Maximal degree in co-relation 1254. Up to 282 conditions per place. [2024-01-31 16:10:46,604 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 46 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-01-31 16:10:46,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 296 flow [2024-01-31 16:10:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:10:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:10:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-01-31 16:10:46,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-01-31 16:10:46,605 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 117 flow. Second operand 4 states and 114 transitions. [2024-01-31 16:10:46,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 296 flow [2024-01-31 16:10:46,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 286 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-31 16:10:46,608 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 155 flow [2024-01-31 16:10:46,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-01-31 16:10:46,610 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-01-31 16:10:46,610 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 155 flow [2024-01-31 16:10:46,610 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 16:10:46,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:46,610 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 16:10:46,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:10:46,611 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:46,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1239628862, now seen corresponding path program 2 times [2024-01-31 16:10:46,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:46,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691174785] [2024-01-31 16:10:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:46,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:46,747 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 16:10:46,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:46,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691174785] [2024-01-31 16:10:46,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691174785] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:10:46,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:10:46,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:10:46,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820530367] [2024-01-31 16:10:46,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:10:46,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:10:46,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:46,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:10:46,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:10:46,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-01-31 16:10:46,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 16:10:46,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:46,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-01-31 16:10:46,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:46,885 INFO L124 PetriNetUnfolderBase]: 307/584 cut-off events. [2024-01-31 16:10:46,886 INFO L125 PetriNetUnfolderBase]: For 805/805 co-relation queries the response was YES. [2024-01-31 16:10:46,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 584 events. 307/584 cut-off events. For 805/805 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2680 event pairs, 102 based on Foata normal form. 4/585 useless extension candidates. Maximal degree in co-relation 1756. Up to 378 conditions per place. [2024-01-31 16:10:46,889 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 53 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-01-31 16:10:46,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 433 flow [2024-01-31 16:10:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:10:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:10:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-01-31 16:10:46,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-01-31 16:10:46,890 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 155 flow. Second operand 5 states and 135 transitions. [2024-01-31 16:10:46,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 433 flow [2024-01-31 16:10:46,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 429 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-01-31 16:10:46,893 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 254 flow [2024-01-31 16:10:46,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2024-01-31 16:10:46,894 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-01-31 16:10:46,894 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 254 flow [2024-01-31 16:10:46,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 16:10:46,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:46,894 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 16:10:46,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:10:46,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:46,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:46,895 INFO L85 PathProgramCache]: Analyzing trace with hash 989635462, now seen corresponding path program 3 times [2024-01-31 16:10:46,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:46,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325639483] [2024-01-31 16:10:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:46,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:46,957 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 16:10:46,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:46,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325639483] [2024-01-31 16:10:46,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325639483] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:10:46,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:10:46,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:10:46,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703459137] [2024-01-31 16:10:46,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:10:46,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:10:46,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:10:46,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:10:46,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-01-31 16:10:46,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 254 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 16:10:46,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:46,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-01-31 16:10:46,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:47,104 INFO L124 PetriNetUnfolderBase]: 336/665 cut-off events. [2024-01-31 16:10:47,105 INFO L125 PetriNetUnfolderBase]: For 1360/1360 co-relation queries the response was YES. [2024-01-31 16:10:47,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2160 conditions, 665 events. 336/665 cut-off events. For 1360/1360 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3081 event pairs, 120 based on Foata normal form. 20/682 useless extension candidates. Maximal degree in co-relation 2130. Up to 308 conditions per place. [2024-01-31 16:10:47,108 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 52 selfloop transitions, 13 changer transitions 1/71 dead transitions. [2024-01-31 16:10:47,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 500 flow [2024-01-31 16:10:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:10:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:10:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-01-31 16:10:47,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-01-31 16:10:47,109 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 254 flow. Second operand 4 states and 117 transitions. [2024-01-31 16:10:47,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 500 flow [2024-01-31 16:10:47,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 500 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:10:47,112 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 314 flow [2024-01-31 16:10:47,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=314, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-01-31 16:10:47,112 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-01-31 16:10:47,112 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 314 flow [2024-01-31 16:10:47,112 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 16:10:47,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:47,113 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 16:10:47,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:10:47,113 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:47,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:47,113 INFO L85 PathProgramCache]: Analyzing trace with hash 905904528, now seen corresponding path program 4 times [2024-01-31 16:10:47,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:47,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617833181] [2024-01-31 16:10:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:47,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:47,208 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 16:10:47,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:47,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617833181] [2024-01-31 16:10:47,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617833181] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:10:47,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:10:47,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:10:47,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631974188] [2024-01-31 16:10:47,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:10:47,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:10:47,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:47,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:10:47,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:10:47,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-01-31 16:10:47,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 314 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 16:10:47,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:47,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-01-31 16:10:47,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:47,369 INFO L124 PetriNetUnfolderBase]: 326/635 cut-off events. [2024-01-31 16:10:47,370 INFO L125 PetriNetUnfolderBase]: For 1868/1868 co-relation queries the response was YES. [2024-01-31 16:10:47,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2313 conditions, 635 events. 