./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/bigshot_s2.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bigshot_s2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/bigshot_s2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bigshot_s2.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 14:46:13,790 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 14:46:13,862 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 14:46:13,866 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 14:46:13,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 14:46:13,890 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 14:46:13,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 14:46:13,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 14:46:13,892 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 14:46:13,895 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 14:46:13,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 14:46:13,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 14:46:13,896 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 14:46:13,897 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 14:46:13,897 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 14:46:13,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 14:46:13,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 14:46:13,898 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 14:46:13,898 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 14:46:13,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 14:46:13,899 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 14:46:13,899 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 14:46:13,899 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 14:46:13,899 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 14:46:13,900 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 14:46:13,900 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 14:46:13,900 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 14:46:13,900 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 14:46:13,901 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 14:46:13,901 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 14:46:13,902 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 14:46:13,902 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 14:46:13,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 14:46:13,902 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 14:46:13,903 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 14:46:13,903 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 14:46:13,903 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 14:46:13,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 14:46:13,903 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 14:46:13,904 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 14:46:13,904 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 14:46:13,904 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 14:46:13,904 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 14:46:13,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-27 14:46:14,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 14:46:14,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 14:46:14,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 14:46:14,143 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 14:46:14,143 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 14:46:14,144 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s2.i [2024-01-27 14:46:15,246 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 14:46:15,503 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 14:46:15,503 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i [2024-01-27 14:46:15,522 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4aceca95/f0d64ecfd5894f839c7e04c080b60e0d/FLAGddf4c0ce9 [2024-01-27 14:46:15,535 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4aceca95/f0d64ecfd5894f839c7e04c080b60e0d [2024-01-27 14:46:15,536 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-27 14:46:15,537 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-27 14:46:15,537 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bigshot_s2.yml/witness.yml [2024-01-27 14:46:15,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 14:46:15,586 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-27 14:46:15,586 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 14:46:15,587 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 14:46:15,600 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 14:46:15,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 02:46:15" (1/2) ... [2024-01-27 14:46:15,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@459e4cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:46:15, skipping insertion in model container [2024-01-27 14:46:15,601 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 02:46:15" (1/2) ... [2024-01-27 14:46:15,603 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4062ce7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:46:15, skipping insertion in model container [2024-01-27 14:46:15,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 02:46:15" (2/2) ... [2024-01-27 14:46:15,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@459e4cc6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:15, skipping insertion in model container [2024-01-27 14:46:15,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 02:46:15" (2/2) ... [2024-01-27 14:46:15,604 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-27 14:46:15,628 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-27 14:46:15,629 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] expression == 0 || expression == 1 [2024-01-27 14:46:15,630 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] expression <= 1 [2024-01-27 14:46:15,630 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] expression == 0 [2024-01-27 14:46:15,630 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] 0 <= expression [2024-01-27 14:46:15,630 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] expression == 1 [2024-01-27 14:46:15,631 INFO L98 nessWitnessExtractor]: Location invariant before [L1111-L1111] (unsigned long )arg == 0UL [2024-01-27 14:46:15,631 INFO L98 nessWitnessExtractor]: Location invariant before [L1122-L1122] v == 0 [2024-01-27 14:46:15,631 INFO L98 nessWitnessExtractor]: Location invariant before [L1117-L1117] (unsigned long )arg == 0UL [2024-01-27 14:46:15,631 INFO L98 nessWitnessExtractor]: Location invariant before [L1112-L1112] (unsigned long )arg == 0UL [2024-01-27 14:46:15,631 INFO L98 nessWitnessExtractor]: Location invariant before [L1116-L1116] (unsigned long )arg == 0UL [2024-01-27 14:46:15,631 INFO L98 nessWitnessExtractor]: Location invariant before [L1116-L1116] (unsigned long )arg == 0UL [2024-01-27 14:46:15,672 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 14:46:15,964 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i[55203,55216] [2024-01-27 14:46:15,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 14:46:16,000 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 14:46:16,034 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i[55203,55216] [2024-01-27 14:46:16,035 WARN L424 MainDispatcher]: Unable to annotate void __VERIFIER_assert(int expression) { if (!expression) { ERROR: {reach_error();abort();}}; return; } with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-27 14:46:16,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 14:46:16,158 INFO L206 MainTranslator]: Completed translation [2024-01-27 14:46:16,159 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:16 WrapperNode [2024-01-27 14:46:16,159 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 14:46:16,160 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 14:46:16,160 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 14:46:16,160 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 14:46:16,166 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 27.01 02:46:16" (1/1) ... [2024-01-27 14:46:16,178 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 27.01 02:46:16" (1/1) ... [2024-01-27 14:46:16,205 INFO L138 Inliner]: procedures = 323, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2024-01-27 14:46:16,205 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 14:46:16,206 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 14:46:16,206 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 14:46:16,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 14:46:16,215 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:16" (1/1) ... [2024-01-27 14:46:16,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:16" (1/1) ... [2024-01-27 14:46:16,218 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:16" (1/1) ... [2024-01-27 14:46:16,229 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 9, 2, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-01-27 14:46:16,230 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:16" (1/1) ... [2024-01-27 14:46:16,230 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:16" (1/1) ... [2024-01-27 14:46:16,234 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:16" (1/1) ... [2024-01-27 14:46:16,237 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:16" (1/1) ... [2024-01-27 14:46:16,238 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:16" (1/1) ... [2024-01-27 14:46:16,241 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:16" (1/1) ... [2024-01-27 14:46:16,243 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 14:46:16,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 14:46:16,244 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 14:46:16,244 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 14:46:16,245 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:16" (1/1) ... [2024-01-27 14:46:16,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 14:46:16,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:46:16,270 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) [2024-01-27 14:46:16,275 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 [2024-01-27 14:46:16,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 14:46:16,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 14:46:16,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-01-27 14:46:16,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-01-27 14:46:16,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-01-27 14:46:16,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-01-27 14:46:16,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2024-01-27 14:46:16,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 14:46:16,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 14:46:16,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 14:46:16,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 14:46:16,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 14:46:16,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 14:46:16,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 14:46:16,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 14:46:16,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 14:46:16,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 14:46:16,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 14:46:16,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 14:46:16,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 14:46:16,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 14:46:16,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 14:46:16,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 14:46:16,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 14:46:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 14:46:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 14:46:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 14:46:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 14:46:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 14:46:16,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 14:46:16,307 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 14:46:16,429 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 14:46:16,431 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 14:46:16,585 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 14:46:16,585 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 14:46:16,695 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 14:46:16,695 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-01-27 14:46:16,697 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 02:46:16 BoogieIcfgContainer [2024-01-27 14:46:16,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 14:46:16,701 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 14:46:16,701 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 14:46:16,703 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 14:46:16,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 02:46:15" (1/4) ... [2024-01-27 14:46:16,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59471afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 02:46:16, skipping insertion in model container [2024-01-27 14:46:16,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 02:46:15" (2/4) ... [2024-01-27 14:46:16,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59471afa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.01 02:46:16, skipping insertion in model container [2024-01-27 14:46:16,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:46:16" (3/4) ... [2024-01-27 14:46:16,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59471afa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.01 02:46:16, skipping insertion in model container [2024-01-27 14:46:16,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 02:46:16" (4/4) ... [2024-01-27 14:46:16,707 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2024-01-27 14:46:16,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 14:46:16,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-01-27 14:46:16,721 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 14:46:16,786 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 14:46:16,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 37 transitions, 88 flow [2024-01-27 14:46:16,844 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2024-01-27 14:46:16,845 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 14:46:16,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 4/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-01-27 14:46:16,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 37 transitions, 88 flow [2024-01-27 14:46:16,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2024-01-27 14:46:16,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 14:46:16,871 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;@1438ea5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 14:46:16,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-01-27 14:46:16,876 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 14:46:16,876 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-27 14:46:16,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 14:46:16,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:46:16,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-27 14:46:16,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 14:46:16,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:46:16,883 INFO L85 PathProgramCache]: Analyzing trace with hash 7565, now seen corresponding path program 1 times [2024-01-27 14:46:16,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:46:16,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927195348] [2024-01-27 14:46:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:46:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:17,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:46:17,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927195348] [2024-01-27 14:46:17,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927195348] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:46:17,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:46:17,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-27 14:46:17,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031820168] [2024-01-27 14:46:17,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:46:17,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 14:46:17,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:46:17,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 14:46:17,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 14:46:17,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-27 14:46:17,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-01-27 14:46:17,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:46:17,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-27 14:46:17,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:46:17,147 INFO L124 PetriNetUnfolderBase]: 10/57 cut-off events. [2024-01-27 14:46:17,148 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 14:46:17,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 57 events. 10/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 4 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 73. Up to 27 conditions per place. [2024-01-27 14:46:17,149 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 20 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2024-01-27 14:46:17,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 131 flow [2024-01-27 14:46:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 14:46:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 14:46:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-01-27 14:46:17,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2024-01-27 14:46:17,160 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 70 transitions. [2024-01-27 14:46:17,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 131 flow [2024-01-27 14:46:17,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 121 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 14:46:17,164 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 70 flow [2024-01-27 14:46:17,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-01-27 14:46:17,168 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2024-01-27 14:46:17,168 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 70 flow [2024-01-27 14:46:17,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-01-27 14:46:17,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:46:17,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-27 14:46:17,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 14:46:17,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 14:46:17,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:46:17,169 INFO L85 PathProgramCache]: Analyzing trace with hash 225628379, now seen corresponding path program 1 times [2024-01-27 14:46:17,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:46:17,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339108112] [2024-01-27 14:46:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:17,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:46:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:17,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:46:17,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339108112] [2024-01-27 14:46:17,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339108112] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:46:17,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:46:17,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 14:46:17,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135706623] [2024-01-27 14:46:17,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:46:17,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:46:17,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:46:17,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:46:17,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:46:17,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-27 14:46:17,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2024-01-27 14:46:17,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:46:17,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-27 14:46:17,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:46:17,428 INFO L124 PetriNetUnfolderBase]: 10/53 cut-off events. [2024-01-27 14:46:17,429 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 14:46:17,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 53 events. 10/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 5 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 54. Up to 34 conditions per place. [2024-01-27 14:46:17,431 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 17 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-01-27 14:46:17,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 106 flow [2024-01-27 14:46:17,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 14:46:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 14:46:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-01-27 14:46:17,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202702702702703 [2024-01-27 14:46:17,435 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 70 flow. Second operand 4 states and 77 transitions. [2024-01-27 14:46:17,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 106 flow [2024-01-27 14:46:17,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 100 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:46:17,439 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 64 flow [2024-01-27 14:46:17,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2024-01-27 14:46:17,440 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2024-01-27 14:46:17,440 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 64 flow [2024-01-27 14:46:17,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2024-01-27 14:46:17,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:46:17,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:46:17,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 14:46:17,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 14:46:17,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:46:17,443 INFO L85 PathProgramCache]: Analyzing trace with hash -886870397, now seen corresponding path program 1 times [2024-01-27 14:46:17,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:46:17,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991298858] [2024-01-27 14:46:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:17,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:46:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:17,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:46:17,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991298858] [2024-01-27 14:46:17,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991298858] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:46:17,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:46:17,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 14:46:17,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102960118] [2024-01-27 14:46:17,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:46:17,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:46:17,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:46:17,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:46:17,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:46:17,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-27 14:46:17,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-01-27 14:46:17,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:46:17,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-27 14:46:17,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:46:17,660 INFO L124 PetriNetUnfolderBase]: 10/43 cut-off events. [2024-01-27 14:46:17,661 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 14:46:17,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 43 events. 10/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 2 based on Foata normal form. 4/46 useless extension candidates. Maximal degree in co-relation 69. Up to 18 conditions per place. [2024-01-27 14:46:17,661 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 17 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2024-01-27 14:46:17,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 98 flow [2024-01-27 14:46:17,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 14:46:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 14:46:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-01-27 14:46:17,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-27 14:46:17,665 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 64 flow. Second operand 4 states and 74 transitions. [2024-01-27 14:46:17,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 98 flow [2024-01-27 14:46:17,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 95 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:46:17,667 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 59 flow [2024-01-27 14:46:17,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=59, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2024-01-27 14:46:17,668 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -6 predicate places. [2024-01-27 14:46:17,668 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 59 flow [2024-01-27 14:46:17,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-01-27 14:46:17,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:46:17,670 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] [2024-01-27 14:46:17,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 14:46:17,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 14:46:17,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:46:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1914405790, now seen corresponding path program 1 times [2024-01-27 14:46:17,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:46:17,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466708134] [2024-01-27 14:46:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:17,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:46:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:17,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:46:17,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466708134] [2024-01-27 14:46:17,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466708134] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:46:17,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:46:17,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 14:46:17,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258923369] [2024-01-27 14:46:17,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:46:17,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 14:46:17,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:46:17,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 14:46:17,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 14:46:17,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 14:46:17,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2024-01-27 14:46:17,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:46:17,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 14:46:17,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:46:17,743 INFO L124 PetriNetUnfolderBase]: 8/38 cut-off events. [2024-01-27 14:46:17,743 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 14:46:17,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 38 events. 8/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 24 event pairs, 4 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 64. Up to 26 conditions per place. [2024-01-27 14:46:17,744 INFO L140 encePairwiseOnDemand]: 35/37 looper letters, 17 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2024-01-27 14:46:17,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 95 flow [2024-01-27 14:46:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 14:46:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 14:46:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-01-27 14:46:17,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-01-27 14:46:17,745 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 59 flow. Second operand 3 states and 67 transitions. [2024-01-27 14:46:17,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 95 flow [2024-01-27 14:46:17,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 92 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:46:17,746 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 56 flow [2024-01-27 14:46:17,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-01-27 14:46:17,747 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -6 predicate places. [2024-01-27 14:46:17,747 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 56 flow [2024-01-27 14:46:17,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2024-01-27 14:46:17,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:46:17,747 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] [2024-01-27 14:46:17,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 14:46:17,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 14:46:17,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:46:17,748 INFO L85 PathProgramCache]: Analyzing trace with hash -36492107, now seen corresponding path program 1 times [2024-01-27 14:46:17,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:46:17,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334930463] [2024-01-27 14:46:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:17,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:46:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:17,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:46:17,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334930463] [2024-01-27 14:46:17,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334930463] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:46:17,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:46:17,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 14:46:17,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100702913] [2024-01-27 14:46:17,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:46:17,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 14:46:17,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:46:17,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 14:46:17,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-27 14:46:17,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-27 14:46:17,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 56 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 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) [2024-01-27 14:46:17,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:46:17,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-27 14:46:17,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:46:18,080 INFO L124 PetriNetUnfolderBase]: 13/56 cut-off events. [2024-01-27 14:46:18,080 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 14:46:18,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 56 events. 13/56 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 81 event pairs, 6 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 101. Up to 31 conditions per place. [2024-01-27 14:46:18,081 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 19 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2024-01-27 14:46:18,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 137 flow [2024-01-27 14:46:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 14:46:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 14:46:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-01-27 14:46:18,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797297297297297 [2024-01-27 14:46:18,083 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 56 flow. Second operand 8 states and 142 transitions. [2024-01-27 14:46:18,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 137 flow [2024-01-27 14:46:18,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 14:46:18,084 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 83 flow [2024-01-27 14:46:18,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=83, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2024-01-27 14:46:18,084 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2024-01-27 14:46:18,085 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 83 flow [2024-01-27 14:46:18,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 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) [2024-01-27 14:46:18,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:46:18,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:46:18,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 14:46:18,086 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 14:46:18,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:46:18,086 INFO L85 PathProgramCache]: Analyzing trace with hash -810390334, now seen corresponding path program 1 times [2024-01-27 14:46:18,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:46:18,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614618114] [2024-01-27 14:46:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:18,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:46:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:18,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:46:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614618114] [2024-01-27 14:46:18,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614618114] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:46:18,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499145996] [2024-01-27 14:46:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:18,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:46:18,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:46:18,245 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) [2024-01-27 14:46:18,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 14:46:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:18,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 14:46:18,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:46:18,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 14:46:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:18,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:46:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:18,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499145996] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:46:18,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:46:18,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-01-27 14:46:18,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480943436] [2024-01-27 14:46:18,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:46:18,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 14:46:18,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:46:18,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 14:46:18,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-01-27 14:46:18,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 14:46:18,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 83 flow. Second operand has 14 states, 14 states have (on average 19.357142857142858) internal successors, (271), 14 states have internal predecessors, (271), 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) [2024-01-27 14:46:18,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:46:18,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 14:46:18,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:46:18,683 INFO L124 PetriNetUnfolderBase]: 15/57 cut-off events. [2024-01-27 14:46:18,683 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 14:46:18,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 57 events. 15/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 7 based on Foata normal form. 2/57 useless extension candidates. Maximal degree in co-relation 134. Up to 33 conditions per place. [2024-01-27 14:46:18,684 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 21 selfloop transitions, 6 changer transitions 1/34 dead transitions. [2024-01-27 14:46:18,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 157 flow [2024-01-27 14:46:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 14:46:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 14:46:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-01-27 14:46:18,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444015444015444 [2024-01-27 14:46:18,685 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 83 flow. Second operand 7 states and 141 transitions. [2024-01-27 14:46:18,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 157 flow [2024-01-27 14:46:18,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 152 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 14:46:18,687 INFO L231 Difference]: Finished difference. Result has 42 places, 29 transitions, 108 flow [2024-01-27 14:46:18,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2024-01-27 14:46:18,687 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2024-01-27 14:46:18,688 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 108 flow [2024-01-27 14:46:18,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.357142857142858) internal successors, (271), 14 states have internal predecessors, (271), 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) [2024-01-27 14:46:18,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:46:18,688 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:46:18,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 14:46:18,900 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,SelfDestructingSolverStorable5 [2024-01-27 14:46:18,900 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 14:46:18,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:46:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash -722349663, now seen corresponding path program 2 times [2024-01-27 14:46:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:46:18,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662830365] [2024-01-27 14:46:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:18,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:46:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:19,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:46:19,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662830365] [2024-01-27 14:46:19,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662830365] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:46:19,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43150255] [2024-01-27 14:46:19,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 14:46:19,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:46:19,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:46:19,076 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) [2024-01-27 14:46:19,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 14:46:19,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 14:46:19,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:46:19,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 14:46:19,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:46:19,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 14:46:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:19,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:46:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:19,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43150255] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:46:19,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:46:19,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-01-27 14:46:19,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883171905] [2024-01-27 14:46:19,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:46:19,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 14:46:19,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:46:19,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 14:46:19,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-01-27 14:46:19,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 14:46:19,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 29 transitions, 108 flow. Second operand has 17 states, 17 states have (on average 19.235294117647058) internal successors, (327), 17 states have internal predecessors, (327), 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) [2024-01-27 14:46:19,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:46:19,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 14:46:19,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:46:19,468 INFO L124 PetriNetUnfolderBase]: 17/63 cut-off events. [2024-01-27 14:46:19,468 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-01-27 14:46:19,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 63 events. 17/63 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 7 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 167. Up to 33 conditions per place. [2024-01-27 14:46:19,469 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 23 selfloop transitions, 7 changer transitions 1/37 dead transitions. [2024-01-27 14:46:19,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 37 transitions, 196 flow [2024-01-27 14:46:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 14:46:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 14:46:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-01-27 14:46:19,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-01-27 14:46:19,471 INFO L175 Difference]: Start difference. First operand has 42 places, 29 transitions, 108 flow. Second operand 8 states and 160 transitions. [2024-01-27 14:46:19,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 37 transitions, 196 flow [2024-01-27 14:46:19,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 37 transitions, 184 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-27 14:46:19,472 INFO L231 Difference]: Finished difference. Result has 47 places, 31 transitions, 132 flow [2024-01-27 14:46:19,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=31} [2024-01-27 14:46:19,473 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-01-27 14:46:19,473 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 31 transitions, 132 flow [2024-01-27 14:46:19,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.235294117647058) internal successors, (327), 17 states have internal predecessors, (327), 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) [2024-01-27 14:46:19,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:46:19,474 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:46:19,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 14:46:19,688 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,SelfDestructingSolverStorable6 [2024-01-27 14:46:19,688 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 14:46:19,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:46:19,689 INFO L85 PathProgramCache]: Analyzing trace with hash -667212066, now seen corresponding path program 3 times [2024-01-27 14:46:19,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:46:19,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28576985] [2024-01-27 14:46:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:19,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:46:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:19,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:46:19,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28576985] [2024-01-27 14:46:19,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28576985] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:46:19,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418413835] [2024-01-27 14:46:19,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 14:46:19,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:46:19,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:46:19,867 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) [2024-01-27 14:46:19,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 14:46:19,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 14:46:19,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:46:19,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 14:46:19,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:46:20,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 14:46:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:20,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:46:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:20,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418413835] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:46:20,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:46:20,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-01-27 14:46:20,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099617219] [2024-01-27 14:46:20,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:46:20,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 14:46:20,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:46:20,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 14:46:20,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-01-27 14:46:20,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 14:46:20,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 31 transitions, 132 flow. Second operand has 20 states, 20 states have (on average 19.05) internal successors, (381), 20 states have internal predecessors, (381), 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) [2024-01-27 14:46:20,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:46:20,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 14:46:20,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:46:20,395 INFO L124 PetriNetUnfolderBase]: 19/69 cut-off events. [2024-01-27 14:46:20,395 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-01-27 14:46:20,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 69 events. 19/69 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 7 based on Foata normal form. 2/69 useless extension candidates. Maximal degree in co-relation 205. Up to 33 conditions per place. [2024-01-27 14:46:20,396 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 25 selfloop transitions, 8 changer transitions 1/40 dead transitions. [2024-01-27 14:46:20,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 40 transitions, 234 flow [2024-01-27 14:46:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 14:46:20,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 14:46:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-01-27 14:46:20,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375375375375375 [2024-01-27 14:46:20,397 INFO L175 Difference]: Start difference. First operand has 47 places, 31 transitions, 132 flow. Second operand 9 states and 179 transitions. [2024-01-27 14:46:20,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 40 transitions, 234 flow [2024-01-27 14:46:20,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 40 transitions, 216 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-01-27 14:46:20,399 INFO L231 Difference]: Finished difference. Result has 52 places, 33 transitions, 156 flow [2024-01-27 14:46:20,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=156, PETRI_PLACES=52, PETRI_TRANSITIONS=33} [2024-01-27 14:46:20,400 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2024-01-27 14:46:20,400 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 33 transitions, 156 flow [2024-01-27 14:46:20,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.05) internal successors, (381), 20 states have internal predecessors, (381), 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) [2024-01-27 14:46:20,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:46:20,401 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:46:20,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 14:46:20,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:46:20,612 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 14:46:20,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:46:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash 780411099, now seen corresponding path program 4 times [2024-01-27 14:46:20,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:46:20,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080336895] [2024-01-27 14:46:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:20,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:46:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:20,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:46:20,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080336895] [2024-01-27 14:46:20,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080336895] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:46:20,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786744570] [2024-01-27 14:46:20,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 14:46:20,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:46:20,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:46:20,819 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) [2024-01-27 14:46:20,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 14:46:20,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 14:46:20,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:46:20,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 14:46:20,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:46:21,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 14:46:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:21,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:46:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:21,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786744570] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:46:21,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:46:21,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-01-27 14:46:21,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122647193] [2024-01-27 14:46:21,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:46:21,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 14:46:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:46:21,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 14:46:21,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-01-27 14:46:21,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 14:46:21,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 33 transitions, 156 flow. Second operand has 23 states, 23 states have (on average 18.91304347826087) internal successors, (435), 23 states have internal predecessors, (435), 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) [2024-01-27 14:46:21,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:46:21,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 14:46:21,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:46:21,527 INFO L124 PetriNetUnfolderBase]: 21/75 cut-off events. [2024-01-27 14:46:21,527 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-01-27 14:46:21,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 75 events. 21/75 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 7 based on Foata normal form. 2/75 useless extension candidates. Maximal degree in co-relation 243. Up to 33 conditions per place. [2024-01-27 14:46:21,530 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 27 selfloop transitions, 9 changer transitions 1/43 dead transitions. [2024-01-27 14:46:21,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 43 transitions, 272 flow [2024-01-27 14:46:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 14:46:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 14:46:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-01-27 14:46:21,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351351351351351 [2024-01-27 14:46:21,532 INFO L175 Difference]: Start difference. First operand has 52 places, 33 transitions, 156 flow. Second operand 10 states and 198 transitions. [2024-01-27 14:46:21,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 43 transitions, 272 flow [2024-01-27 14:46:21,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 43 transitions, 248 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-01-27 14:46:21,536 INFO L231 Difference]: Finished difference. Result has 57 places, 35 transitions, 180 flow [2024-01-27 14:46:21,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=180, PETRI_PLACES=57, PETRI_TRANSITIONS=35} [2024-01-27 14:46:21,537 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2024-01-27 14:46:21,537 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 35 transitions, 180 flow [2024-01-27 14:46:21,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.91304347826087) internal successors, (435), 23 states have internal predecessors, (435), 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) [2024-01-27 14:46:21,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:46:21,538 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:46:21,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 14:46:21,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:46:21,752 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 14:46:21,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:46:21,753 INFO L85 PathProgramCache]: Analyzing trace with hash 376868760, now seen corresponding path program 5 times [2024-01-27 14:46:21,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:46:21,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623656062] [2024-01-27 14:46:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:21,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:46:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:22,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:46:22,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623656062] [2024-01-27 14:46:22,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623656062] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:46:22,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508933044] [2024-01-27 14:46:22,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 14:46:22,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:46:22,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:46:22,071 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) [2024-01-27 14:46:22,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 14:46:22,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-01-27 14:46:22,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:46:22,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 14:46:22,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:46:22,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 14:46:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:22,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:46:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:22,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508933044] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:46:22,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:46:22,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-01-27 14:46:22,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186199770] [2024-01-27 14:46:22,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:46:22,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 14:46:22,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:46:22,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 14:46:22,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-01-27 14:46:22,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 14:46:22,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 35 transitions, 180 flow. Second operand has 26 states, 26 states have (on average 18.807692307692307) internal successors, (489), 26 states have internal predecessors, (489), 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) [2024-01-27 14:46:22,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:46:22,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 14:46:22,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:46:22,917 INFO L124 PetriNetUnfolderBase]: 23/81 cut-off events. [2024-01-27 14:46:22,918 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-01-27 14:46:22,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 81 events. 23/81 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 7 based on Foata normal form. 2/81 useless extension candidates. Maximal degree in co-relation 281. Up to 33 conditions per place. [2024-01-27 14:46:22,918 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 29 selfloop transitions, 10 changer transitions 1/46 dead transitions. [2024-01-27 14:46:22,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 46 transitions, 310 flow [2024-01-27 14:46:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 14:46:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 14:46:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-01-27 14:46:22,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331695331695332 [2024-01-27 14:46:22,929 INFO L175 Difference]: Start difference. First operand has 57 places, 35 transitions, 180 flow. Second operand 11 states and 217 transitions. [2024-01-27 14:46:22,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 46 transitions, 310 flow [2024-01-27 14:46:22,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 46 transitions, 280 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-01-27 14:46:22,931 INFO L231 Difference]: Finished difference. Result has 62 places, 37 transitions, 204 flow [2024-01-27 14:46:22,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=204, PETRI_PLACES=62, PETRI_TRANSITIONS=37} [2024-01-27 14:46:22,931 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2024-01-27 14:46:22,931 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 37 transitions, 204 flow [2024-01-27 14:46:22,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.807692307692307) internal successors, (489), 26 states have internal predecessors, (489), 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) [2024-01-27 14:46:22,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:46:22,932 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:46:22,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 14:46:23,132 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,SelfDestructingSolverStorable9 [2024-01-27 14:46:23,133 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 14:46:23,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:46:23,133 INFO L85 PathProgramCache]: Analyzing trace with hash -880262379, now seen corresponding path program 6 times [2024-01-27 14:46:23,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:46:23,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723283844] [2024-01-27 14:46:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:23,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:46:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:23,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:46:23,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723283844] [2024-01-27 14:46:23,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723283844] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:46:23,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213975857] [2024-01-27 14:46:23,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 14:46:23,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:46:23,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:46:23,400 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) [2024-01-27 14:46:23,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 14:46:23,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-01-27 14:46:23,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:46:23,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 14:46:23,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:46:23,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 14:46:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:23,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:46:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:23,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213975857] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:46:23,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:46:23,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-01-27 14:46:23,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447732638] [2024-01-27 14:46:23,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:46:23,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 14:46:23,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:46:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 14:46:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-01-27 14:46:23,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-27 14:46:23,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 37 transitions, 204 flow. Second operand has 29 states, 29 states have (on average 18.724137931034484) internal successors, (543), 29 states have internal predecessors, (543), 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) [2024-01-27 14:46:23,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:46:23,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-27 14:46:23,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:46:24,243 INFO L124 PetriNetUnfolderBase]: 25/87 cut-off events. [2024-01-27 14:46:24,243 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-01-27 14:46:24,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 87 events. 25/87 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 7 based on Foata normal form. 2/87 useless extension candidates. Maximal degree in co-relation 319. Up to 33 conditions per place. [2024-01-27 14:46:24,244 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 31 selfloop transitions, 11 changer transitions 1/49 dead transitions. [2024-01-27 14:46:24,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 49 transitions, 348 flow [2024-01-27 14:46:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 14:46:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 14:46:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-01-27 14:46:24,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5315315315315315 [2024-01-27 14:46:24,246 INFO L175 Difference]: Start difference. First operand has 62 places, 37 transitions, 204 flow. Second operand 12 states and 236 transitions. [2024-01-27 14:46:24,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 49 transitions, 348 flow [2024-01-27 14:46:24,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 49 transitions, 312 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-01-27 14:46:24,249 INFO L231 Difference]: Finished difference. Result has 67 places, 39 transitions, 228 flow [2024-01-27 14:46:24,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=228, PETRI_PLACES=67, PETRI_TRANSITIONS=39} [2024-01-27 14:46:24,249 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 31 predicate places. [2024-01-27 14:46:24,249 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 39 transitions, 228 flow [2024-01-27 14:46:24,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 18.724137931034484) internal successors, (543), 29 states have internal predecessors, (543), 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) [2024-01-27 14:46:24,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:46:24,250 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:46:24,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 14:46:24,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:46:24,462 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-27 14:46:24,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:46:24,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2097476782, now seen corresponding path program 7 times [2024-01-27 14:46:24,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:46:24,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948994436] [2024-01-27 14:46:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:46:24,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:46:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:25,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:46:25,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948994436] [2024-01-27 14:46:25,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948994436] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:46:25,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115609416] [2024-01-27 14:46:25,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 14:46:25,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:46:25,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:46:25,612 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) [2024-01-27 14:46:25,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 14:46:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:46:25,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 44 conjunts are in the unsatisfiable core [2024-01-27 14:46:25,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:46:25,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-01-27 14:46:25,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 14:46:25,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 14:46:25,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 14:46:25,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 14:46:25,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 14:46:25,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 14:46:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 14:46:25,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 14:46:25,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 14:46:25,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 14:46:26,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 14:46:26,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 14:46:26,051 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2024-01-27 14:46:26,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-01-27 14:46:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:46:26,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:49:33,184 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_85| Int)) (or (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_85| (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1| 1)) (forall ((v_ArrVal_335 Int) (v_ArrVal_334 Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_84| Int) (v_ArrVal_332 Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_83| Int) (v_ArrVal_329 Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_82| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_81| Int) (v_ArrVal_337 Int)) (or (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_83| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_84| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_84| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_85| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_81| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_82| 1)) (= 66 (select (select (store |c_#memory_int#4| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| (store (store (store (store (store (select |c_#memory_int#4| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base|) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_85| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_329) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_84| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_332) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_83| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_334) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_82| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_335) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_81| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_337)) c_~v~0.base) c_~v~0.offset)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_82| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_83| 1)))))) is different from false [2024-01-27 14:54:38,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105021418 treesize of output 104955882 [2024-01-27 14:55:22,680 WARN L293 SmtUtils]: Spent 43.80s on a formula simplification. DAG size of input: 6615 DAG size of output: 453 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 14:55:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 19 refuted. 16 times theorem prover too weak. 0 trivial. 7 not checked. [2024-01-27 14:55:30,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115609416] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:55:30,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:55:30,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 40 [2024-01-27 14:55:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121657233] [2024-01-27 14:55:30,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:55:30,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-01-27 14:55:30,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:55:30,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-01-27 14:55:30,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1096, Unknown=113, NotChecked=76, Total=1640 [2024-01-27 14:55:34,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 14:55:38,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 14:55:42,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 14:55:42,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-27 14:55:42,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 39 transitions, 228 flow. Second operand has 41 states, 41 states have (on average 14.78048780487805) internal successors, (606), 41 states have internal predecessors, (606), 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) [2024-01-27 14:55:42,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:55:42,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-27 14:55:42,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:55:48,130 INFO L124 PetriNetUnfolderBase]: 23/83 cut-off events. [2024-01-27 14:55:48,130 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2024-01-27 14:55:48,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 83 events. 23/83 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 2 based on Foata normal form. 1/82 useless extension candidates. Maximal degree in co-relation 307. Up to 20 conditions per place. [2024-01-27 14:55:48,131 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 0 selfloop transitions, 0 changer transitions 47/47 dead transitions. [2024-01-27 14:55:48,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 47 transitions, 328 flow [2024-01-27 14:55:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 14:55:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 14:55:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 224 transitions. [2024-01-27 14:55:48,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2024-01-27 14:55:48,132 INFO L175 Difference]: Start difference. First operand has 67 places, 39 transitions, 228 flow. Second operand 14 states and 224 transitions. [2024-01-27 14:55:48,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 47 transitions, 328 flow [2024-01-27 14:55:48,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 47 transitions, 286 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-01-27 14:55:48,134 INFO L231 Difference]: Finished difference. Result has 69 places, 0 transitions, 0 flow [2024-01-27 14:55:48,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=69, PETRI_TRANSITIONS=0} [2024-01-27 14:55:48,134 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2024-01-27 14:55:48,135 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 0 transitions, 0 flow [2024-01-27 14:55:48,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 14.78048780487805) internal successors, (606), 41 states have internal predecessors, (606), 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) [2024-01-27 14:55:48,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 14 remaining) [2024-01-27 14:55:48,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 14 remaining) [2024-01-27 14:55:48,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 14 remaining) [2024-01-27 14:55:48,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 14 remaining) [2024-01-27 14:55:48,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 14 remaining) [2024-01-27 14:55:48,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 14 remaining) [2024-01-27 14:55:48,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (7 of 14 remaining) [2024-01-27 14:55:48,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 14 remaining) [2024-01-27 14:55:48,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2024-01-27 14:55:48,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 14 remaining) [2024-01-27 14:55:48,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 14 remaining) [2024-01-27 14:55:48,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 14 remaining) [2024-01-27 14:55:48,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 14 remaining) [2024-01-27 14:55:48,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 14 remaining) [2024-01-27 14:55:48,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 14:55:48,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:55:48,339 INFO L445 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1, 1, 1] [2024-01-27 14:55:48,343 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-27 14:55:48,355 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-27 14:55:48,359 INFO L503 ceAbstractionStarter]: Automizer considered 6 witness invariants [2024-01-27 14:55:48,359 INFO L504 ceAbstractionStarter]: WitnessConsidered=6 [2024-01-27 14:55:48,361 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 02:55:48 BasicIcfg [2024-01-27 14:55:48,361 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-27 14:55:48,361 INFO L158 Benchmark]: Toolchain (without parser) took 572775.76ms. Allocated memory was 153.1MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 92.3MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 141.9MB. Max. memory is 16.1GB. [2024-01-27 14:55:48,361 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 153.1MB. Free memory was 113.9MB in the beginning and 113.9MB in the end (delta: 85.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 14:55:48,362 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 153.1MB. Free memory is still 95.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 14:55:48,362 INFO L158 Benchmark]: CACSL2BoogieTranslator took 573.02ms. Allocated memory was 153.1MB in the beginning and 211.8MB in the end (delta: 58.7MB). Free memory was 92.0MB in the beginning and 174.8MB in the end (delta: -82.9MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. [2024-01-27 14:55:48,362 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.28ms. Allocated memory is still 211.8MB. Free memory was 174.8MB in the beginning and 172.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 14:55:48,362 INFO L158 Benchmark]: Boogie Preprocessor took 37.49ms. Allocated memory is still 211.8MB. Free memory was 171.7MB in the beginning and 169.4MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-01-27 14:55:48,363 INFO L158 Benchmark]: RCFGBuilder took 453.38ms. Allocated memory is still 211.8MB. Free memory was 169.4MB in the beginning and 142.3MB in the end (delta: 27.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-01-27 14:55:48,363 INFO L158 Benchmark]: TraceAbstraction took 571660.31ms. Allocated memory was 211.8MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 142.3MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 132.7MB. Max. memory is 16.1GB. [2024-01-27 14:55:48,366 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 153.1MB. Free memory was 113.9MB in the beginning and 113.9MB in the end (delta: 85.7kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 153.1MB. Free memory is still 95.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 573.02ms. Allocated memory was 153.1MB in the beginning and 211.8MB in the end (delta: 58.7MB). Free memory was 92.0MB in the beginning and 174.8MB in the end (delta: -82.9MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.28ms. Allocated memory is still 211.8MB. Free memory was 174.8MB in the beginning and 172.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.49ms. Allocated memory is still 211.8MB. Free memory was 171.7MB in the beginning and 169.4MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 453.38ms. Allocated memory is still 211.8MB. Free memory was 169.4MB in the beginning and 142.3MB in the end (delta: 27.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 571660.31ms. Allocated memory was 211.8MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 142.3MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 132.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1111]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1112]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1116]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1116]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1117]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1122]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1107]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 54 locations, 14 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 571.5s, OverallIterations: 12, TraceHistogramMax: 8, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 19.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 450 SdHoareTripleChecker+Valid, 13.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 426 mSDsluCounter, 389 SdHoareTripleChecker+Invalid, 13.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 34 IncrementalHoareTripleChecker+Unchecked, 370 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2941 IncrementalHoareTripleChecker+Invalid, 2988 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 19 mSDtfsCounter, 2941 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 566 GetRequests, 334 SyntacticMatches, 8 SemanticMatches, 224 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 498.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=228occurred in iteration=11, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 549.3s InterpolantComputationTime, 496 NumberOfCodeBlocks, 496 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 687 ConstructedInterpolants, 14 QuantifiedInterpolants, 6385 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1575 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 26 InterpolantComputations, 5 PerfectInterpolantSequences, 70/504 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-27 14:55:48,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE