./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi005.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/rfi005.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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-wmm/rfi005.i ./goblint.2024-05-21_14-57-05.files/protection/rfi005.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:42:17,775 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:42:17,839 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:42:17,844 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:42:17,845 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:42:17,877 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:42:17,877 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:42:17,878 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:42:17,878 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:42:17,881 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:42:17,881 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:42:17,881 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:42:17,888 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:42:17,889 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:42:17,889 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:42:17,890 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:42:17,890 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:42:17,890 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:42:17,890 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:42:17,890 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:42:17,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:42:17,891 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:42:17,891 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:42:17,891 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:42:17,891 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:42:17,892 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:42:17,892 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:42:17,892 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:42:17,892 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:42:17,893 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:42:17,893 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:42:17,894 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:42:17,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:42:17,894 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:42:17,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:42:17,894 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:42:17,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:42:17,895 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:42:17,895 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:42:17,895 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:42:17,895 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:42:17,896 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:42:17,896 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:42:17,896 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:42:18,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:42:18,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:42:18,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:42:18,113 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:42:18,114 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:42:18,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi005.i [2024-06-14 12:42:19,141 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:42:19,303 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:42:19,303 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi005.i [2024-06-14 12:42:19,317 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d95416c6f/a2e96692bd02449390e71e04f38fb70f/FLAG5aaf6ab57 [2024-06-14 12:42:19,327 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d95416c6f/a2e96692bd02449390e71e04f38fb70f [2024-06-14 12:42:19,329 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:42:19,329 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:42:19,330 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/rfi005.yml/witness.yml [2024-06-14 12:42:19,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:42:19,415 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:42:19,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:42:19,416 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:42:19,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:42:19,420 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:42:19" (1/2) ... [2024-06-14 12:42:19,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3689ada5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:19, skipping insertion in model container [2024-06-14 12:42:19,421 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:42:19" (1/2) ... [2024-06-14 12:42:19,422 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9d7178d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:19, skipping insertion in model container [2024-06-14 12:42:19,422 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:42:19" (2/2) ... [2024-06-14 12:42:19,422 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3689ada5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:19, skipping insertion in model container [2024-06-14 12:42:19,422 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:42:19" (2/2) ... [2024-06-14 12:42:19,422 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:42:19,464 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:42:19,465 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && ((y$w_buff0 == 0 || y$w_buff0 == 1) || y$w_buff0 == 2)))) && (! multithreaded || (((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && ((y$w_buff1 == 0 || y$w_buff1 == 1) || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) [2024-06-14 12:42:19,465 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && ((y$w_buff0 == 0 || y$w_buff0 == 1) || y$w_buff0 == 2)))) && (! multithreaded || (((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && ((y$w_buff1 == 0 || y$w_buff1 == 1) || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) [2024-06-14 12:42:19,465 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:42:19,465 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-14 12:42:19,546 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:42:19,856 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:42:19,869 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:42:19,996 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:42:20,036 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:42:20,036 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:20 WrapperNode [2024-06-14 12:42:20,037 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:42:20,038 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:42:20,038 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:42:20,038 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:42:20,043 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 14.06 12:42:20" (1/1) ... [2024-06-14 12:42:20,067 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 14.06 12:42:20" (1/1) ... [2024-06-14 12:42:20,103 INFO L138 Inliner]: procedures = 174, calls = 41, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 174 [2024-06-14 12:42:20,104 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:42:20,104 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:42:20,105 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:42:20,105 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:42:20,117 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:20" (1/1) ... [2024-06-14 12:42:20,118 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:20" (1/1) ... [2024-06-14 12:42:20,132 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:20" (1/1) ... [2024-06-14 12:42:20,150 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:42:20,155 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:20" (1/1) ... [2024-06-14 12:42:20,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:20" (1/1) ... [2024-06-14 12:42:20,161 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:20" (1/1) ... [2024-06-14 12:42:20,172 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:20" (1/1) ... [2024-06-14 12:42:20,174 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:20" (1/1) ... [2024-06-14 12:42:20,180 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:20" (1/1) ... [2024-06-14 12:42:20,182 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:42:20,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:42:20,185 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:42:20,185 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:42:20,186 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:20" (1/1) ... [2024-06-14 12:42:20,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:42:20,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:42:20,207 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) [2024-06-14 12:42:20,218 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 [2024-06-14 12:42:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:42:20,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:42:20,241 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:42:20,241 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:42:20,241 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:42:20,241 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:42:20,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:42:20,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:42:20,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:42:20,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:42:20,242 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:42:20,365 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:42:20,367 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:42:20,705 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:42:20,705 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:42:20,874 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:42:20,875 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:42:20,875 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:42:20 BoogieIcfgContainer [2024-06-14 12:42:20,875 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:42:20,877 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:42:20,877 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:42:20,879 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:42:20,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:42:19" (1/4) ... [2024-06-14 12:42:20,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3438a88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:42:20, skipping insertion in model container [2024-06-14 12:42:20,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:42:19" (2/4) ... [2024-06-14 12:42:20,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3438a88f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:42:20, skipping insertion in model container [2024-06-14 12:42:20,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:20" (3/4) ... [2024-06-14 12:42:20,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3438a88f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:42:20, skipping insertion in model container [2024-06-14 12:42:20,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:42:20" (4/4) ... [2024-06-14 12:42:20,882 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi005.i [2024-06-14 12:42:20,895 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:42:20,896 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-14 12:42:20,896 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:42:20,929 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:42:20,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 33 transitions, 74 flow [2024-06-14 12:42:20,970 INFO L124 PetriNetUnfolderBase]: 0/31 cut-off events. [2024-06-14 12:42:20,971 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:42:20,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 31 events. 0/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:42:20,972 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 33 transitions, 74 flow [2024-06-14 12:42:20,974 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 25 transitions, 56 flow [2024-06-14 12:42:20,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:42:20,985 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;@33f59fd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:42:20,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-14 12:42:20,987 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:42:20,988 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:42:20,988 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:42:20,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:20,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:42:20,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:20,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:20,992 INFO L85 PathProgramCache]: Analyzing trace with hash 865260380, now seen corresponding path program 1 times [2024-06-14 12:42:20,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:20,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419963923] [2024-06-14 12:42:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:20,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:21,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:21,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419963923] [2024-06-14 12:42:21,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419963923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:21,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:21,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:42:21,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46045802] [2024-06-14 12:42:21,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:21,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:42:21,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:42:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:42:21,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-14 12:42:21,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-06-14 12:42:21,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:21,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-14 12:42:21,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:22,060 INFO L124 PetriNetUnfolderBase]: 153/306 cut-off events. [2024-06-14 12:42:22,060 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-14 12:42:22,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 306 events. 153/306 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1219 event pairs, 89 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 587. Up to 272 conditions per place. [2024-06-14 12:42:22,066 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2024-06-14 12:42:22,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 123 flow [2024-06-14 12:42:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:42:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:42:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-06-14 12:42:22,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 12:42:22,078 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 56 flow. Second operand 3 states and 55 transitions. [2024-06-14 12:42:22,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 123 flow [2024-06-14 12:42:22,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 12:42:22,082 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 75 flow [2024-06-14 12:42:22,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-06-14 12:42:22,087 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2024-06-14 12:42:22,087 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 75 flow [2024-06-14 12:42:22,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-06-14 12:42:22,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:22,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:22,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:42:22,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:22,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:22,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1708396933, now seen corresponding path program 1 times [2024-06-14 12:42:22,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:22,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054760834] [2024-06-14 12:42:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:22,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:22,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:22,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054760834] [2024-06-14 12:42:22,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054760834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:22,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:22,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:42:22,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989513980] [2024-06-14 12:42:22,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:22,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:42:22,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:22,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:42:22,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:42:22,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-06-14 12:42:22,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-06-14 12:42:22,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:22,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-06-14 12:42:22,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:22,859 INFO L124 PetriNetUnfolderBase]: 169/318 cut-off events. [2024-06-14 12:42:22,860 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-06-14 12:42:22,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 318 events. 169/318 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1201 event pairs, 70 based on Foata normal form. 4/322 useless extension candidates. Maximal degree in co-relation 710. Up to 281 conditions per place. [2024-06-14 12:42:22,865 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 29 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2024-06-14 12:42:22,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 171 flow [2024-06-14 12:42:22,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:42:22,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:42:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-06-14 12:42:22,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-06-14 12:42:22,868 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 75 flow. Second operand 4 states and 68 transitions. [2024-06-14 12:42:22,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 171 flow [2024-06-14 12:42:22,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:42:22,872 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 99 flow [2024-06-14 12:42:22,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=99, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-06-14 12:42:22,873 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2024-06-14 12:42:22,874 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 99 flow [2024-06-14 12:42:22,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-06-14 12:42:22,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:22,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:22,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:42:22,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:22,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:22,878 INFO L85 PathProgramCache]: Analyzing trace with hash -19449273, now seen corresponding path program 1 times [2024-06-14 12:42:22,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:22,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148010302] [2024-06-14 12:42:22,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:22,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:23,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:23,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148010302] [2024-06-14 12:42:23,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148010302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:23,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:23,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:42:23,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240785635] [2024-06-14 12:42:23,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:23,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:42:23,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:42:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:42:23,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-06-14 12:42:23,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 99 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:23,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:23,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-06-14 12:42:23,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:23,688 INFO L124 PetriNetUnfolderBase]: 145/284 cut-off events. [2024-06-14 12:42:23,689 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2024-06-14 12:42:23,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 284 events. 145/284 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1091 event pairs, 76 based on Foata normal form. 1/282 useless extension candidates. Maximal degree in co-relation 701. Up to 256 conditions per place. [2024-06-14 12:42:23,690 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 25 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2024-06-14 12:42:23,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 179 flow [2024-06-14 12:42:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:42:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:42:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-06-14 12:42:23,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 12:42:23,692 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 99 flow. Second operand 5 states and 70 transitions. [2024-06-14 12:42:23,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 179 flow [2024-06-14 12:42:23,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 170 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 12:42:23,693 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 117 flow [2024-06-14 12:42:23,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2024-06-14 12:42:23,694 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2024-06-14 12:42:23,694 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 117 flow [2024-06-14 12:42:23,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:23,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:23,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:23,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:42:23,695 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:23,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:23,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2049103687, now seen corresponding path program 1 times [2024-06-14 12:42:23,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:23,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856803372] [2024-06-14 12:42:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:23,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:24,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:24,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856803372] [2024-06-14 12:42:24,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856803372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:24,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:24,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:42:24,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109497292] [2024-06-14 12:42:24,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:24,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:42:24,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:24,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:42:24,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:42:24,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-06-14 12:42:24,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) [2024-06-14 12:42:24,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:24,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-06-14 12:42:24,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:24,812 INFO L124 PetriNetUnfolderBase]: 163/307 cut-off events. [2024-06-14 12:42:24,813 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2024-06-14 12:42:24,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 307 events. 163/307 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1160 event pairs, 29 based on Foata normal form. 4/311 useless extension candidates. Maximal degree in co-relation 821. Up to 252 conditions per place. [2024-06-14 12:42:24,814 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 34 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2024-06-14 12:42:24,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 235 flow [2024-06-14 12:42:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:42:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:42:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-14 12:42:24,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:42:24,816 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 117 flow. Second operand 6 states and 90 transitions. [2024-06-14 12:42:24,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 235 flow [2024-06-14 12:42:24,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 224 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 12:42:24,818 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 131 flow [2024-06-14 12:42:24,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=131, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2024-06-14 12:42:24,818 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 10 predicate places. [2024-06-14 12:42:24,818 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 131 flow [2024-06-14 12:42:24,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) [2024-06-14 12:42:24,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:24,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:24,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:42:24,819 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:24,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:24,820 INFO L85 PathProgramCache]: Analyzing trace with hash -602926624, now seen corresponding path program 1 times [2024-06-14 12:42:24,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:24,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779299973] [2024-06-14 12:42:24,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:24,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:24,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:24,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779299973] [2024-06-14 12:42:24,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779299973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:24,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:24,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:42:24,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806710714] [2024-06-14 12:42:24,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:24,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:42:24,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:24,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:42:24,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:42:24,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 33 [2024-06-14 12:42:24,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-06-14 12:42:24,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:24,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 33 [2024-06-14 12:42:24,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:24,905 INFO L124 PetriNetUnfolderBase]: 46/132 cut-off events. [2024-06-14 12:42:24,906 INFO L125 PetriNetUnfolderBase]: For 134/139 co-relation queries the response was YES. [2024-06-14 12:42:24,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 132 events. 46/132 cut-off events. For 134/139 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 507 event pairs, 29 based on Foata normal form. 18/143 useless extension candidates. Maximal degree in co-relation 326. Up to 67 conditions per place. [2024-06-14 12:42:24,907 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 14 selfloop transitions, 7 changer transitions 0/32 dead transitions. [2024-06-14 12:42:24,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 32 transitions, 167 flow [2024-06-14 12:42:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:42:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:42:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-06-14 12:42:24,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6161616161616161 [2024-06-14 12:42:24,908 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 131 flow. Second operand 3 states and 61 transitions. [2024-06-14 12:42:24,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 32 transitions, 167 flow [2024-06-14 12:42:24,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 151 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 12:42:24,909 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 119 flow [2024-06-14 12:42:24,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2024-06-14 12:42:24,910 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 9 predicate places. [2024-06-14 12:42:24,910 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 119 flow [2024-06-14 12:42:24,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-06-14 12:42:24,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:24,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:24,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:42:24,911 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:24,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:24,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2112501718, now seen corresponding path program 1 times [2024-06-14 12:42:24,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:24,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320201043] [2024-06-14 12:42:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:24,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:25,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:25,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320201043] [2024-06-14 12:42:25,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320201043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:25,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:25,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:42:25,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922395243] [2024-06-14 12:42:25,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:25,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:42:25,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:25,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:42:25,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:42:25,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-14 12:42:25,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 119 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2024-06-14 12:42:25,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:25,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-14 12:42:25,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:25,685 INFO L124 PetriNetUnfolderBase]: 111/238 cut-off events. [2024-06-14 12:42:25,685 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-06-14 12:42:25,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 238 events. 111/238 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 838 event pairs, 52 based on Foata normal form. 2/240 useless extension candidates. Maximal degree in co-relation 683. Up to 198 conditions per place. [2024-06-14 12:42:25,687 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 30 selfloop transitions, 8 changer transitions 0/42 dead transitions. [2024-06-14 12:42:25,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 233 flow [2024-06-14 12:42:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:42:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:42:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2024-06-14 12:42:25,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-14 12:42:25,690 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 119 flow. Second operand 6 states and 79 transitions. [2024-06-14 12:42:25,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 233 flow [2024-06-14 12:42:25,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 226 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 12:42:25,694 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 149 flow [2024-06-14 12:42:25,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2024-06-14 12:42:25,696 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2024-06-14 12:42:25,696 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 149 flow [2024-06-14 12:42:25,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2024-06-14 12:42:25,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:25,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:25,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:42:25,697 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:25,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:25,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1510864218, now seen corresponding path program 2 times [2024-06-14 12:42:25,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:25,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063724226] [2024-06-14 12:42:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:25,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:26,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063724226] [2024-06-14 12:42:26,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063724226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:26,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:26,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:42:26,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647616695] [2024-06-14 12:42:26,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:26,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:42:26,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:26,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:42:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:42:26,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-14 12:42:26,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 149 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2024-06-14 12:42:26,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:26,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-14 12:42:26,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:26,416 INFO L124 PetriNetUnfolderBase]: 108/230 cut-off events. [2024-06-14 12:42:26,416 INFO L125 PetriNetUnfolderBase]: For 540/540 co-relation queries the response was YES. [2024-06-14 12:42:26,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 230 events. 108/230 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 792 event pairs, 55 based on Foata normal form. 2/231 useless extension candidates. Maximal degree in co-relation 722. Up to 184 conditions per place. [2024-06-14 12:42:26,418 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 27 selfloop transitions, 10 changer transitions 0/41 dead transitions. [2024-06-14 12:42:26,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 41 transitions, 255 flow [2024-06-14 12:42:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:42:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:42:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-06-14 12:42:26,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 12:42:26,419 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 149 flow. Second operand 6 states and 77 transitions. [2024-06-14 12:42:26,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 41 transitions, 255 flow [2024-06-14 12:42:26,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 238 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:42:26,421 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 175 flow [2024-06-14 12:42:26,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=175, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2024-06-14 12:42:26,421 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2024-06-14 12:42:26,422 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 175 flow [2024-06-14 12:42:26,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2024-06-14 12:42:26,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:26,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:26,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:42:26,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:26,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:26,423 INFO L85 PathProgramCache]: Analyzing trace with hash -487217291, now seen corresponding path program 1 times [2024-06-14 12:42:26,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:26,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490439108] [2024-06-14 12:42:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:26,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:27,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:27,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490439108] [2024-06-14 12:42:27,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490439108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:27,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:27,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:42:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314084263] [2024-06-14 12:42:27,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:27,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:42:27,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:27,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:42:27,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:42:27,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-14 12:42:27,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 175 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:27,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:27,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-14 12:42:27,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:27,430 INFO L124 PetriNetUnfolderBase]: 121/262 cut-off events. [2024-06-14 12:42:27,430 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2024-06-14 12:42:27,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 262 events. 121/262 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 966 event pairs, 51 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 877. Up to 202 conditions per place. [2024-06-14 12:42:27,432 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 35 selfloop transitions, 15 changer transitions 0/54 dead transitions. [2024-06-14 12:42:27,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 357 flow [2024-06-14 12:42:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:42:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:42:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-14 12:42:27,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38257575757575757 [2024-06-14 12:42:27,434 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 175 flow. Second operand 8 states and 101 transitions. [2024-06-14 12:42:27,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 357 flow [2024-06-14 12:42:27,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 328 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 12:42:27,436 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 246 flow [2024-06-14 12:42:27,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=246, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2024-06-14 12:42:27,437 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2024-06-14 12:42:27,437 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 246 flow [2024-06-14 12:42:27,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:27,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:27,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:27,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:42:27,438 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:27,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:27,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1410121675, now seen corresponding path program 2 times [2024-06-14 12:42:27,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:27,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651032957] [2024-06-14 12:42:27,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:27,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:28,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:28,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651032957] [2024-06-14 12:42:28,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651032957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:28,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:28,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:42:28,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814584472] [2024-06-14 12:42:28,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:28,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:42:28,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:28,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:42:28,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:42:28,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-14 12:42:28,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 246 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:28,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:28,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-14 12:42:28,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:28,390 INFO L124 PetriNetUnfolderBase]: 120/260 cut-off events. [2024-06-14 12:42:28,390 INFO L125 PetriNetUnfolderBase]: For 1000/1000 co-relation queries the response was YES. [2024-06-14 12:42:28,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 260 events. 120/260 cut-off events. For 1000/1000 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 955 event pairs, 51 based on Foata normal form. 1/261 useless extension candidates. Maximal degree in co-relation 942. Up to 195 conditions per place. [2024-06-14 12:42:28,392 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 35 selfloop transitions, 16 changer transitions 0/55 dead transitions. [2024-06-14 12:42:28,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 394 flow [2024-06-14 12:42:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:42:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:42:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-06-14 12:42:28,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-14 12:42:28,393 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 246 flow. Second operand 7 states and 90 transitions. [2024-06-14 12:42:28,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 394 flow [2024-06-14 12:42:28,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 373 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 12:42:28,396 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 276 flow [2024-06-14 12:42:28,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=276, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2024-06-14 12:42:28,397 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 26 predicate places. [2024-06-14 12:42:28,397 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 276 flow [2024-06-14 12:42:28,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:28,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:28,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:28,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:42:28,398 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:28,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:28,398 INFO L85 PathProgramCache]: Analyzing trace with hash -616488526, now seen corresponding path program 1 times [2024-06-14 12:42:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:28,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585519221] [2024-06-14 12:42:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:28,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:28,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:28,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585519221] [2024-06-14 12:42:28,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585519221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:28,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:28,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:42:28,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840814730] [2024-06-14 12:42:28,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:28,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:42:28,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:28,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:42:28,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:42:28,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 33 [2024-06-14 12:42:28,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 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) [2024-06-14 12:42:28,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:28,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 33 [2024-06-14 12:42:28,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:28,568 INFO L124 PetriNetUnfolderBase]: 35/113 cut-off events. [2024-06-14 12:42:28,569 INFO L125 PetriNetUnfolderBase]: For 435/438 co-relation queries the response was YES. [2024-06-14 12:42:28,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 113 events. 35/113 cut-off events. For 435/438 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 446 event pairs, 10 based on Foata normal form. 10/119 useless extension candidates. Maximal degree in co-relation 368. Up to 38 conditions per place. [2024-06-14 12:42:28,570 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 13 selfloop transitions, 9 changer transitions 0/36 dead transitions. [2024-06-14 12:42:28,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 36 transitions, 278 flow [2024-06-14 12:42:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:42:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:42:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-14 12:42:28,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-14 12:42:28,571 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 276 flow. Second operand 5 states and 80 transitions. [2024-06-14 12:42:28,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 36 transitions, 278 flow [2024-06-14 12:42:28,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 36 transitions, 235 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:42:28,573 INFO L231 Difference]: Finished difference. Result has 50 places, 34 transitions, 205 flow [2024-06-14 12:42:28,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=50, PETRI_TRANSITIONS=34} [2024-06-14 12:42:28,574 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2024-06-14 12:42:28,575 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 34 transitions, 205 flow [2024-06-14 12:42:28,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 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) [2024-06-14 12:42:28,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:28,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:28,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:42:28,576 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:28,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:28,576 INFO L85 PathProgramCache]: Analyzing trace with hash -276764380, now seen corresponding path program 1 times [2024-06-14 12:42:28,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:28,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9056289] [2024-06-14 12:42:28,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:28,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:29,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:29,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9056289] [2024-06-14 12:42:29,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9056289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:29,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:29,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:29,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895766602] [2024-06-14 12:42:29,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:29,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:29,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:29,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-14 12:42:29,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 34 transitions, 205 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:29,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:29,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-14 12:42:29,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:29,615 INFO L124 PetriNetUnfolderBase]: 52/150 cut-off events. [2024-06-14 12:42:29,615 INFO L125 PetriNetUnfolderBase]: For 360/360 co-relation queries the response was YES. [2024-06-14 12:42:29,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 150 events. 52/150 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 593 event pairs, 1 based on Foata normal form. 2/152 useless extension candidates. Maximal degree in co-relation 484. Up to 52 conditions per place. [2024-06-14 12:42:29,617 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 26 selfloop transitions, 15 changer transitions 8/53 dead transitions. [2024-06-14 12:42:29,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 360 flow [2024-06-14 12:42:29,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-14 12:42:29,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3501683501683502 [2024-06-14 12:42:29,618 INFO L175 Difference]: Start difference. First operand has 50 places, 34 transitions, 205 flow. Second operand 9 states and 104 transitions. [2024-06-14 12:42:29,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 360 flow [2024-06-14 12:42:29,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 53 transitions, 348 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:42:29,620 INFO L231 Difference]: Finished difference. Result has 57 places, 34 transitions, 232 flow [2024-06-14 12:42:29,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=232, PETRI_PLACES=57, PETRI_TRANSITIONS=34} [2024-06-14 12:42:29,620 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 25 predicate places. [2024-06-14 12:42:29,621 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 34 transitions, 232 flow [2024-06-14 12:42:29,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:29,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:29,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:29,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:42:29,621 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:29,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:29,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2079900820, now seen corresponding path program 2 times [2024-06-14 12:42:29,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:29,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876664024] [2024-06-14 12:42:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:29,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:30,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:30,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876664024] [2024-06-14 12:42:30,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876664024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:30,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:30,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:30,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020822045] [2024-06-14 12:42:30,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:30,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:30,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:30,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:30,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:30,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-14 12:42:30,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 34 transitions, 232 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:30,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:30,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-14 12:42:30,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:30,603 INFO L124 PetriNetUnfolderBase]: 45/135 cut-off events. [2024-06-14 12:42:30,604 INFO L125 PetriNetUnfolderBase]: For 520/520 co-relation queries the response was YES. [2024-06-14 12:42:30,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 135 events. 45/135 cut-off events. For 520/520 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 524 event pairs, 2 based on Foata normal form. 2/137 useless extension candidates. Maximal degree in co-relation 487. Up to 48 conditions per place. [2024-06-14 12:42:30,605 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 23 selfloop transitions, 11 changer transitions 10/48 dead transitions. [2024-06-14 12:42:30,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 48 transitions, 358 flow [2024-06-14 12:42:30,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:42:30,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:42:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-14 12:42:30,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-06-14 12:42:30,606 INFO L175 Difference]: Start difference. First operand has 57 places, 34 transitions, 232 flow. Second operand 8 states and 92 transitions. [2024-06-14 12:42:30,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 48 transitions, 358 flow [2024-06-14 12:42:30,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 48 transitions, 326 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 12:42:30,608 INFO L231 Difference]: Finished difference. Result has 56 places, 30 transitions, 191 flow [2024-06-14 12:42:30,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=191, PETRI_PLACES=56, PETRI_TRANSITIONS=30} [2024-06-14 12:42:30,609 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2024-06-14 12:42:30,609 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 30 transitions, 191 flow [2024-06-14 12:42:30,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:30,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:30,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:30,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:42:30,610 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:30,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2079961270, now seen corresponding path program 3 times [2024-06-14 12:42:30,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:30,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035216056] [2024-06-14 12:42:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:30,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:31,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:31,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035216056] [2024-06-14 12:42:31,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035216056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:31,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:31,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:31,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71391372] [2024-06-14 12:42:31,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:31,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:31,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:31,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:31,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:31,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-14 12:42:31,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 30 transitions, 191 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:31,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:31,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-14 12:42:31,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:31,631 INFO L124 PetriNetUnfolderBase]: 28/102 cut-off events. [2024-06-14 12:42:31,632 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2024-06-14 12:42:31,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 102 events. 28/102 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 373 event pairs, 1 based on Foata normal form. 2/104 useless extension candidates. Maximal degree in co-relation 340. Up to 29 conditions per place. [2024-06-14 12:42:31,632 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 17 selfloop transitions, 6 changer transitions 14/41 dead transitions. [2024-06-14 12:42:31,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 41 transitions, 295 flow [2024-06-14 12:42:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:42:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:42:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-14 12:42:31,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-14 12:42:31,633 INFO L175 Difference]: Start difference. First operand has 56 places, 30 transitions, 191 flow. Second operand 8 states and 88 transitions. [2024-06-14 12:42:31,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 41 transitions, 295 flow [2024-06-14 12:42:31,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 41 transitions, 267 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 12:42:31,634 INFO L231 Difference]: Finished difference. Result has 53 places, 23 transitions, 121 flow [2024-06-14 12:42:31,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=121, PETRI_PLACES=53, PETRI_TRANSITIONS=23} [2024-06-14 12:42:31,635 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2024-06-14 12:42:31,635 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 23 transitions, 121 flow [2024-06-14 12:42:31,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:31,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:31,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:31,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:42:31,635 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:31,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1931279212, now seen corresponding path program 4 times [2024-06-14 12:42:31,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:31,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515975350] [2024-06-14 12:42:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:31,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:32,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:32,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515975350] [2024-06-14 12:42:32,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515975350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:32,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:32,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:32,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185217711] [2024-06-14 12:42:32,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:32,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:32,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:32,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:32,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:32,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-14 12:42:32,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 23 transitions, 121 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:32,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:32,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-14 12:42:32,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:32,650 INFO L124 PetriNetUnfolderBase]: 15/65 cut-off events. [2024-06-14 12:42:32,650 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2024-06-14 12:42:32,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 65 events. 15/65 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 1 based on Foata normal form. 2/67 useless extension candidates. Maximal degree in co-relation 206. Up to 19 conditions per place. [2024-06-14 12:42:32,651 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 12 selfloop transitions, 3 changer transitions 13/32 dead transitions. [2024-06-14 12:42:32,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 32 transitions, 198 flow [2024-06-14 12:42:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:42:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:42:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-06-14 12:42:32,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-14 12:42:32,652 INFO L175 Difference]: Start difference. First operand has 53 places, 23 transitions, 121 flow. Second operand 8 states and 84 transitions. [2024-06-14 12:42:32,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 32 transitions, 198 flow [2024-06-14 12:42:32,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 177 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:42:32,653 INFO L231 Difference]: Finished difference. Result has 47 places, 18 transitions, 77 flow [2024-06-14 12:42:32,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=77, PETRI_PLACES=47, PETRI_TRANSITIONS=18} [2024-06-14 12:42:32,654 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2024-06-14 12:42:32,654 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 18 transitions, 77 flow [2024-06-14 12:42:32,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:32,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:32,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:32,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:42:32,655 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 12:42:32,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash -206783340, now seen corresponding path program 5 times [2024-06-14 12:42:32,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:32,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420316325] [2024-06-14 12:42:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:32,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:33,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:33,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420316325] [2024-06-14 12:42:33,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420316325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:33,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:33,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:33,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35725605] [2024-06-14 12:42:33,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:33,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:33,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:33,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:33,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:33,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-14 12:42:33,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 18 transitions, 77 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:33,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:33,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-14 12:42:33,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:33,484 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-06-14 12:42:33,484 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-14 12:42:33,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 29 events. 5/29 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 0 based on Foata normal form. 2/31 useless extension candidates. Maximal degree in co-relation 78. Up to 7 conditions per place. [2024-06-14 12:42:33,484 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2024-06-14 12:42:33,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 21 transitions, 105 flow [2024-06-14 12:42:33,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:42:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:42:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 74 transitions. [2024-06-14 12:42:33,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2803030303030303 [2024-06-14 12:42:33,485 INFO L175 Difference]: Start difference. First operand has 47 places, 18 transitions, 77 flow. Second operand 8 states and 74 transitions. [2024-06-14 12:42:33,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 21 transitions, 105 flow [2024-06-14 12:42:33,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 21 transitions, 83 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 12:42:33,486 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2024-06-14 12:42:33,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2024-06-14 12:42:33,486 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2024-06-14 12:42:33,486 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2024-06-14 12:42:33,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:33,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-14 12:42:33,489 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-14 12:42:33,489 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-14 12:42:33,489 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-14 12:42:33,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:42:33,489 INFO L445 BasicCegarLoop]: Path program histogram: [5, 2, 2, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:33,491 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-14 12:42:33,492 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-14 12:42:33,494 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-14 12:42:33,494 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-14 12:42:33,495 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.06 12:42:33 BasicIcfg [2024-06-14 12:42:33,495 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-14 12:42:33,495 INFO L158 Benchmark]: Toolchain (without parser) took 14080.63ms. Allocated memory was 182.5MB in the beginning and 549.5MB in the end (delta: 367.0MB). Free memory was 106.7MB in the beginning and 348.4MB in the end (delta: -241.8MB). Peak memory consumption was 126.9MB. Max. memory is 16.1GB. [2024-06-14 12:42:33,496 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 119.5MB. Free memory is still 86.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 12:42:33,496 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 182.5MB. Free memory is still 112.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 12:42:33,496 INFO L158 Benchmark]: CACSL2BoogieTranslator took 621.22ms. Allocated memory is still 182.5MB. Free memory was 106.5MB in the beginning and 126.0MB in the end (delta: -19.5MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2024-06-14 12:42:33,496 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.10ms. Allocated memory is still 182.5MB. Free memory was 126.0MB in the beginning and 122.4MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-14 12:42:33,496 INFO L158 Benchmark]: Boogie Preprocessor took 79.63ms. Allocated memory is still 182.5MB. Free memory was 122.4MB in the beginning and 118.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-14 12:42:33,497 INFO L158 Benchmark]: RCFGBuilder took 690.86ms. Allocated memory is still 182.5MB. Free memory was 118.2MB in the beginning and 128.4MB in the end (delta: -10.3MB). Peak memory consumption was 58.4MB. Max. memory is 16.1GB. [2024-06-14 12:42:33,497 INFO L158 Benchmark]: TraceAbstraction took 12618.40ms. Allocated memory was 182.5MB in the beginning and 549.5MB in the end (delta: 367.0MB). Free memory was 128.4MB in the beginning and 348.4MB in the end (delta: -220.0MB). Peak memory consumption was 148.0MB. Max. memory is 16.1GB. [2024-06-14 12:42:33,498 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 119.5MB. Free memory is still 86.7MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.17ms. Allocated memory is still 182.5MB. Free memory is still 112.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 621.22ms. Allocated memory is still 182.5MB. Free memory was 106.5MB in the beginning and 126.0MB in the end (delta: -19.5MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.10ms. Allocated memory is still 182.5MB. Free memory was 126.0MB in the beginning and 122.4MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 79.63ms. Allocated memory is still 182.5MB. Free memory was 122.4MB in the beginning and 118.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 690.86ms. Allocated memory is still 182.5MB. Free memory was 118.2MB in the beginning and 128.4MB in the end (delta: -10.3MB). Peak memory consumption was 58.4MB. Max. memory is 16.1GB. * TraceAbstraction took 12618.40ms. Allocated memory was 182.5MB in the beginning and 549.5MB in the end (delta: 367.0MB). Free memory was 128.4MB in the beginning and 348.4MB in the end (delta: -220.0MB). Peak memory consumption was 148.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 837]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 838]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 53 locations, 4 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: 12.5s, OverallIterations: 15, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 503 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 394 mSDsluCounter, 73 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 77 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2202 IncrementalHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 77 mSolverCounterUnsat, 31 mSDtfsCounter, 2202 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=276occurred in iteration=9, InterpolantAutomatonStates: 94, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 206 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 191 ConstructedInterpolants, 0 QuantifiedInterpolants, 7914 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 PerfectInterpolantSequences, 0/0 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-14 12:42:33,521 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