326/635 cut-off events. For 1868/1868 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2810 event pairs, 136 based on Foata normal form. 8/640 useless extension candidates. Maximal degree in co-relation 2280. Up to 286 conditions per place. [2024-01-31 16:10:47,373 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 44 selfloop transitions, 10 changer transitions 6/65 dead transitions. [2024-01-31 16:10:47,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 501 flow [2024-01-31 16:10:47,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:10:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:10:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-01-31 16:10:47,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-01-31 16:10:47,375 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 314 flow. Second operand 5 states and 130 transitions. [2024-01-31 16:10:47,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 501 flow [2024-01-31 16:10:47,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 473 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-01-31 16:10:47,379 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 303 flow [2024-01-31 16:10:47,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2024-01-31 16:10:47,380 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-01-31 16:10:47,381 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 303 flow [2024-01-31 16:10:47,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 16:10:47,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:47,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:10:47,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:10:47,381 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:47,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash -856180958, now seen corresponding path program 1 times [2024-01-31 16:10:47,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:47,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710639812] [2024-01-31 16:10:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:47,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:47,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:47,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710639812] [2024-01-31 16:10:47,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710639812] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:10:47,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926036557] [2024-01-31 16:10:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:47,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:47,606 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 16:10:47,628 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 16:10:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:47,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 16:10:47,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:10:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:10:47,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:10:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:10:47,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926036557] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:10:47,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:10:47,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2024-01-31 16:10:47,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855056820] [2024-01-31 16:10:47,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:10:47,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:10:47,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:47,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:10:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:10:47,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-01-31 16:10:47,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 303 flow. Second operand has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 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 16:10:47,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:47,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-01-31 16:10:47,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:47,995 INFO L124 PetriNetUnfolderBase]: 415/890 cut-off events. [2024-01-31 16:10:47,996 INFO L125 PetriNetUnfolderBase]: For 2261/2270 co-relation queries the response was YES. [2024-01-31 16:10:47,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3029 conditions, 890 events. 415/890 cut-off events. For 2261/2270 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4664 event pairs, 83 based on Foata normal form. 17/897 useless extension candidates. Maximal degree in co-relation 2992. Up to 306 conditions per place. [2024-01-31 16:10:48,002 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 58 selfloop transitions, 6 changer transitions 5/83 dead transitions. [2024-01-31 16:10:48,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 645 flow [2024-01-31 16:10:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:10:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:10:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-01-31 16:10:48,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-01-31 16:10:48,004 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 303 flow. Second operand 5 states and 140 transitions. [2024-01-31 16:10:48,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 645 flow [2024-01-31 16:10:48,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 605 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-01-31 16:10:48,010 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 315 flow [2024-01-31 16:10:48,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2024-01-31 16:10:48,011 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-01-31 16:10:48,011 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 315 flow [2024-01-31 16:10:48,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 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 16:10:48,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:48,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:10:48,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 16:10:48,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-31 16:10:48,224 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:48,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash 2054179600, now seen corresponding path program 2 times [2024-01-31 16:10:48,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:48,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328770176] [2024-01-31 16:10:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:48,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:48,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:48,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328770176] [2024-01-31 16:10:48,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328770176] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:10:48,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410943877] [2024-01-31 16:10:48,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:10:48,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:48,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:48,397 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 16:10:48,419 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 16:10:48,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:10:48,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:10:48,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:10:48,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:10:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:48,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:10:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:48,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410943877] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:10:48,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:10:48,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 16:10:48,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006473068] [2024-01-31 16:10:48,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:10:48,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:10:48,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:48,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:10:48,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:10:48,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:10:48,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 315 flow. Second operand has 13 states, 13 states have (on average 18.76923076923077) internal successors, (244), 13 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:10:48,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:48,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:10:48,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:49,638 INFO L124 PetriNetUnfolderBase]: 2143/3529 cut-off events. [2024-01-31 16:10:49,638 INFO L125 PetriNetUnfolderBase]: For 7511/7511 co-relation queries the response was YES. [2024-01-31 16:10:49,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12496 conditions, 3529 events. 2143/3529 cut-off events. For 7511/7511 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 17912 event pairs, 196 based on Foata normal form. 28/3553 useless extension candidates. Maximal degree in co-relation 12460. Up to 898 conditions per place. [2024-01-31 16:10:49,656 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 165 selfloop transitions, 62 changer transitions 6/236 dead transitions. [2024-01-31 16:10:49,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 236 transitions, 1915 flow [2024-01-31 16:10:49,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:10:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:10:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 426 transitions. [2024-01-31 16:10:49,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220588235294118 [2024-01-31 16:10:49,659 INFO L175 Difference]: Start difference. First operand has 62 places, 50 transitions, 315 flow. Second operand 17 states and 426 transitions. [2024-01-31 16:10:49,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 236 transitions, 1915 flow [2024-01-31 16:10:49,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 236 transitions, 1873 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-01-31 16:10:49,668 INFO L231 Difference]: Finished difference. Result has 86 places, 103 transitions, 963 flow [2024-01-31 16:10:49,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=963, PETRI_PLACES=86, PETRI_TRANSITIONS=103} [2024-01-31 16:10:49,669 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 36 predicate places. [2024-01-31 16:10:49,669 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 103 transitions, 963 flow [2024-01-31 16:10:49,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.76923076923077) internal successors, (244), 13 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:10:49,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:49,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:10:49,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-31 16:10:49,879 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,SelfDestructingSolverStorable12 [2024-01-31 16:10:49,879 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:49,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:49,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1814257944, now seen corresponding path program 3 times [2024-01-31 16:10:49,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:49,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904233357] [2024-01-31 16:10:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:49,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:50,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:50,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904233357] [2024-01-31 16:10:50,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904233357] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:10:50,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281863689] [2024-01-31 16:10:50,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:10:50,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:50,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:50,053 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 16:10:50,055 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 16:10:50,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 16:10:50,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:10:50,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:10:50,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:10:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:50,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:10:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:50,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281863689] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:10:50,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:10:50,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-31 16:10:50,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947605125] [2024-01-31 16:10:50,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:10:50,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:10:50,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:50,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:10:50,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:10:50,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:10:50,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 103 transitions, 963 flow. Second operand has 14 states, 14 states have (on average 18.428571428571427) internal successors, (258), 14 states have internal predecessors, (258), 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 16:10:50,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:50,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:10:50,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:51,053 INFO L124 PetriNetUnfolderBase]: 2332/3848 cut-off events. [2024-01-31 16:10:51,053 INFO L125 PetriNetUnfolderBase]: For 18775/18775 co-relation queries the response was YES. [2024-01-31 16:10:51,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16296 conditions, 3848 events. 2332/3848 cut-off events. For 18775/18775 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 20196 event pairs, 373 based on Foata normal form. 16/3860 useless extension candidates. Maximal degree in co-relation 16248. Up to 1440 conditions per place. [2024-01-31 16:10:51,084 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 145 selfloop transitions, 50 changer transitions 12/210 dead transitions. [2024-01-31 16:10:51,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 210 transitions, 2109 flow [2024-01-31 16:10:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:10:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:10:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 328 transitions. [2024-01-31 16:10:51,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-01-31 16:10:51,086 INFO L175 Difference]: Start difference. First operand has 86 places, 103 transitions, 963 flow. Second operand 14 states and 328 transitions. [2024-01-31 16:10:51,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 210 transitions, 2109 flow [2024-01-31 16:10:51,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 210 transitions, 1974 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-01-31 16:10:51,112 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 1227 flow [2024-01-31 16:10:51,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1227, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2024-01-31 16:10:51,113 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2024-01-31 16:10:51,113 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 1227 flow [2024-01-31 16:10:51,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.428571428571427) internal successors, (258), 14 states have internal predecessors, (258), 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 16:10:51,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:51,114 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:10:51,149 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 16:10:51,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:51,342 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:51,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:51,342 INFO L85 PathProgramCache]: Analyzing trace with hash 26507622, now seen corresponding path program 4 times [2024-01-31 16:10:51,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:51,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362562751] [2024-01-31 16:10:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:51,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:51,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:51,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362562751] [2024-01-31 16:10:51,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362562751] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:10:51,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908763770] [2024-01-31 16:10:51,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:10:51,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:51,464 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:10:51,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:10:51,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:10:51,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:10:51,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:10:51,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:10:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:51,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:10:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:51,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908763770] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:10:51,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:10:51,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-31 16:10:51,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574613506] [2024-01-31 16:10:51,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:10:51,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:10:51,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:51,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:10:51,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:10:51,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:10:51,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 1227 flow. Second operand has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 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 16:10:51,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:51,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:10:51,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:53,469 INFO L124 PetriNetUnfolderBase]: 3749/6156 cut-off events. [2024-01-31 16:10:53,470 INFO L125 PetriNetUnfolderBase]: For 33569/33569 co-relation queries the response was YES. [2024-01-31 16:10:53,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26954 conditions, 6156 events. 3749/6156 cut-off events. For 33569/33569 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 33628 event pairs, 292 based on Foata normal form. 220/6373 useless extension candidates. Maximal degree in co-relation 26896. Up to 1112 conditions per place. [2024-01-31 16:10:53,516 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 279 selfloop transitions, 207 changer transitions 2/491 dead transitions. [2024-01-31 16:10:53,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 491 transitions, 5038 flow [2024-01-31 16:10:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-31 16:10:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-31 16:10:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 912 transitions. [2024-01-31 16:10:53,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-01-31 16:10:53,519 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 1227 flow. Second operand 39 states and 912 transitions. [2024-01-31 16:10:53,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 491 transitions, 5038 flow [2024-01-31 16:10:53,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 491 transitions, 4988 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-01-31 16:10:53,582 INFO L231 Difference]: Finished difference. Result has 167 places, 276 transitions, 3928 flow [2024-01-31 16:10:53,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3928, PETRI_PLACES=167, PETRI_TRANSITIONS=276} [2024-01-31 16:10:53,583 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 117 predicate places. [2024-01-31 16:10:53,583 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 276 transitions, 3928 flow [2024-01-31 16:10:53,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 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 16:10:53,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:53,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:10:53,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-31 16:10:53,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 16:10:53,795 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:53,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:53,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2079188926, now seen corresponding path program 5 times [2024-01-31 16:10:53,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:53,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699383001] [2024-01-31 16:10:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:53,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:53,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:53,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699383001] [2024-01-31 16:10:53,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699383001] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:10:53,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247190248] [2024-01-31 16:10:53,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:10:53,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:53,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:53,935 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:10:53,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:10:53,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:10:53,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:10:53,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:10:53,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:10:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:54,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:10:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:54,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247190248] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:10:54,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:10:54,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-01-31 16:10:54,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435128984] [2024-01-31 16:10:54,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:10:54,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:10:54,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:54,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:10:54,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:10:55,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-31 16:10:55,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:10:55,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 276 transitions, 3928 flow. Second operand has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 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 16:10:55,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:55,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:10:55,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:58,792 INFO L124 PetriNetUnfolderBase]: 4622/7577 cut-off events. [2024-01-31 16:10:58,793 INFO L125 PetriNetUnfolderBase]: For 70437/70437 co-relation queries the response was YES. [2024-01-31 16:10:58,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40110 conditions, 7577 events. 4622/7577 cut-off events. For 70437/70437 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 43392 event pairs, 301 based on Foata normal form. 90/7664 useless extension candidates. Maximal degree in co-relation 40024. Up to 1373 conditions per place. [2024-01-31 16:10:58,875 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 229 selfloop transitions, 308 changer transitions 5/545 dead transitions. [2024-01-31 16:10:58,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 545 transitions, 7761 flow [2024-01-31 16:10:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:10:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:10:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 622 transitions. [2024-01-31 16:10:58,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799382716049383 [2024-01-31 16:10:58,879 INFO L175 Difference]: Start difference. First operand has 167 places, 276 transitions, 3928 flow. Second operand 27 states and 622 transitions. [2024-01-31 16:10:58,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 545 transitions, 7761 flow [2024-01-31 16:10:59,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 545 transitions, 7285 flow, removed 225 selfloop flow, removed 4 redundant places. [2024-01-31 16:10:59,176 INFO L231 Difference]: Finished difference. Result has 197 places, 401 transitions, 6460 flow [2024-01-31 16:10:59,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6460, PETRI_PLACES=197, PETRI_TRANSITIONS=401} [2024-01-31 16:10:59,177 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 147 predicate places. [2024-01-31 16:10:59,177 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 401 transitions, 6460 flow [2024-01-31 16:10:59,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 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 16:10:59,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:59,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:10:59,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 16:10:59,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 16:10:59,380 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:10:59,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:59,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1798543612, now seen corresponding path program 6 times [2024-01-31 16:10:59,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:59,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998651126] [2024-01-31 16:10:59,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:59,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:59,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:59,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998651126] [2024-01-31 16:10:59,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998651126] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:10:59,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176244626] [2024-01-31 16:10:59,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:10:59,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:59,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:59,505 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:10:59,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:10:59,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:10:59,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:10:59,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:10:59,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:10:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:59,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:10:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:59,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176244626] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:10:59,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:10:59,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 16:10:59,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121337440] [2024-01-31 16:10:59,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:10:59,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:10:59,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:59,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:10:59,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:11:00,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:11:00,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 401 transitions, 6460 flow. Second operand has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:00,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:00,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:11:00,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:02,206 INFO L124 PetriNetUnfolderBase]: 4596/7547 cut-off events. [2024-01-31 16:11:02,207 INFO L125 PetriNetUnfolderBase]: For 79576/79576 co-relation queries the response was YES. [2024-01-31 16:11:02,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42460 conditions, 7547 events. 4596/7547 cut-off events. For 79576/79576 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 43498 event pairs, 799 based on Foata normal form. 16/7560 useless extension candidates. Maximal degree in co-relation 42368. Up to 2165 conditions per place. [2024-01-31 16:11:02,273 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 235 selfloop transitions, 241 changer transitions 3/482 dead transitions. [2024-01-31 16:11:02,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 482 transitions, 7883 flow [2024-01-31 16:11:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:11:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:11:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 361 transitions. [2024-01-31 16:11:02,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013888888888889 [2024-01-31 16:11:02,274 INFO L175 Difference]: Start difference. First operand has 197 places, 401 transitions, 6460 flow. Second operand 15 states and 361 transitions. [2024-01-31 16:11:02,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 482 transitions, 7883 flow [2024-01-31 16:11:02,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 482 transitions, 7557 flow, removed 120 selfloop flow, removed 11 redundant places. [2024-01-31 16:11:02,777 INFO L231 Difference]: Finished difference. Result has 202 places, 403 transitions, 6646 flow [2024-01-31 16:11:02,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6134, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6646, PETRI_PLACES=202, PETRI_TRANSITIONS=403} [2024-01-31 16:11:02,778 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 152 predicate places. [2024-01-31 16:11:02,778 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 403 transitions, 6646 flow [2024-01-31 16:11:02,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:02,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:02,778 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:02,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:02,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 16:11:02,979 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:02,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:02,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1428102286, now seen corresponding path program 7 times [2024-01-31 16:11:02,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:02,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833338720] [2024-01-31 16:11:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:02,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:03,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:03,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833338720] [2024-01-31 16:11:03,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833338720] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:03,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823251324] [2024-01-31 16:11:03,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:11:03,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:03,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:03,092 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:03,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:11:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:03,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:11:03,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:03,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:03,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823251324] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:03,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:03,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-31 16:11:03,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457567801] [2024-01-31 16:11:03,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:03,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:11:03,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:11:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:11:03,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:11:03,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 403 transitions, 6646 flow. Second operand has 14 states, 14 states have (on average 18.285714285714285) internal successors, (256), 14 states have internal predecessors, (256), 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 16:11:03,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:03,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:11:03,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:05,971 INFO L124 PetriNetUnfolderBase]: 5158/8483 cut-off events. [2024-01-31 16:11:05,971 INFO L125 PetriNetUnfolderBase]: For 82561/82561 co-relation queries the response was YES. [2024-01-31 16:11:06,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47117 conditions, 8483 events. 5158/8483 cut-off events. For 82561/82561 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 49569 event pairs, 399 based on Foata normal form. 100/8580 useless extension candidates. Maximal degree in co-relation 47022. Up to 1539 conditions per place. [2024-01-31 16:11:06,044 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 237 selfloop transitions, 392 changer transitions 5/637 dead transitions. [2024-01-31 16:11:06,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 637 transitions, 10068 flow [2024-01-31 16:11:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 16:11:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 16:11:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 724 transitions. [2024-01-31 16:11:06,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48655913978494625 [2024-01-31 16:11:06,046 INFO L175 Difference]: Start difference. First operand has 202 places, 403 transitions, 6646 flow. Second operand 31 states and 724 transitions. [2024-01-31 16:11:06,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 637 transitions, 10068 flow [2024-01-31 16:11:06,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 637 transitions, 9639 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-01-31 16:11:06,496 INFO L231 Difference]: Finished difference. Result has 226 places, 480 transitions, 8579 flow [2024-01-31 16:11:06,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=8579, PETRI_PLACES=226, PETRI_TRANSITIONS=480} [2024-01-31 16:11:06,496 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 176 predicate places. [2024-01-31 16:11:06,496 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 480 transitions, 8579 flow [2024-01-31 16:11:06,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.285714285714285) internal successors, (256), 14 states have internal predecessors, (256), 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 16:11:06,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:06,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:06,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-31 16:11:06,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:06,698 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:06,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:06,699 INFO L85 PathProgramCache]: Analyzing trace with hash -73545874, now seen corresponding path program 8 times [2024-01-31 16:11:06,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:06,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346086653] [2024-01-31 16:11:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:06,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:06,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:06,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346086653] [2024-01-31 16:11:06,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346086653] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:06,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710647299] [2024-01-31 16:11:06,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:11:06,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:06,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:06,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:06,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 16:11:06,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:11:06,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:06,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:11:06,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:06,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:07,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710647299] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:07,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:07,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-01-31 16:11:07,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456482085] [2024-01-31 16:11:07,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:07,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:11:07,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:11:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:11:07,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:11:07,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 480 transitions, 8579 flow. Second operand has 14 states, 14 states have (on average 19.285714285714285) internal successors, (270), 14 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:07,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:07,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:11:07,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:10,154 INFO L124 PetriNetUnfolderBase]: 6537/10685 cut-off events. [2024-01-31 16:11:10,154 INFO L125 PetriNetUnfolderBase]: For 120044/120044 co-relation queries the response was YES. [2024-01-31 16:11:10,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64035 conditions, 10685 events. 6537/10685 cut-off events. For 120044/120044 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 64322 event pairs, 199 based on Foata normal form. 62/10745 useless extension candidates. Maximal degree in co-relation 63934. Up to 3111 conditions per place. [2024-01-31 16:11:10,252 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 240 selfloop transitions, 590 changer transitions 2/835 dead transitions. [2024-01-31 16:11:10,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 835 transitions, 15309 flow [2024-01-31 16:11:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:11:10,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:11:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 534 transitions. [2024-01-31 16:11:10,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483695652173913 [2024-01-31 16:11:10,255 INFO L175 Difference]: Start difference. First operand has 226 places, 480 transitions, 8579 flow. Second operand 23 states and 534 transitions. [2024-01-31 16:11:10,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 835 transitions, 15309 flow [2024-01-31 16:11:11,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 835 transitions, 14722 flow, removed 140 selfloop flow, removed 16 redundant places. [2024-01-31 16:11:11,391 INFO L231 Difference]: Finished difference. Result has 241 places, 705 transitions, 14358 flow [2024-01-31 16:11:11,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8134, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14358, PETRI_PLACES=241, PETRI_TRANSITIONS=705} [2024-01-31 16:11:11,392 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 191 predicate places. [2024-01-31 16:11:11,392 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 705 transitions, 14358 flow [2024-01-31 16:11:11,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.285714285714285) internal successors, (270), 14 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:11,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:11,393 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:11,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:11,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:11,604 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:11,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:11,604 INFO L85 PathProgramCache]: Analyzing trace with hash 661784802, now seen corresponding path program 9 times [2024-01-31 16:11:11,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:11,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099151871] [2024-01-31 16:11:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:11,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:11,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:11,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099151871] [2024-01-31 16:11:11,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099151871] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:11,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816736596] [2024-01-31 16:11:11,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:11:11,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:11,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:11,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:11,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 16:11:11,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 16:11:11,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:11,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:11:11,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:11,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:11,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816736596] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:11,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:11,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 16:11:11,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614625130] [2024-01-31 16:11:11,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:11,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:11:11,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:11,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:11:11,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:11:12,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:11:12,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 705 transitions, 14358 flow. Second operand has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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 16:11:12,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:12,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:11:12,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:17,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-31 16:11:20,012 INFO L124 PetriNetUnfolderBase]: 9447/15280 cut-off events. [2024-01-31 16:11:20,012 INFO L125 PetriNetUnfolderBase]: For 216667/216667 co-relation queries the response was YES. [2024-01-31 16:11:20,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99992 conditions, 15280 events. 9447/15280 cut-off events. For 216667/216667 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 96202 event pairs, 1266 based on Foata normal form. 20/15297 useless extension candidates. Maximal degree in co-relation 99888. Up to 3532 conditions per place. [2024-01-31 16:11:20,186 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 468 selfloop transitions, 730 changer transitions 8/1209 dead transitions. [2024-01-31 16:11:20,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1209 transitions, 25692 flow [2024-01-31 16:11:20,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:11:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:11:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 536 transitions. [2024-01-31 16:11:20,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-01-31 16:11:20,188 INFO L175 Difference]: Start difference. First operand has 241 places, 705 transitions, 14358 flow. Second operand 22 states and 536 transitions. [2024-01-31 16:11:20,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1209 transitions, 25692 flow [2024-01-31 16:11:22,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1209 transitions, 24847 flow, removed 213 selfloop flow, removed 3 redundant places. [2024-01-31 16:11:22,994 INFO L231 Difference]: Finished difference. Result has 267 places, 1004 transitions, 22608 flow [2024-01-31 16:11:22,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=13848, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=22608, PETRI_PLACES=267, PETRI_TRANSITIONS=1004} [2024-01-31 16:11:22,994 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-01-31 16:11:22,994 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 1004 transitions, 22608 flow [2024-01-31 16:11:22,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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 16:11:22,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:22,995 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:23,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:23,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:23,195 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:23,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:23,196 INFO L85 PathProgramCache]: Analyzing trace with hash -104338500, now seen corresponding path program 10 times [2024-01-31 16:11:23,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:23,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305463238] [2024-01-31 16:11:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:23,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:23,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:23,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305463238] [2024-01-31 16:11:23,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305463238] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:23,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058995610] [2024-01-31 16:11:23,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:11:23,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:23,326 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:23,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 16:11:23,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:11:23,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:23,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:11:23,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:23,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058995610] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:23,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:23,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-31 16:11:23,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043694397] [2024-01-31 16:11:23,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:23,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:11:23,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:23,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:11:23,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:11:23,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:11:23,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 1004 transitions, 22608 flow. Second operand has 14 states, 14 states have (on average 18.785714285714285) internal successors, (263), 14 states have internal predecessors, (263), 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 16:11:23,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:23,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:11:23,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:29,617 INFO L124 PetriNetUnfolderBase]: 11079/17940 cut-off events. [2024-01-31 16:11:29,617 INFO L125 PetriNetUnfolderBase]: For 268443/268443 co-relation queries the response was YES. [2024-01-31 16:11:29,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122954 conditions, 17940 events. 11079/17940 cut-off events. For 268443/268443 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 115901 event pairs, 667 based on Foata normal form. 106/18043 useless extension candidates. Maximal degree in co-relation 122842. Up to 5727 conditions per place. [2024-01-31 16:11:29,796 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 377 selfloop transitions, 1067 changer transitions 3/1450 dead transitions. [2024-01-31 16:11:29,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1450 transitions, 32130 flow [2024-01-31 16:11:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-31 16:11:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-31 16:11:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 937 transitions. [2024-01-31 16:11:29,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4761178861788618 [2024-01-31 16:11:29,798 INFO L175 Difference]: Start difference. First operand has 267 places, 1004 transitions, 22608 flow. Second operand 41 states and 937 transitions. [2024-01-31 16:11:29,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1450 transitions, 32130 flow [2024-01-31 16:11:33,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1450 transitions, 31842 flow, removed 133 selfloop flow, removed 4 redundant places. [2024-01-31 16:11:33,909 INFO L231 Difference]: Finished difference. Result has 314 places, 1229 transitions, 31065 flow [2024-01-31 16:11:33,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=22317, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=843, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=31065, PETRI_PLACES=314, PETRI_TRANSITIONS=1229} [2024-01-31 16:11:33,911 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 264 predicate places. [2024-01-31 16:11:33,911 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 1229 transitions, 31065 flow [2024-01-31 16:11:33,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.785714285714285) internal successors, (263), 14 states have internal predecessors, (263), 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 16:11:33,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:33,911 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:33,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:34,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-01-31 16:11:34,112 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:34,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:34,112 INFO L85 PathProgramCache]: Analyzing trace with hash -490177214, now seen corresponding path program 11 times [2024-01-31 16:11:34,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:34,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068852650] [2024-01-31 16:11:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:34,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:34,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:34,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068852650] [2024-01-31 16:11:34,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068852650] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:34,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703205772] [2024-01-31 16:11:34,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:11:34,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:34,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:34,246 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:34,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 16:11:34,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:11:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:34,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 16:11:34,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:34,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:34,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703205772] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:34,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:34,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-31 16:11:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962775640] [2024-01-31 16:11:34,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:34,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:11:34,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:34,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:11:34,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:11:34,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:11:34,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 1229 transitions, 31065 flow. Second operand has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 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 16:11:34,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:34,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:11:34,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:42,355 INFO L124 PetriNetUnfolderBase]: 12863/20975 cut-off events. [2024-01-31 16:11:42,355 INFO L125 PetriNetUnfolderBase]: For 410630/410630 co-relation queries the response was YES. [2024-01-31 16:11:42,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154470 conditions, 20975 events. 12863/20975 cut-off events. For 410630/410630 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 138675 event pairs, 738 based on Foata normal form. 136/21108 useless extension candidates. Maximal degree in co-relation 154348. Up to 3943 conditions per place. [2024-01-31 16:11:42,775 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 434 selfloop transitions, 1297 changer transitions 8/1742 dead transitions. [2024-01-31 16:11:42,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1742 transitions, 43485 flow [2024-01-31 16:11:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-31 16:11:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-31 16:11:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 974 transitions. [2024-01-31 16:11:42,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46117424242424243 [2024-01-31 16:11:42,777 INFO L175 Difference]: Start difference. First operand has 314 places, 1229 transitions, 31065 flow. Second operand 44 states and 974 transitions. [2024-01-31 16:11:42,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1742 transitions, 43485 flow [2024-01-31 16:11:51,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1742 transitions, 42159 flow, removed 113 selfloop flow, removed 9 redundant places. [2024-01-31 16:11:51,425 INFO L231 Difference]: Finished difference. Result has 361 places, 1485 transitions, 41130 flow [2024-01-31 16:11:51,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=29844, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=41130, PETRI_PLACES=361, PETRI_TRANSITIONS=1485} [2024-01-31 16:11:51,427 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 311 predicate places. [2024-01-31 16:11:51,427 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1485 transitions, 41130 flow [2024-01-31 16:11:51,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 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 16:11:51,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:51,428 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:51,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:51,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-01-31 16:11:51,631 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:51,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:51,631 INFO L85 PathProgramCache]: Analyzing trace with hash -566252796, now seen corresponding path program 12 times [2024-01-31 16:11:51,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:51,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301802002] [2024-01-31 16:11:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:51,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:51,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:51,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301802002] [2024-01-31 16:11:51,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301802002] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:51,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78011800] [2024-01-31 16:11:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:11:51,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:51,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:51,765 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:11:51,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 16:11:51,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:11:51,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:51,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:11:51,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:51,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:52,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78011800] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:52,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:52,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-01-31 16:11:52,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552010049] [2024-01-31 16:11:52,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:52,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:11:52,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:11:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:11:52,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:11:52,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1485 transitions, 41130 flow. Second operand has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 13 states have internal predecessors, (251), 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 16:11:52,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:52,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:11:52,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:59,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-31 16:12:07,100 INFO L124 PetriNetUnfolderBase]: 16787/27425 cut-off events. [2024-01-31 16:12:07,100 INFO L125 PetriNetUnfolderBase]: For 605200/605200 co-relation queries the response was YES. [2024-01-31 16:12:07,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215234 conditions, 27425 events. 16787/27425 cut-off events. For 605200/605200 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 189667 event pairs, 2361 based on Foata normal form. 154/27576 useless extension candidates. Maximal degree in co-relation 215100. Up to 12449 conditions per place. [2024-01-31 16:12:07,749 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 1310 selfloop transitions, 921 changer transitions 1/2235 dead transitions. [2024-01-31 16:12:07,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 2235 transitions, 62324 flow [2024-01-31 16:12:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-31 16:12:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-31 16:12:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 794 transitions. [2024-01-31 16:12:07,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48651960784313725 [2024-01-31 16:12:07,753 INFO L175 Difference]: Start difference. First operand has 361 places, 1485 transitions, 41130 flow. Second operand 34 states and 794 transitions. [2024-01-31 16:12:07,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 2235 transitions, 62324 flow [2024-01-31 16:12:26,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 2235 transitions, 59346 flow, removed 210 selfloop flow, removed 14 redundant places. [2024-01-31 16:12:26,240 INFO L231 Difference]: Finished difference. Result has 404 places, 1878 transitions, 53087 flow [2024-01-31 16:12:26,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=38962, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=550, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=53087, PETRI_PLACES=404, PETRI_TRANSITIONS=1878} [2024-01-31 16:12:26,242 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 354 predicate places. [2024-01-31 16:12:26,242 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 1878 transitions, 53087 flow [2024-01-31 16:12:26,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 13 states have internal predecessors, (251), 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 16:12:26,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:26,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:26,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:26,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-31 16:12:26,453 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:26,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:26,453 INFO L85 PathProgramCache]: Analyzing trace with hash 698413382, now seen corresponding path program 13 times [2024-01-31 16:12:26,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:26,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883288517] [2024-01-31 16:12:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:26,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:26,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:26,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883288517] [2024-01-31 16:12:26,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883288517] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:26,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630464884] [2024-01-31 16:12:26,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:12:26,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:26,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:26,570 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:12:26,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 16:12:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:26,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:12:26,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:26,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:12:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:26,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630464884] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:12:26,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:12:26,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 16:12:26,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852189411] [2024-01-31 16:12:26,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:12:26,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:12:26,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:12:26,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:12:26,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:12:26,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 1878 transitions, 53087 flow. Second operand has 12 states, 12 states have (on average 18.75) internal successors, (225), 12 states have internal predecessors, (225), 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 16:12:26,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:26,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:12:26,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:39,514 INFO L124 PetriNetUnfolderBase]: 16927/27673 cut-off events. [2024-01-31 16:12:39,514 INFO L125 PetriNetUnfolderBase]: For 724337/724337 co-relation queries the response was YES. [2024-01-31 16:12:40,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233146 conditions, 27673 events. 16927/27673 cut-off events. For 724337/724337 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 193032 event pairs, 7745 based on Foata normal form. 12/27682 useless extension candidates. Maximal degree in co-relation 232996. Up to 23776 conditions per place. [2024-01-31 16:12:40,336 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 1710 selfloop transitions, 242 changer transitions 7/1962 dead transitions. [2024-01-31 16:12:40,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1962 transitions, 58161 flow [2024-01-31 16:12:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:12:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:12:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 295 transitions. [2024-01-31 16:12:40,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47275641025641024 [2024-01-31 16:12:40,338 INFO L175 Difference]: Start difference. First operand has 404 places, 1878 transitions, 53087 flow. Second operand 13 states and 295 transitions. [2024-01-31 16:12:40,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1962 transitions, 58161 flow [2024-01-31 16:13:00,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 1962 transitions, 57655 flow, removed 129 selfloop flow, removed 4 redundant places. [2024-01-31 16:13:00,703 INFO L231 Difference]: Finished difference. Result has 419 places, 1899 transitions, 53975 flow [2024-01-31 16:13:00,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=52585, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=53975, PETRI_PLACES=419, PETRI_TRANSITIONS=1899} [2024-01-31 16:13:00,705 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 369 predicate places. [2024-01-31 16:13:00,705 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 1899 transitions, 53975 flow [2024-01-31 16:13:00,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.75) internal successors, (225), 12 states have internal predecessors, (225), 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 16:13:00,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:00,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:13:00,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-01-31 16:13:00,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-31 16:13:00,916 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:13:00,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash -942616116, now seen corresponding path program 14 times [2024-01-31 16:13:00,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:00,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364409635] [2024-01-31 16:13:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:00,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:13:01,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:01,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364409635] [2024-01-31 16:13:01,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364409635] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:13:01,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559462150] [2024-01-31 16:13:01,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:13:01,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:13:01,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:13:01,033 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:13:01,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 16:13:01,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:13:01,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:13:01,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:13:01,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:13:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:13:01,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:13:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:13:01,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559462150] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:13:01,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:13:01,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-01-31 16:13:01,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772000672] [2024-01-31 16:13:01,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:13:01,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:13:01,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:01,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:13:01,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:13:01,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:13:01,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1899 transitions, 53975 flow. Second operand has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 14 states have internal predecessors, (262), 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 16:13:01,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:01,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:13:01,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:12,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-31 16:13:17,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-31 16:13:33,662 INFO L124 PetriNetUnfolderBase]: 24395/39525 cut-off events. [2024-01-31 16:13:33,662 INFO L125 PetriNetUnfolderBase]: For 1066219/1066219 co-relation queries the response was YES. [2024-01-31 16:13:34,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340528 conditions, 39525 events. 24395/39525 cut-off events. For 1066219/1066219 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 283605 event pairs, 2381 based on Foata normal form. 104/39626 useless extension candidates. Maximal degree in co-relation 340370. Up to 13095 conditions per place. [2024-01-31 16:13:34,782 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 1062 selfloop transitions, 1945 changer transitions 4/3014 dead transitions. [2024-01-31 16:13:34,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 3014 transitions, 88677 flow [2024-01-31 16:13:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 16:13:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 16:13:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 821 transitions. [2024-01-31 16:13:34,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4886904761904762 [2024-01-31 16:13:34,788 INFO L175 Difference]: Start difference. First operand has 419 places, 1899 transitions, 53975 flow. Second operand 35 states and 821 transitions. [2024-01-31 16:13:34,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 3014 transitions, 88677 flow [2024-01-31 16:14:11,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 3014 transitions, 88604 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-01-31 16:14:11,443 INFO L231 Difference]: Finished difference. Result has 458 places, 2819 transitions, 89007 flow [2024-01-31 16:14:11,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=53880, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=89007, PETRI_PLACES=458, PETRI_TRANSITIONS=2819} [2024-01-31 16:14:11,445 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 408 predicate places. [2024-01-31 16:14:11,445 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 2819 transitions, 89007 flow [2024-01-31 16:14:11,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 14 states have internal predecessors, (262), 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 16:14:11,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:14:11,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:14:11,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 16:14:11,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:14:11,646 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:14:11,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:14:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash 185617186, now seen corresponding path program 15 times [2024-01-31 16:14:11,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:14:11,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117521332] [2024-01-31 16:14:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:14:11,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:14:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:14:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:14:11,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:14:11,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117521332] [2024-01-31 16:14:11,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117521332] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:14:11,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459811023] [2024-01-31 16:14:11,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:14:11,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:14:11,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:14:11,737 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:14:11,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 16:14:11,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:14:11,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:14:11,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:14:11,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:14:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:14:11,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:14:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:14:11,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459811023] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:14:11,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:14:11,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 16:14:11,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533197781] [2024-01-31 16:14:11,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:14:11,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:14:11,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:14:11,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:14:11,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:14:12,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:14:12,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 2819 transitions, 89007 flow. Second operand has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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 16:14:12,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:14:12,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:14:12,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:14:42,719 INFO L124 PetriNetUnfolderBase]: 29187/47045 cut-off events. [2024-01-31 16:14:42,720 INFO L125 PetriNetUnfolderBase]: For 1694413/1694413 co-relation queries the response was YES. [2024-01-31 16:14:44,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468389 conditions, 47045 events. 29187/47045 cut-off events. For 1694413/1694413 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 345512 event pairs, 6680 based on Foata normal form. 24/47066 useless extension candidates. Maximal degree in co-relation 468222. Up to 23227 conditions per place. [2024-01-31 16:14:44,505 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 1632 selfloop transitions, 1855 changer transitions 3/3493 dead transitions. [2024-01-31 16:14:44,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 3493 transitions, 115372 flow [2024-01-31 16:14:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:14:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:14:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 526 transitions. [2024-01-31 16:14:44,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981060606060606 [2024-01-31 16:14:44,506 INFO L175 Difference]: Start difference. First operand has 458 places, 2819 transitions, 89007 flow. Second operand 22 states and 526 transitions. [2024-01-31 16:14:44,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 3493 transitions, 115372 flow [2024-01-31 16:15:53,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 3493 transitions, 114268 flow, removed 408 selfloop flow, removed 12 redundant places. [2024-01-31 16:15:53,245 INFO L231 Difference]: Finished difference. Result has 473 places, 3353 transitions, 111803 flow [2024-01-31 16:15:53,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88244, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=111803, PETRI_PLACES=473, PETRI_TRANSITIONS=3353} [2024-01-31 16:15:53,247 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 423 predicate places. [2024-01-31 16:15:53,247 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 3353 transitions, 111803 flow [2024-01-31 16:15:53,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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 16:15:53,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:15:53,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:15:53,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 16:15:53,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-31 16:15:53,448 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:15:53,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:15:53,449 INFO L85 PathProgramCache]: Analyzing trace with hash -912228156, now seen corresponding path program 16 times [2024-01-31 16:15:53,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:15:53,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616329021] [2024-01-31 16:15:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:15:53,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:15:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:15:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:15:53,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:15:53,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616329021] [2024-01-31 16:15:53,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616329021] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:15:53,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400223380] [2024-01-31 16:15:53,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:15:53,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:15:53,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:15:53,571 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:15:53,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 16:15:53,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:15:53,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:15:53,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:15:53,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:15:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:15:53,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:15:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:15:53,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400223380] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:15:53,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:15:53,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-01-31 16:15:53,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671277192] [2024-01-31 16:15:53,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:15:53,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:15:53,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:15:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:15:53,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:15:53,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-01-31 16:15:53,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 3353 transitions, 111803 flow. Second operand has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 14 states have internal predecessors, (262), 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 16:15:53,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:15:53,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-01-31 16:15:53,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand