./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe006_power.oepc-thin000_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe006_power.oepc-thin000_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe006_power.oepc-thin000_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe006_power.oepc-thin000_power.oepc.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-eb4cb34-m [2024-06-21 17:21:30,475 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:21:30,531 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:21:30,538 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:21:30,538 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:21:30,568 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:21:30,572 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:21:30,572 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:21:30,573 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:21:30,578 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:21:30,578 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:21:30,578 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:21:30,579 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:21:30,579 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:21:30,580 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:21:30,581 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:21:30,581 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:21:30,581 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:21:30,581 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:21:30,582 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:21:30,582 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:21:30,582 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:21:30,582 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:21:30,583 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:21:30,583 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:21:30,583 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:21:30,583 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:21:30,583 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:21:30,584 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:21:30,585 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:21:30,585 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:21:30,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:21:30,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:21:30,586 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:21:30,586 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:21:30,586 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:21:30,586 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:21:30,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:21:30,587 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:21:30,587 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:21:30,587 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:21:30,587 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:21:30,588 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:21:30,588 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:21:30,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:21:30,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:21:30,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:21:30,819 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:21:30,820 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:21:30,821 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe006_power.oepc-thin000_power.oepc.i [2024-06-21 17:21:31,826 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:21:32,060 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:21:32,061 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe006_power.oepc-thin000_power.oepc.i [2024-06-21 17:21:32,071 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfbcdee92/23ffedad3a214ea4881e733008c93fe1/FLAGa2ec3d8e8 [2024-06-21 17:21:32,081 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfbcdee92/23ffedad3a214ea4881e733008c93fe1 [2024-06-21 17:21:32,083 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:21:32,084 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:21:32,084 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe006_power.oepc-thin000_power.oepc.yml/witness.yml [2024-06-21 17:21:32,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:21:32,261 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:21:32,262 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:21:32,262 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:21:32,272 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:21:32,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:21:32" (1/2) ... [2024-06-21 17:21:32,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559652f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:32, skipping insertion in model container [2024-06-21 17:21:32,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:21:32" (1/2) ... [2024-06-21 17:21:32,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5bc79664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:21:32, skipping insertion in model container [2024-06-21 17:21:32,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:21:32" (2/2) ... [2024-06-21 17:21:32,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559652f2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32, skipping insertion in model container [2024-06-21 17:21:32,275 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:21:32" (2/2) ... [2024-06-21 17:21:32,275 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:21:32,344 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:21:32,346 INFO L97 edCorrectnessWitness]: Location invariant before [L816-L816] (((((((((((((((((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0) [2024-06-21 17:21:32,346 INFO L97 edCorrectnessWitness]: Location invariant before [L817-L817] (((((((((((((((((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0) [2024-06-21 17:21:32,346 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:21:32,347 INFO L106 edCorrectnessWitness]: ghost_update [L814-L814] multithreaded = 1; [2024-06-21 17:21:32,386 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:21:32,669 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:21:32,677 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:21:32,773 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:21:32,818 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:21:32,820 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32 WrapperNode [2024-06-21 17:21:32,820 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:21:32,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:21:32,822 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:21:32,822 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:21:32,827 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 21.06 05:21:32" (1/1) ... [2024-06-21 17:21:32,855 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 21.06 05:21:32" (1/1) ... [2024-06-21 17:21:32,889 INFO L138 Inliner]: procedures = 174, calls = 57, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 146 [2024-06-21 17:21:32,898 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:21:32,899 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:21:32,899 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:21:32,899 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:21:32,908 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32" (1/1) ... [2024-06-21 17:21:32,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32" (1/1) ... [2024-06-21 17:21:32,911 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32" (1/1) ... [2024-06-21 17:21:32,931 INFO L175 MemorySlicer]: Split 25 memory accesses to 2 slices as follows [2, 23]. 92 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-21 17:21:32,932 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32" (1/1) ... [2024-06-21 17:21:32,932 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32" (1/1) ... [2024-06-21 17:21:32,939 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32" (1/1) ... [2024-06-21 17:21:32,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32" (1/1) ... [2024-06-21 17:21:32,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32" (1/1) ... [2024-06-21 17:21:32,956 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32" (1/1) ... [2024-06-21 17:21:32,959 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:21:32,960 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:21:32,960 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:21:32,960 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:21:32,961 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32" (1/1) ... [2024-06-21 17:21:32,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:21:32,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:21:33,026 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) [2024-06-21 17:21:33,059 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 [2024-06-21 17:21:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:21:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:21:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:21:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:21:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:21:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:21:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:21:33,076 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:21:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:21:33,077 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:21:33,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:21:33,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:21:33,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:21:33,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:21:33,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:21:33,079 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:21:33,185 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:21:33,187 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:21:33,523 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:21:33,523 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:21:33,774 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:21:33,775 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:21:33,776 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:21:33 BoogieIcfgContainer [2024-06-21 17:21:33,776 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:21:33,779 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:21:33,779 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:21:33,781 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:21:33,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:21:32" (1/4) ... [2024-06-21 17:21:33,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce43f42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:21:33, skipping insertion in model container [2024-06-21 17:21:33,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:21:32" (2/4) ... [2024-06-21 17:21:33,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce43f42 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:21:33, skipping insertion in model container [2024-06-21 17:21:33,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:21:32" (3/4) ... [2024-06-21 17:21:33,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce43f42 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:21:33, skipping insertion in model container [2024-06-21 17:21:33,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:21:33" (4/4) ... [2024-06-21 17:21:33,785 INFO L112 eAbstractionObserver]: Analyzing ICFG safe006_power.oepc-thin000_power.oepc.i [2024-06-21 17:21:33,798 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:21:33,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 17:21:33,799 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:21:33,837 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:21:33,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 30 transitions, 68 flow [2024-06-21 17:21:33,892 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2024-06-21 17:21:33,892 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:21:33,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 0/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:21:33,895 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 30 transitions, 68 flow [2024-06-21 17:21:33,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 50 flow [2024-06-21 17:21:33,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:21:33,916 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;@18255222, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:21:33,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 17:21:33,920 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:21:33,921 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 17:21:33,921 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:21:33,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:33,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:21:33,922 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)] === [2024-06-21 17:21:33,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash 591385492, now seen corresponding path program 1 times [2024-06-21 17:21:33,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:33,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262795320] [2024-06-21 17:21:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:33,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:35,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:35,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262795320] [2024-06-21 17:21:35,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262795320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:35,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:35,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:21:35,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654006168] [2024-06-21 17:21:35,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:35,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:21:35,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:35,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:21:35,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:21:35,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 17:21:35,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-06-21 17:21:35,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:35,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 17:21:35,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:35,638 INFO L124 PetriNetUnfolderBase]: 113/223 cut-off events. [2024-06-21 17:21:35,638 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 17:21:35,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 223 events. 113/223 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 781 event pairs, 61 based on Foata normal form. 1/218 useless extension candidates. Maximal degree in co-relation 440. Up to 206 conditions per place. [2024-06-21 17:21:35,642 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 21 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 17:21:35,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 115 flow [2024-06-21 17:21:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:21:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:21:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-06-21 17:21:35,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-21 17:21:35,652 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 50 flow. Second operand 3 states and 47 transitions. [2024-06-21 17:21:35,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 115 flow [2024-06-21 17:21:35,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 17:21:35,655 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 69 flow [2024-06-21 17:21:35,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-06-21 17:21:35,659 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2024-06-21 17:21:35,659 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 69 flow [2024-06-21 17:21:35,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-06-21 17:21:35,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:35,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:35,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:21:35,660 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)] === [2024-06-21 17:21:35,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:35,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1385959945, now seen corresponding path program 1 times [2024-06-21 17:21:35,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:35,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122544710] [2024-06-21 17:21:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:35,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:37,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:37,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122544710] [2024-06-21 17:21:37,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122544710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:37,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:37,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:21:37,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409586078] [2024-06-21 17:21:37,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:37,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:21:37,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:37,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:21:37,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:21:37,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 17:21:37,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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) [2024-06-21 17:21:37,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:37,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 17:21:37,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:37,971 INFO L124 PetriNetUnfolderBase]: 110/217 cut-off events. [2024-06-21 17:21:37,972 INFO L125 PetriNetUnfolderBase]: For 44/47 co-relation queries the response was YES. [2024-06-21 17:21:37,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 217 events. 110/217 cut-off events. For 44/47 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 756 event pairs, 46 based on Foata normal form. 4/220 useless extension candidates. Maximal degree in co-relation 494. Up to 190 conditions per place. [2024-06-21 17:21:37,973 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 26 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-21 17:21:37,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 36 transitions, 161 flow [2024-06-21 17:21:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:21:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:21:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-06-21 17:21:37,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-21 17:21:37,975 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 69 flow. Second operand 4 states and 61 transitions. [2024-06-21 17:21:37,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 36 transitions, 161 flow [2024-06-21 17:21:37,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:21:37,977 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 93 flow [2024-06-21 17:21:37,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-06-21 17:21:37,977 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2024-06-21 17:21:37,978 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 93 flow [2024-06-21 17:21:37,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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) [2024-06-21 17:21:37,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:37,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:37,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:21:37,978 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:21:37,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:37,979 INFO L85 PathProgramCache]: Analyzing trace with hash 15086679, now seen corresponding path program 1 times [2024-06-21 17:21:37,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:37,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824121510] [2024-06-21 17:21:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:37,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:39,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824121510] [2024-06-21 17:21:39,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824121510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:39,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:39,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:21:39,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850947217] [2024-06-21 17:21:39,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:39,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:21:39,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:39,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:21:39,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:21:39,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 17:21:39,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2024-06-21 17:21:39,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:39,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 17:21:39,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:39,884 INFO L124 PetriNetUnfolderBase]: 125/242 cut-off events. [2024-06-21 17:21:39,885 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-06-21 17:21:39,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 242 events. 125/242 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 830 event pairs, 37 based on Foata normal form. 2/243 useless extension candidates. Maximal degree in co-relation 618. Up to 205 conditions per place. [2024-06-21 17:21:39,887 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 36 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-06-21 17:21:39,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 235 flow [2024-06-21 17:21:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:21:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:21:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-06-21 17:21:39,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-06-21 17:21:39,888 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 93 flow. Second operand 5 states and 71 transitions. [2024-06-21 17:21:39,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 235 flow [2024-06-21 17:21:39,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 224 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 17:21:39,890 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 137 flow [2024-06-21 17:21:39,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-06-21 17:21:39,891 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2024-06-21 17:21:39,891 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 137 flow [2024-06-21 17:21:39,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2024-06-21 17:21:39,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:39,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:39,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:21:39,892 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)] === [2024-06-21 17:21:39,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1614035308, now seen corresponding path program 1 times [2024-06-21 17:21:39,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:39,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643342607] [2024-06-21 17:21:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:39,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:41,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:41,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643342607] [2024-06-21 17:21:41,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643342607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:41,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:41,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:21:41,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217820402] [2024-06-21 17:21:41,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:41,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:21:41,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:41,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:21:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:21:41,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 17:21:41,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 137 flow. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2024-06-21 17:21:41,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:41,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 17:21:41,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:42,352 INFO L124 PetriNetUnfolderBase]: 121/234 cut-off events. [2024-06-21 17:21:42,353 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2024-06-21 17:21:42,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 234 events. 121/234 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 808 event pairs, 18 based on Foata normal form. 4/237 useless extension candidates. Maximal degree in co-relation 674. Up to 175 conditions per place. [2024-06-21 17:21:42,355 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 36 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2024-06-21 17:21:42,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 257 flow [2024-06-21 17:21:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:21:42,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:21:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2024-06-21 17:21:42,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:21:42,357 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 137 flow. Second operand 6 states and 78 transitions. [2024-06-21 17:21:42,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 257 flow [2024-06-21 17:21:42,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 257 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 17:21:42,358 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 149 flow [2024-06-21 17:21:42,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2024-06-21 17:21:42,359 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2024-06-21 17:21:42,359 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 149 flow [2024-06-21 17:21:42,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2024-06-21 17:21:42,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:42,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:42,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:21:42,360 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)] === [2024-06-21 17:21:42,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:42,361 INFO L85 PathProgramCache]: Analyzing trace with hash 852089928, now seen corresponding path program 1 times [2024-06-21 17:21:42,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:42,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144248615] [2024-06-21 17:21:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:42,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:43,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:43,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144248615] [2024-06-21 17:21:43,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144248615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:43,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:43,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:21:43,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163560707] [2024-06-21 17:21:43,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:43,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:21:43,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:43,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:21:43,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:21:43,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:21:43,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 149 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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) [2024-06-21 17:21:43,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:43,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:21:43,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:44,125 INFO L124 PetriNetUnfolderBase]: 117/228 cut-off events. [2024-06-21 17:21:44,125 INFO L125 PetriNetUnfolderBase]: For 369/369 co-relation queries the response was YES. [2024-06-21 17:21:44,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 228 events. 117/228 cut-off events. For 369/369 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 770 event pairs, 32 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 707. Up to 204 conditions per place. [2024-06-21 17:21:44,127 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 30 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-06-21 17:21:44,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 245 flow [2024-06-21 17:21:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:21:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:21:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-06-21 17:21:44,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2024-06-21 17:21:44,129 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 149 flow. Second operand 5 states and 56 transitions. [2024-06-21 17:21:44,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 245 flow [2024-06-21 17:21:44,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 224 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:44,131 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 157 flow [2024-06-21 17:21:44,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2024-06-21 17:21:44,131 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2024-06-21 17:21:44,132 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 157 flow [2024-06-21 17:21:44,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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) [2024-06-21 17:21:44,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:44,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:44,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:21:44,132 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)] === [2024-06-21 17:21:44,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1947330719, now seen corresponding path program 1 times [2024-06-21 17:21:44,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:44,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351112939] [2024-06-21 17:21:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:44,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:46,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:46,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351112939] [2024-06-21 17:21:46,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351112939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:46,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:46,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:46,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356919344] [2024-06-21 17:21:46,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:46,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:46,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:46,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:46,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:46,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:21:46,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 157 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2024-06-21 17:21:46,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:46,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:21:46,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:47,426 INFO L124 PetriNetUnfolderBase]: 120/235 cut-off events. [2024-06-21 17:21:47,427 INFO L125 PetriNetUnfolderBase]: For 434/434 co-relation queries the response was YES. [2024-06-21 17:21:47,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 235 events. 120/235 cut-off events. For 434/434 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 807 event pairs, 31 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 748. Up to 181 conditions per place. [2024-06-21 17:21:47,429 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 37 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2024-06-21 17:21:47,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 329 flow [2024-06-21 17:21:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:47,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-21 17:21:47,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 17:21:47,433 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 157 flow. Second operand 7 states and 82 transitions. [2024-06-21 17:21:47,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 329 flow [2024-06-21 17:21:47,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 316 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:47,438 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 201 flow [2024-06-21 17:21:47,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=201, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2024-06-21 17:21:47,441 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2024-06-21 17:21:47,441 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 201 flow [2024-06-21 17:21:47,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2024-06-21 17:21:47,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:47,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:47,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:21:47,442 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)] === [2024-06-21 17:21:47,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:47,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1657675889, now seen corresponding path program 2 times [2024-06-21 17:21:47,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:47,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492216642] [2024-06-21 17:21:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:47,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:49,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:49,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492216642] [2024-06-21 17:21:49,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492216642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:49,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:49,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:49,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169974821] [2024-06-21 17:21:49,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:49,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:49,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:49,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:49,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:49,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:21:49,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 201 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2024-06-21 17:21:49,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:49,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:21:49,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:50,389 INFO L124 PetriNetUnfolderBase]: 126/247 cut-off events. [2024-06-21 17:21:50,390 INFO L125 PetriNetUnfolderBase]: For 610/610 co-relation queries the response was YES. [2024-06-21 17:21:50,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 247 events. 126/247 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 869 event pairs, 31 based on Foata normal form. 1/247 useless extension candidates. Maximal degree in co-relation 853. Up to 205 conditions per place. [2024-06-21 17:21:50,411 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 37 selfloop transitions, 13 changer transitions 0/53 dead transitions. [2024-06-21 17:21:50,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 357 flow [2024-06-21 17:21:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-06-21 17:21:50,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-21 17:21:50,412 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 201 flow. Second operand 7 states and 76 transitions. [2024-06-21 17:21:50,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 357 flow [2024-06-21 17:21:50,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 338 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:50,415 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 245 flow [2024-06-21 17:21:50,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=245, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2024-06-21 17:21:50,415 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2024-06-21 17:21:50,416 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 245 flow [2024-06-21 17:21:50,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2024-06-21 17:21:50,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:50,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:50,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:21:50,416 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)] === [2024-06-21 17:21:50,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:50,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1657675703, now seen corresponding path program 1 times [2024-06-21 17:21:50,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:50,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079656728] [2024-06-21 17:21:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:50,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:52,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:52,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079656728] [2024-06-21 17:21:52,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079656728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:52,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:52,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:52,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934988471] [2024-06-21 17:21:52,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:52,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:52,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:52,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:52,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:52,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:21:52,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2024-06-21 17:21:52,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:52,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:21:52,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:53,300 INFO L124 PetriNetUnfolderBase]: 142/273 cut-off events. [2024-06-21 17:21:53,301 INFO L125 PetriNetUnfolderBase]: For 849/849 co-relation queries the response was YES. [2024-06-21 17:21:53,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 273 events. 142/273 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 977 event pairs, 33 based on Foata normal form. 2/274 useless extension candidates. Maximal degree in co-relation 981. Up to 219 conditions per place. [2024-06-21 17:21:53,302 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 43 selfloop transitions, 15 changer transitions 0/61 dead transitions. [2024-06-21 17:21:53,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 427 flow [2024-06-21 17:21:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 17:21:53,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625 [2024-06-21 17:21:53,315 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 245 flow. Second operand 8 states and 87 transitions. [2024-06-21 17:21:53,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 427 flow [2024-06-21 17:21:53,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 398 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 17:21:53,317 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 271 flow [2024-06-21 17:21:53,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=271, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2024-06-21 17:21:53,318 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2024-06-21 17:21:53,318 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 271 flow [2024-06-21 17:21:53,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2024-06-21 17:21:53,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:53,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:53,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:21:53,319 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)] === [2024-06-21 17:21:53,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:53,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1925381051, now seen corresponding path program 2 times [2024-06-21 17:21:53,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:53,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090386115] [2024-06-21 17:21:53,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:53,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:55,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:55,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090386115] [2024-06-21 17:21:55,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090386115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:55,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:55,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:55,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262395502] [2024-06-21 17:21:55,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:55,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:55,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:55,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:55,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:55,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:21:55,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 271 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2024-06-21 17:21:55,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:55,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:21:55,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:55,562 INFO L124 PetriNetUnfolderBase]: 138/268 cut-off events. [2024-06-21 17:21:55,562 INFO L125 PetriNetUnfolderBase]: For 1056/1059 co-relation queries the response was YES. [2024-06-21 17:21:55,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1034 conditions, 268 events. 138/268 cut-off events. For 1056/1059 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 961 event pairs, 37 based on Foata normal form. 4/270 useless extension candidates. Maximal degree in co-relation 1008. Up to 199 conditions per place. [2024-06-21 17:21:55,564 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 38 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2024-06-21 17:21:55,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 57 transitions, 429 flow [2024-06-21 17:21:55,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:21:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:21:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 68 transitions. [2024-06-21 17:21:55,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-21 17:21:55,565 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 271 flow. Second operand 6 states and 68 transitions. [2024-06-21 17:21:55,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 57 transitions, 429 flow [2024-06-21 17:21:55,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 410 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:21:55,568 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 305 flow [2024-06-21 17:21:55,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2024-06-21 17:21:55,568 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2024-06-21 17:21:55,569 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 305 flow [2024-06-21 17:21:55,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2024-06-21 17:21:55,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:55,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:55,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:21:55,569 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)] === [2024-06-21 17:21:55,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:55,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1925618201, now seen corresponding path program 3 times [2024-06-21 17:21:55,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:55,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152712860] [2024-06-21 17:21:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:55,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:57,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:57,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152712860] [2024-06-21 17:21:57,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152712860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:57,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:57,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:57,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305437976] [2024-06-21 17:21:57,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:57,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:57,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:57,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:57,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:57,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:21:57,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 305 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2024-06-21 17:21:57,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:57,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:21:57,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:57,547 INFO L124 PetriNetUnfolderBase]: 134/261 cut-off events. [2024-06-21 17:21:57,547 INFO L125 PetriNetUnfolderBase]: For 1104/1104 co-relation queries the response was YES. [2024-06-21 17:21:57,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 261 events. 134/261 cut-off events. For 1104/1104 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 923 event pairs, 31 based on Foata normal form. 2/262 useless extension candidates. Maximal degree in co-relation 1037. Up to 210 conditions per place. [2024-06-21 17:21:57,549 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 42 selfloop transitions, 14 changer transitions 0/59 dead transitions. [2024-06-21 17:21:57,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 445 flow [2024-06-21 17:21:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:21:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:21:57,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2024-06-21 17:21:57,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 17:21:57,551 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 305 flow. Second operand 6 states and 69 transitions. [2024-06-21 17:21:57,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 445 flow [2024-06-21 17:21:57,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 404 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:21:57,553 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 300 flow [2024-06-21 17:21:57,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-06-21 17:21:57,554 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2024-06-21 17:21:57,554 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 300 flow [2024-06-21 17:21:57,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2024-06-21 17:21:57,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:57,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:57,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:21:57,555 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)] === [2024-06-21 17:21:57,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:57,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1925618387, now seen corresponding path program 3 times [2024-06-21 17:21:57,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:57,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921781077] [2024-06-21 17:21:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:57,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:59,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:59,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921781077] [2024-06-21 17:21:59,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921781077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:59,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:59,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:21:59,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595748158] [2024-06-21 17:21:59,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:59,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:21:59,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:59,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:21:59,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:21:59,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:21:59,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 300 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2024-06-21 17:21:59,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:59,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:21:59,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:00,279 INFO L124 PetriNetUnfolderBase]: 132/258 cut-off events. [2024-06-21 17:22:00,280 INFO L125 PetriNetUnfolderBase]: For 1195/1195 co-relation queries the response was YES. [2024-06-21 17:22:00,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 258 events. 132/258 cut-off events. For 1195/1195 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 916 event pairs, 31 based on Foata normal form. 1/258 useless extension candidates. Maximal degree in co-relation 1027. Up to 202 conditions per place. [2024-06-21 17:22:00,281 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 43 selfloop transitions, 16 changer transitions 0/62 dead transitions. [2024-06-21 17:22:00,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 454 flow [2024-06-21 17:22:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:22:00,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:22:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2024-06-21 17:22:00,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-21 17:22:00,283 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 300 flow. Second operand 6 states and 73 transitions. [2024-06-21 17:22:00,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 454 flow [2024-06-21 17:22:00,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 417 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:00,287 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 306 flow [2024-06-21 17:22:00,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-06-21 17:22:00,287 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2024-06-21 17:22:00,287 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 306 flow [2024-06-21 17:22:00,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2024-06-21 17:22:00,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:00,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:00,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:22:00,288 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)] === [2024-06-21 17:22:00,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:00,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1925372123, now seen corresponding path program 1 times [2024-06-21 17:22:00,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:00,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636487707] [2024-06-21 17:22:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:00,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:02,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:02,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636487707] [2024-06-21 17:22:02,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636487707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:02,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:02,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:02,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77636344] [2024-06-21 17:22:02,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:02,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:02,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:02,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:02,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:02,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:02,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 306 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:02,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:02,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:02,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:02,692 INFO L124 PetriNetUnfolderBase]: 129/253 cut-off events. [2024-06-21 17:22:02,692 INFO L125 PetriNetUnfolderBase]: For 1192/1192 co-relation queries the response was YES. [2024-06-21 17:22:02,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 253 events. 129/253 cut-off events. For 1192/1192 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 880 event pairs, 28 based on Foata normal form. 2/254 useless extension candidates. Maximal degree in co-relation 1003. Up to 219 conditions per place. [2024-06-21 17:22:02,694 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 45 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-21 17:22:02,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 432 flow [2024-06-21 17:22:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:22:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:22:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-06-21 17:22:02,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-21 17:22:02,696 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 306 flow. Second operand 6 states and 63 transitions. [2024-06-21 17:22:02,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 432 flow [2024-06-21 17:22:02,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 56 transitions, 398 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 17:22:02,700 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 292 flow [2024-06-21 17:22:02,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2024-06-21 17:22:02,701 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2024-06-21 17:22:02,701 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 292 flow [2024-06-21 17:22:02,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:02,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:02,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:02,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:22:02,702 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)] === [2024-06-21 17:22:02,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:02,702 INFO L85 PathProgramCache]: Analyzing trace with hash 147936973, now seen corresponding path program 1 times [2024-06-21 17:22:02,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:02,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610045607] [2024-06-21 17:22:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:02,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:04,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:04,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610045607] [2024-06-21 17:22:04,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610045607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:04,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:04,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:04,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221342560] [2024-06-21 17:22:04,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:04,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:04,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:04,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:04,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:04,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:04,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 292 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:04,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:04,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:04,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:05,389 INFO L124 PetriNetUnfolderBase]: 145/283 cut-off events. [2024-06-21 17:22:05,389 INFO L125 PetriNetUnfolderBase]: For 1280/1280 co-relation queries the response was YES. [2024-06-21 17:22:05,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 283 events. 145/283 cut-off events. For 1280/1280 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1032 event pairs, 32 based on Foata normal form. 2/284 useless extension candidates. Maximal degree in co-relation 1098. Up to 183 conditions per place. [2024-06-21 17:22:05,391 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 45 selfloop transitions, 26 changer transitions 0/74 dead transitions. [2024-06-21 17:22:05,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 534 flow [2024-06-21 17:22:05,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:22:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:22:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 17:22:05,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36333333333333334 [2024-06-21 17:22:05,393 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 292 flow. Second operand 10 states and 109 transitions. [2024-06-21 17:22:05,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 534 flow [2024-06-21 17:22:05,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 516 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:22:05,397 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 363 flow [2024-06-21 17:22:05,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=363, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2024-06-21 17:22:05,398 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2024-06-21 17:22:05,398 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 363 flow [2024-06-21 17:22:05,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:05,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:05,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:05,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:22:05,399 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)] === [2024-06-21 17:22:05,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:05,399 INFO L85 PathProgramCache]: Analyzing trace with hash 151656043, now seen corresponding path program 2 times [2024-06-21 17:22:05,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:05,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225968385] [2024-06-21 17:22:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:05,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:07,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:07,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225968385] [2024-06-21 17:22:07,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225968385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:07,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:07,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:07,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327055810] [2024-06-21 17:22:07,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:07,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:07,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:07,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:07,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:07,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 363 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:07,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:07,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:07,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:08,208 INFO L124 PetriNetUnfolderBase]: 161/315 cut-off events. [2024-06-21 17:22:08,208 INFO L125 PetriNetUnfolderBase]: For 1775/1775 co-relation queries the response was YES. [2024-06-21 17:22:08,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1349 conditions, 315 events. 161/315 cut-off events. For 1775/1775 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1220 event pairs, 32 based on Foata normal form. 2/316 useless extension candidates. Maximal degree in co-relation 1318. Up to 234 conditions per place. [2024-06-21 17:22:08,211 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 51 selfloop transitions, 21 changer transitions 0/75 dead transitions. [2024-06-21 17:22:08,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 75 transitions, 609 flow [2024-06-21 17:22:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:22:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:22:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 17:22:08,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35333333333333333 [2024-06-21 17:22:08,213 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 363 flow. Second operand 10 states and 106 transitions. [2024-06-21 17:22:08,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 75 transitions, 609 flow [2024-06-21 17:22:08,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 75 transitions, 556 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:08,216 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 397 flow [2024-06-21 17:22:08,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=397, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2024-06-21 17:22:08,218 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2024-06-21 17:22:08,218 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 397 flow [2024-06-21 17:22:08,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:08,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:08,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:08,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:22:08,219 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)] === [2024-06-21 17:22:08,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:08,219 INFO L85 PathProgramCache]: Analyzing trace with hash 151661623, now seen corresponding path program 3 times [2024-06-21 17:22:08,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:08,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113720964] [2024-06-21 17:22:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:08,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:10,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:10,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113720964] [2024-06-21 17:22:10,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113720964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:10,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:10,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:10,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77272330] [2024-06-21 17:22:10,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:10,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:10,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:10,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:10,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:10,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:10,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 397 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:10,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:10,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:10,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:11,066 INFO L124 PetriNetUnfolderBase]: 157/309 cut-off events. [2024-06-21 17:22:11,067 INFO L125 PetriNetUnfolderBase]: For 1825/1825 co-relation queries the response was YES. [2024-06-21 17:22:11,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1335 conditions, 309 events. 157/309 cut-off events. For 1825/1825 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1182 event pairs, 32 based on Foata normal form. 2/310 useless extension candidates. Maximal degree in co-relation 1302. Up to 231 conditions per place. [2024-06-21 17:22:11,069 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 51 selfloop transitions, 21 changer transitions 0/75 dead transitions. [2024-06-21 17:22:11,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 585 flow [2024-06-21 17:22:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:22:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:22:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-21 17:22:11,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3393939393939394 [2024-06-21 17:22:11,071 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 397 flow. Second operand 11 states and 112 transitions. [2024-06-21 17:22:11,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 585 flow [2024-06-21 17:22:11,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 75 transitions, 552 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:11,077 INFO L231 Difference]: Finished difference. Result has 75 places, 55 transitions, 411 flow [2024-06-21 17:22:11,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=411, PETRI_PLACES=75, PETRI_TRANSITIONS=55} [2024-06-21 17:22:11,078 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2024-06-21 17:22:11,078 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 55 transitions, 411 flow [2024-06-21 17:22:11,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:11,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:11,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:11,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:22:11,078 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:11,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:11,078 INFO L85 PathProgramCache]: Analyzing trace with hash 657023817, now seen corresponding path program 4 times [2024-06-21 17:22:11,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:11,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342823616] [2024-06-21 17:22:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:11,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:13,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:13,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342823616] [2024-06-21 17:22:13,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342823616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:13,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:13,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:13,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731112271] [2024-06-21 17:22:13,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:13,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:13,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:13,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:13,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:13,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:13,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 55 transitions, 411 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:13,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:13,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:13,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:13,815 INFO L124 PetriNetUnfolderBase]: 163/321 cut-off events. [2024-06-21 17:22:13,815 INFO L125 PetriNetUnfolderBase]: For 2094/2094 co-relation queries the response was YES. [2024-06-21 17:22:13,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 321 events. 163/321 cut-off events. For 2094/2094 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1254 event pairs, 32 based on Foata normal form. 2/322 useless extension candidates. Maximal degree in co-relation 1392. Up to 210 conditions per place. [2024-06-21 17:22:13,818 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 46 selfloop transitions, 28 changer transitions 0/77 dead transitions. [2024-06-21 17:22:13,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 77 transitions, 649 flow [2024-06-21 17:22:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-21 17:22:13,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 17:22:13,829 INFO L175 Difference]: Start difference. First operand has 75 places, 55 transitions, 411 flow. Second operand 8 states and 93 transitions. [2024-06-21 17:22:13,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 77 transitions, 649 flow [2024-06-21 17:22:13,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 77 transitions, 604 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 17:22:13,843 INFO L231 Difference]: Finished difference. Result has 73 places, 57 transitions, 448 flow [2024-06-21 17:22:13,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=448, PETRI_PLACES=73, PETRI_TRANSITIONS=57} [2024-06-21 17:22:13,845 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2024-06-21 17:22:13,846 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 57 transitions, 448 flow [2024-06-21 17:22:13,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:13,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:13,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:13,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:22:13,847 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:13,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash 435373197, now seen corresponding path program 5 times [2024-06-21 17:22:13,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:13,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848505149] [2024-06-21 17:22:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:13,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:15,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:15,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848505149] [2024-06-21 17:22:15,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848505149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:15,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:15,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:15,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075090674] [2024-06-21 17:22:15,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:15,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:15,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:15,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:15,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:15,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:15,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 57 transitions, 448 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:15,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:15,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:15,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:16,679 INFO L124 PetriNetUnfolderBase]: 159/315 cut-off events. [2024-06-21 17:22:16,679 INFO L125 PetriNetUnfolderBase]: For 2250/2250 co-relation queries the response was YES. [2024-06-21 17:22:16,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1428 conditions, 315 events. 159/315 cut-off events. For 2250/2250 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1229 event pairs, 31 based on Foata normal form. 2/316 useless extension candidates. Maximal degree in co-relation 1392. Up to 207 conditions per place. [2024-06-21 17:22:16,682 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 47 selfloop transitions, 28 changer transitions 0/78 dead transitions. [2024-06-21 17:22:16,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 646 flow [2024-06-21 17:22:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:16,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 17:22:16,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 17:22:16,683 INFO L175 Difference]: Start difference. First operand has 73 places, 57 transitions, 448 flow. Second operand 9 states and 100 transitions. [2024-06-21 17:22:16,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 646 flow [2024-06-21 17:22:16,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 591 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:16,688 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 457 flow [2024-06-21 17:22:16,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=457, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2024-06-21 17:22:16,688 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 47 predicate places. [2024-06-21 17:22:16,688 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 457 flow [2024-06-21 17:22:16,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:16,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:16,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:16,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:22:16,689 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:16,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:16,689 INFO L85 PathProgramCache]: Analyzing trace with hash 442730427, now seen corresponding path program 6 times [2024-06-21 17:22:16,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:16,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446104081] [2024-06-21 17:22:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:16,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:18,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:18,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446104081] [2024-06-21 17:22:18,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446104081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:18,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:18,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:18,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052836854] [2024-06-21 17:22:18,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:18,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:18,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:18,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:18,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:18,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 457 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:18,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:18,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:18,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:19,465 INFO L124 PetriNetUnfolderBase]: 155/310 cut-off events. [2024-06-21 17:22:19,465 INFO L125 PetriNetUnfolderBase]: For 2171/2174 co-relation queries the response was YES. [2024-06-21 17:22:19,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 310 events. 155/310 cut-off events. For 2171/2174 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1209 event pairs, 33 based on Foata normal form. 4/312 useless extension candidates. Maximal degree in co-relation 1349. Up to 179 conditions per place. [2024-06-21 17:22:19,467 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 42 selfloop transitions, 32 changer transitions 0/77 dead transitions. [2024-06-21 17:22:19,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 663 flow [2024-06-21 17:22:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-21 17:22:19,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362962962962963 [2024-06-21 17:22:19,470 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 457 flow. Second operand 9 states and 98 transitions. [2024-06-21 17:22:19,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 663 flow [2024-06-21 17:22:19,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 584 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 17:22:19,478 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 469 flow [2024-06-21 17:22:19,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=469, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2024-06-21 17:22:19,479 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2024-06-21 17:22:19,479 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 469 flow [2024-06-21 17:22:19,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:19,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:19,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:19,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:22:19,480 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:19,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:19,480 INFO L85 PathProgramCache]: Analyzing trace with hash 413055178, now seen corresponding path program 1 times [2024-06-21 17:22:19,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:19,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133388431] [2024-06-21 17:22:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:19,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:21,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:21,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133388431] [2024-06-21 17:22:21,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133388431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:21,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:21,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:21,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190553530] [2024-06-21 17:22:21,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:21,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:21,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:21,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:21,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:21,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:21,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 469 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:21,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:21,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:21,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:21,754 INFO L124 PetriNetUnfolderBase]: 199/399 cut-off events. [2024-06-21 17:22:21,755 INFO L125 PetriNetUnfolderBase]: For 2452/2454 co-relation queries the response was YES. [2024-06-21 17:22:21,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1796 conditions, 399 events. 199/399 cut-off events. For 2452/2454 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1731 event pairs, 37 based on Foata normal form. 4/402 useless extension candidates. Maximal degree in co-relation 1760. Up to 262 conditions per place. [2024-06-21 17:22:21,757 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 67 selfloop transitions, 29 changer transitions 0/99 dead transitions. [2024-06-21 17:22:21,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 99 transitions, 898 flow [2024-06-21 17:22:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-21 17:22:21,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2024-06-21 17:22:21,759 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 469 flow. Second operand 9 states and 104 transitions. [2024-06-21 17:22:21,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 99 transitions, 898 flow [2024-06-21 17:22:21,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 805 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:21,765 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 605 flow [2024-06-21 17:22:21,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=605, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2024-06-21 17:22:21,766 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 51 predicate places. [2024-06-21 17:22:21,766 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 605 flow [2024-06-21 17:22:21,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:21,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:21,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:21,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:22:21,767 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:21,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash 288218028, now seen corresponding path program 2 times [2024-06-21 17:22:21,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:21,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74830284] [2024-06-21 17:22:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:21,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:23,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:23,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74830284] [2024-06-21 17:22:23,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74830284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:23,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:23,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:23,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242011615] [2024-06-21 17:22:23,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:23,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:23,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:23,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:23,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:23,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:23,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 605 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:23,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:23,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:23,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:24,383 INFO L124 PetriNetUnfolderBase]: 203/407 cut-off events. [2024-06-21 17:22:24,384 INFO L125 PetriNetUnfolderBase]: For 2781/2783 co-relation queries the response was YES. [2024-06-21 17:22:24,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1873 conditions, 407 events. 203/407 cut-off events. For 2781/2783 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1780 event pairs, 21 based on Foata normal form. 4/410 useless extension candidates. Maximal degree in co-relation 1833. Up to 221 conditions per place. [2024-06-21 17:22:24,386 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 57 selfloop transitions, 34 changer transitions 0/94 dead transitions. [2024-06-21 17:22:24,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 94 transitions, 877 flow [2024-06-21 17:22:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 17:22:24,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-21 17:22:24,388 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 605 flow. Second operand 8 states and 89 transitions. [2024-06-21 17:22:24,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 94 transitions, 877 flow [2024-06-21 17:22:24,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 94 transitions, 863 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 17:22:24,394 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 675 flow [2024-06-21 17:22:24,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=675, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2024-06-21 17:22:24,394 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2024-06-21 17:22:24,394 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 675 flow [2024-06-21 17:22:24,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:24,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:24,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:24,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:22:24,395 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:24,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:24,396 INFO L85 PathProgramCache]: Analyzing trace with hash 288278478, now seen corresponding path program 3 times [2024-06-21 17:22:24,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:24,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289217193] [2024-06-21 17:22:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:24,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:26,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:26,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289217193] [2024-06-21 17:22:26,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289217193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:26,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:26,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:26,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372268974] [2024-06-21 17:22:26,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:26,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:26,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:26,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:26,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:26,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:26,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 675 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:26,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:26,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:26,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:27,374 INFO L124 PetriNetUnfolderBase]: 211/423 cut-off events. [2024-06-21 17:22:27,374 INFO L125 PetriNetUnfolderBase]: For 3573/3575 co-relation queries the response was YES. [2024-06-21 17:22:27,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2051 conditions, 423 events. 211/423 cut-off events. For 3573/3575 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1885 event pairs, 36 based on Foata normal form. 6/428 useless extension candidates. Maximal degree in co-relation 2009. Up to 305 conditions per place. [2024-06-21 17:22:27,377 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 60 selfloop transitions, 31 changer transitions 0/94 dead transitions. [2024-06-21 17:22:27,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 94 transitions, 926 flow [2024-06-21 17:22:27,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 17:22:27,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-21 17:22:27,379 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 675 flow. Second operand 8 states and 89 transitions. [2024-06-21 17:22:27,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 94 transitions, 926 flow [2024-06-21 17:22:27,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 94 transitions, 859 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:27,384 INFO L231 Difference]: Finished difference. Result has 88 places, 77 transitions, 704 flow [2024-06-21 17:22:27,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=704, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2024-06-21 17:22:27,385 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 59 predicate places. [2024-06-21 17:22:27,385 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 704 flow [2024-06-21 17:22:27,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:27,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:27,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:27,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:22:27,386 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:27,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:27,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1551552520, now seen corresponding path program 4 times [2024-06-21 17:22:27,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:27,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923300761] [2024-06-21 17:22:27,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:27,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:29,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:29,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923300761] [2024-06-21 17:22:29,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923300761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:29,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:29,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:29,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128366065] [2024-06-21 17:22:29,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:29,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:29,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:29,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:29,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:29,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:29,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 704 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:29,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:29,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:29,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:30,224 INFO L124 PetriNetUnfolderBase]: 212/426 cut-off events. [2024-06-21 17:22:30,225 INFO L125 PetriNetUnfolderBase]: For 3388/3390 co-relation queries the response was YES. [2024-06-21 17:22:30,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2037 conditions, 426 events. 212/426 cut-off events. For 3388/3390 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1918 event pairs, 35 based on Foata normal form. 6/431 useless extension candidates. Maximal degree in co-relation 1995. Up to 343 conditions per place. [2024-06-21 17:22:30,228 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 69 selfloop transitions, 20 changer transitions 0/92 dead transitions. [2024-06-21 17:22:30,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 92 transitions, 931 flow [2024-06-21 17:22:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-06-21 17:22:30,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-21 17:22:30,229 INFO L175 Difference]: Start difference. First operand has 88 places, 77 transitions, 704 flow. Second operand 8 states and 84 transitions. [2024-06-21 17:22:30,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 92 transitions, 931 flow [2024-06-21 17:22:30,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 92 transitions, 840 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:30,236 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 672 flow [2024-06-21 17:22:30,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=672, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2024-06-21 17:22:30,237 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2024-06-21 17:22:30,237 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 672 flow [2024-06-21 17:22:30,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:30,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:30,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:30,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:22:30,238 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:30,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:30,238 INFO L85 PathProgramCache]: Analyzing trace with hash 54247600, now seen corresponding path program 1 times [2024-06-21 17:22:30,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:30,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947132900] [2024-06-21 17:22:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:30,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:32,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:32,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947132900] [2024-06-21 17:22:32,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947132900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:32,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:32,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:32,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543808650] [2024-06-21 17:22:32,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:32,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:32,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:32,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:32,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:33,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:33,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 672 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:33,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:33,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:33,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:33,603 INFO L124 PetriNetUnfolderBase]: 216/430 cut-off events. [2024-06-21 17:22:33,603 INFO L125 PetriNetUnfolderBase]: For 3260/3262 co-relation queries the response was YES. [2024-06-21 17:22:33,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1987 conditions, 430 events. 216/430 cut-off events. For 3260/3262 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1939 event pairs, 31 based on Foata normal form. 4/433 useless extension candidates. Maximal degree in co-relation 1945. Up to 349 conditions per place. [2024-06-21 17:22:33,606 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 74 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-21 17:22:33,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 96 transitions, 910 flow [2024-06-21 17:22:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:33,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-21 17:22:33,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34814814814814815 [2024-06-21 17:22:33,607 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 672 flow. Second operand 9 states and 94 transitions. [2024-06-21 17:22:33,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 96 transitions, 910 flow [2024-06-21 17:22:33,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 96 transitions, 866 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:33,613 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 680 flow [2024-06-21 17:22:33,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=680, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2024-06-21 17:22:33,613 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 63 predicate places. [2024-06-21 17:22:33,613 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 680 flow [2024-06-21 17:22:33,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:33,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:33,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:33,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:22:33,614 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:33,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1107275012, now seen corresponding path program 5 times [2024-06-21 17:22:33,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:33,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232525657] [2024-06-21 17:22:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:33,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:35,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:35,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232525657] [2024-06-21 17:22:35,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232525657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:35,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:35,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:22:35,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763565154] [2024-06-21 17:22:35,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:35,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:22:35,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:22:35,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:22:35,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:35,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 680 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:35,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:35,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:35,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:36,154 INFO L124 PetriNetUnfolderBase]: 213/429 cut-off events. [2024-06-21 17:22:36,154 INFO L125 PetriNetUnfolderBase]: For 3179/3181 co-relation queries the response was YES. [2024-06-21 17:22:36,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1948 conditions, 429 events. 213/429 cut-off events. For 3179/3181 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1930 event pairs, 18 based on Foata normal form. 4/432 useless extension candidates. Maximal degree in co-relation 1905. Up to 276 conditions per place. [2024-06-21 17:22:36,157 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 64 selfloop transitions, 28 changer transitions 0/95 dead transitions. [2024-06-21 17:22:36,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 908 flow [2024-06-21 17:22:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-06-21 17:22:36,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-21 17:22:36,159 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 680 flow. Second operand 7 states and 81 transitions. [2024-06-21 17:22:36,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 908 flow [2024-06-21 17:22:36,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 95 transitions, 862 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:36,166 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 703 flow [2024-06-21 17:22:36,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=703, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2024-06-21 17:22:36,166 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 63 predicate places. [2024-06-21 17:22:36,167 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 703 flow [2024-06-21 17:22:36,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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) [2024-06-21 17:22:36,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:36,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:36,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:22:36,168 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:36,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1107090314, now seen corresponding path program 2 times [2024-06-21 17:22:36,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:36,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979282805] [2024-06-21 17:22:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:38,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:38,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979282805] [2024-06-21 17:22:38,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979282805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:38,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:38,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:38,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315653779] [2024-06-21 17:22:38,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:38,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:38,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:38,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:38,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:38,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:38,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 703 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:38,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:38,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:38,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:38,818 INFO L124 PetriNetUnfolderBase]: 217/433 cut-off events. [2024-06-21 17:22:38,819 INFO L125 PetriNetUnfolderBase]: For 3717/3719 co-relation queries the response was YES. [2024-06-21 17:22:38,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2023 conditions, 433 events. 217/433 cut-off events. For 3717/3719 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1964 event pairs, 31 based on Foata normal form. 4/436 useless extension candidates. Maximal degree in co-relation 1979. Up to 346 conditions per place. [2024-06-21 17:22:38,822 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 72 selfloop transitions, 19 changer transitions 0/94 dead transitions. [2024-06-21 17:22:38,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 933 flow [2024-06-21 17:22:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-21 17:22:38,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 17:22:38,824 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 703 flow. Second operand 7 states and 77 transitions. [2024-06-21 17:22:38,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 933 flow [2024-06-21 17:22:38,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 861 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:38,832 INFO L231 Difference]: Finished difference. Result has 92 places, 80 transitions, 687 flow [2024-06-21 17:22:38,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=687, PETRI_PLACES=92, PETRI_TRANSITIONS=80} [2024-06-21 17:22:38,832 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 63 predicate places. [2024-06-21 17:22:38,833 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 80 transitions, 687 flow [2024-06-21 17:22:38,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:38,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:38,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:38,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:22:38,833 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:38,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:38,834 INFO L85 PathProgramCache]: Analyzing trace with hash 848023398, now seen corresponding path program 3 times [2024-06-21 17:22:38,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:38,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573560375] [2024-06-21 17:22:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:38,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:41,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:41,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573560375] [2024-06-21 17:22:41,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573560375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:41,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:41,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:41,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094877934] [2024-06-21 17:22:41,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:41,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:41,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:41,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:41,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 80 transitions, 687 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:41,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:41,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:41,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:41,778 INFO L124 PetriNetUnfolderBase]: 221/446 cut-off events. [2024-06-21 17:22:41,778 INFO L125 PetriNetUnfolderBase]: For 3383/3389 co-relation queries the response was YES. [2024-06-21 17:22:41,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 446 events. 221/446 cut-off events. For 3383/3389 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2050 event pairs, 35 based on Foata normal form. 6/449 useless extension candidates. Maximal degree in co-relation 1972. Up to 346 conditions per place. [2024-06-21 17:22:41,781 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 70 selfloop transitions, 20 changer transitions 0/93 dead transitions. [2024-06-21 17:22:41,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 93 transitions, 911 flow [2024-06-21 17:22:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2024-06-21 17:22:41,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 17:22:41,795 INFO L175 Difference]: Start difference. First operand has 92 places, 80 transitions, 687 flow. Second operand 7 states and 75 transitions. [2024-06-21 17:22:41,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 93 transitions, 911 flow [2024-06-21 17:22:41,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 93 transitions, 865 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:22:41,802 INFO L231 Difference]: Finished difference. Result has 94 places, 81 transitions, 699 flow [2024-06-21 17:22:41,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=699, PETRI_PLACES=94, PETRI_TRANSITIONS=81} [2024-06-21 17:22:41,803 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 65 predicate places. [2024-06-21 17:22:41,803 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 81 transitions, 699 flow [2024-06-21 17:22:41,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:41,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:41,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:41,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:22:41,804 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:41,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:41,804 INFO L85 PathProgramCache]: Analyzing trace with hash 848320068, now seen corresponding path program 4 times [2024-06-21 17:22:41,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:41,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127856290] [2024-06-21 17:22:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:41,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:43,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:43,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127856290] [2024-06-21 17:22:43,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127856290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:43,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:43,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:43,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099641930] [2024-06-21 17:22:43,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:44,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:44,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:44,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:44,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:44,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:44,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 81 transitions, 699 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:44,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:44,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:44,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:44,395 INFO L124 PetriNetUnfolderBase]: 218/441 cut-off events. [2024-06-21 17:22:44,395 INFO L125 PetriNetUnfolderBase]: For 2969/2975 co-relation queries the response was YES. [2024-06-21 17:22:44,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1953 conditions, 441 events. 218/441 cut-off events. For 2969/2975 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2017 event pairs, 34 based on Foata normal form. 6/444 useless extension candidates. Maximal degree in co-relation 1908. Up to 315 conditions per place. [2024-06-21 17:22:44,398 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 67 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-21 17:22:44,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 93 transitions, 911 flow [2024-06-21 17:22:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:22:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:22:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-06-21 17:22:44,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476190476190476 [2024-06-21 17:22:44,399 INFO L175 Difference]: Start difference. First operand has 94 places, 81 transitions, 699 flow. Second operand 7 states and 73 transitions. [2024-06-21 17:22:44,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 93 transitions, 911 flow [2024-06-21 17:22:44,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 93 transitions, 865 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:22:44,405 INFO L231 Difference]: Finished difference. Result has 96 places, 81 transitions, 703 flow [2024-06-21 17:22:44,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=703, PETRI_PLACES=96, PETRI_TRANSITIONS=81} [2024-06-21 17:22:44,406 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 67 predicate places. [2024-06-21 17:22:44,406 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 81 transitions, 703 flow [2024-06-21 17:22:44,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:44,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:44,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:44,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:22:44,407 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:44,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:44,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1423824624, now seen corresponding path program 1 times [2024-06-21 17:22:44,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:44,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385328420] [2024-06-21 17:22:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:44,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:46,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:46,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385328420] [2024-06-21 17:22:46,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385328420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:46,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:46,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:46,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948824542] [2024-06-21 17:22:46,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:46,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:46,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:46,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:46,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:46,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:46,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 81 transitions, 703 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:46,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:46,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:46,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:47,067 INFO L124 PetriNetUnfolderBase]: 259/531 cut-off events. [2024-06-21 17:22:47,068 INFO L125 PetriNetUnfolderBase]: For 6019/6021 co-relation queries the response was YES. [2024-06-21 17:22:47,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2401 conditions, 531 events. 259/531 cut-off events. For 6019/6021 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2546 event pairs, 49 based on Foata normal form. 10/540 useless extension candidates. Maximal degree in co-relation 2355. Up to 181 conditions per place. [2024-06-21 17:22:47,071 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 53 selfloop transitions, 39 changer transitions 18/113 dead transitions. [2024-06-21 17:22:47,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 113 transitions, 1063 flow [2024-06-21 17:22:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:22:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:22:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 17:22:47,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 17:22:47,072 INFO L175 Difference]: Start difference. First operand has 96 places, 81 transitions, 703 flow. Second operand 11 states and 121 transitions. [2024-06-21 17:22:47,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 113 transitions, 1063 flow [2024-06-21 17:22:47,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 113 transitions, 993 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:47,080 INFO L231 Difference]: Finished difference. Result has 101 places, 74 transitions, 643 flow [2024-06-21 17:22:47,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=643, PETRI_PLACES=101, PETRI_TRANSITIONS=74} [2024-06-21 17:22:47,082 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-06-21 17:22:47,082 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 74 transitions, 643 flow [2024-06-21 17:22:47,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:47,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:47,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:47,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:22:47,083 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:47,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:47,083 INFO L85 PathProgramCache]: Analyzing trace with hash 346699276, now seen corresponding path program 2 times [2024-06-21 17:22:47,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:47,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518119767] [2024-06-21 17:22:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:47,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:49,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:49,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518119767] [2024-06-21 17:22:49,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518119767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:49,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:49,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:49,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849889342] [2024-06-21 17:22:49,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:49,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:49,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:49,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:49,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:49,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:49,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 74 transitions, 643 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:49,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:49,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:49,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:50,092 INFO L124 PetriNetUnfolderBase]: 252/526 cut-off events. [2024-06-21 17:22:50,092 INFO L125 PetriNetUnfolderBase]: For 8347/8349 co-relation queries the response was YES. [2024-06-21 17:22:50,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2514 conditions, 526 events. 252/526 cut-off events. For 8347/8349 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2559 event pairs, 59 based on Foata normal form. 10/535 useless extension candidates. Maximal degree in co-relation 2467. Up to 249 conditions per place. [2024-06-21 17:22:50,095 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 53 selfloop transitions, 37 changer transitions 10/103 dead transitions. [2024-06-21 17:22:50,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 103 transitions, 975 flow [2024-06-21 17:22:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:22:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:22:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 126 transitions. [2024-06-21 17:22:50,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-21 17:22:50,097 INFO L175 Difference]: Start difference. First operand has 101 places, 74 transitions, 643 flow. Second operand 12 states and 126 transitions. [2024-06-21 17:22:50,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 103 transitions, 975 flow [2024-06-21 17:22:50,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 103 transitions, 884 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 17:22:50,104 INFO L231 Difference]: Finished difference. Result has 97 places, 69 transitions, 592 flow [2024-06-21 17:22:50,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=592, PETRI_PLACES=97, PETRI_TRANSITIONS=69} [2024-06-21 17:22:50,105 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2024-06-21 17:22:50,105 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 69 transitions, 592 flow [2024-06-21 17:22:50,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:50,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:50,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:50,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:22:50,106 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:50,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:50,106 INFO L85 PathProgramCache]: Analyzing trace with hash 433538956, now seen corresponding path program 3 times [2024-06-21 17:22:50,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:50,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744404700] [2024-06-21 17:22:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:50,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:52,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:52,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744404700] [2024-06-21 17:22:52,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744404700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:52,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:52,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:52,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291494584] [2024-06-21 17:22:52,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:52,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:52,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:52,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:52,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:52,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:52,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 69 transitions, 592 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:52,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:52,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:52,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:53,355 INFO L124 PetriNetUnfolderBase]: 213/453 cut-off events. [2024-06-21 17:22:53,356 INFO L125 PetriNetUnfolderBase]: For 6066/6068 co-relation queries the response was YES. [2024-06-21 17:22:53,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2047 conditions, 453 events. 213/453 cut-off events. For 6066/6068 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2120 event pairs, 50 based on Foata normal form. 12/464 useless extension candidates. Maximal degree in co-relation 2003. Up to 249 conditions per place. [2024-06-21 17:22:53,358 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 39 selfloop transitions, 29 changer transitions 21/92 dead transitions. [2024-06-21 17:22:53,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 92 transitions, 838 flow [2024-06-21 17:22:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:22:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:22:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-21 17:22:53,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424242424242424 [2024-06-21 17:22:53,359 INFO L175 Difference]: Start difference. First operand has 97 places, 69 transitions, 592 flow. Second operand 11 states and 113 transitions. [2024-06-21 17:22:53,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 92 transitions, 838 flow [2024-06-21 17:22:53,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 762 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 17:22:53,366 INFO L231 Difference]: Finished difference. Result has 95 places, 61 transitions, 503 flow [2024-06-21 17:22:53,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=503, PETRI_PLACES=95, PETRI_TRANSITIONS=61} [2024-06-21 17:22:53,367 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2024-06-21 17:22:53,367 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 61 transitions, 503 flow [2024-06-21 17:22:53,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:53,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:53,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:53,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:22:53,367 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:53,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:53,368 INFO L85 PathProgramCache]: Analyzing trace with hash 951110908, now seen corresponding path program 4 times [2024-06-21 17:22:53,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:53,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835835774] [2024-06-21 17:22:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:53,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:55,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:55,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835835774] [2024-06-21 17:22:55,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835835774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:55,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:55,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:55,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922926370] [2024-06-21 17:22:55,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:55,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:55,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:55,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:55,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 61 transitions, 503 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:55,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:55,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:55,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:56,724 INFO L124 PetriNetUnfolderBase]: 191/394 cut-off events. [2024-06-21 17:22:56,724 INFO L125 PetriNetUnfolderBase]: For 5462/5462 co-relation queries the response was YES. [2024-06-21 17:22:56,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1763 conditions, 394 events. 191/394 cut-off events. For 5462/5462 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1741 event pairs, 49 based on Foata normal form. 10/401 useless extension candidates. Maximal degree in co-relation 1720. Up to 260 conditions per place. [2024-06-21 17:22:56,727 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 47 selfloop transitions, 21 changer transitions 11/82 dead transitions. [2024-06-21 17:22:56,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 82 transitions, 719 flow [2024-06-21 17:22:56,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:22:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:22:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 118 transitions. [2024-06-21 17:22:56,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277777777777778 [2024-06-21 17:22:56,735 INFO L175 Difference]: Start difference. First operand has 95 places, 61 transitions, 503 flow. Second operand 12 states and 118 transitions. [2024-06-21 17:22:56,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 82 transitions, 719 flow [2024-06-21 17:22:56,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 82 transitions, 653 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 17:22:56,740 INFO L231 Difference]: Finished difference. Result has 90 places, 58 transitions, 459 flow [2024-06-21 17:22:56,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=90, PETRI_TRANSITIONS=58} [2024-06-21 17:22:56,741 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2024-06-21 17:22:56,741 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 58 transitions, 459 flow [2024-06-21 17:22:56,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:56,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:56,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:56,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:22:56,743 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:22:56,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:56,743 INFO L85 PathProgramCache]: Analyzing trace with hash -847761362, now seen corresponding path program 1 times [2024-06-21 17:22:56,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:56,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308878609] [2024-06-21 17:22:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:56,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:59,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:59,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308878609] [2024-06-21 17:22:59,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308878609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:59,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:59,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:22:59,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725710890] [2024-06-21 17:22:59,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:59,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:22:59,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:59,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:22:59,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:22:59,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:22:59,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 58 transitions, 459 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2024-06-21 17:22:59,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:59,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:22:59,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:00,145 INFO L124 PetriNetUnfolderBase]: 202/419 cut-off events. [2024-06-21 17:23:00,145 INFO L125 PetriNetUnfolderBase]: For 5081/5089 co-relation queries the response was YES. [2024-06-21 17:23:00,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 419 events. 202/419 cut-off events. For 5081/5089 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1920 event pairs, 58 based on Foata normal form. 14/430 useless extension candidates. Maximal degree in co-relation 1860. Up to 244 conditions per place. [2024-06-21 17:23:00,149 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 51 selfloop transitions, 18 changer transitions 10/82 dead transitions. [2024-06-21 17:23:00,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 82 transitions, 719 flow [2024-06-21 17:23:00,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:23:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:23:00,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 119 transitions. [2024-06-21 17:23:00,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33055555555555555 [2024-06-21 17:23:00,163 INFO L175 Difference]: Start difference. First operand has 90 places, 58 transitions, 459 flow. Second operand 12 states and 119 transitions. [2024-06-21 17:23:00,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 82 transitions, 719 flow [2024-06-21 17:23:00,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 82 transitions, 659 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 17:23:00,169 INFO L231 Difference]: Finished difference. Result has 88 places, 54 transitions, 412 flow [2024-06-21 17:23:00,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=412, PETRI_PLACES=88, PETRI_TRANSITIONS=54} [2024-06-21 17:23:00,169 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 59 predicate places. [2024-06-21 17:23:00,170 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 54 transitions, 412 flow [2024-06-21 17:23:00,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2024-06-21 17:23:00,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:00,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:00,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:23:00,170 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:23:00,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:00,171 INFO L85 PathProgramCache]: Analyzing trace with hash -853338944, now seen corresponding path program 5 times [2024-06-21 17:23:00,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:00,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674585253] [2024-06-21 17:23:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:00,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:02,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:02,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674585253] [2024-06-21 17:23:02,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674585253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:02,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:02,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:02,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105355227] [2024-06-21 17:23:02,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:02,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:02,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:02,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:02,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:23:02,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 54 transitions, 412 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:02,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:02,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:23:02,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:03,261 INFO L124 PetriNetUnfolderBase]: 171/358 cut-off events. [2024-06-21 17:23:03,261 INFO L125 PetriNetUnfolderBase]: For 3834/3842 co-relation queries the response was YES. [2024-06-21 17:23:03,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510 conditions, 358 events. 171/358 cut-off events. For 3834/3842 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1544 event pairs, 51 based on Foata normal form. 18/373 useless extension candidates. Maximal degree in co-relation 1470. Up to 244 conditions per place. [2024-06-21 17:23:03,267 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 42 selfloop transitions, 14 changer transitions 12/71 dead transitions. [2024-06-21 17:23:03,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 71 transitions, 596 flow [2024-06-21 17:23:03,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:23:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:23:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-21 17:23:03,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33 [2024-06-21 17:23:03,272 INFO L175 Difference]: Start difference. First operand has 88 places, 54 transitions, 412 flow. Second operand 10 states and 99 transitions. [2024-06-21 17:23:03,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 71 transitions, 596 flow [2024-06-21 17:23:03,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 71 transitions, 558 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 17:23:03,276 INFO L231 Difference]: Finished difference. Result has 84 places, 50 transitions, 363 flow [2024-06-21 17:23:03,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=363, PETRI_PLACES=84, PETRI_TRANSITIONS=50} [2024-06-21 17:23:03,276 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2024-06-21 17:23:03,277 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 50 transitions, 363 flow [2024-06-21 17:23:03,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:03,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:03,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:03,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:23:03,277 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:23:03,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash -853486814, now seen corresponding path program 6 times [2024-06-21 17:23:03,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:03,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730095622] [2024-06-21 17:23:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:03,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:05,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:05,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730095622] [2024-06-21 17:23:05,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730095622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:05,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:05,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:05,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859252006] [2024-06-21 17:23:05,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:05,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:05,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:05,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:05,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:05,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:23:05,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 50 transitions, 363 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:05,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:05,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:23:05,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:06,587 INFO L124 PetriNetUnfolderBase]: 157/332 cut-off events. [2024-06-21 17:23:06,588 INFO L125 PetriNetUnfolderBase]: For 3543/3543 co-relation queries the response was YES. [2024-06-21 17:23:06,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1393 conditions, 332 events. 157/332 cut-off events. For 3543/3543 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1391 event pairs, 45 based on Foata normal form. 8/337 useless extension candidates. Maximal degree in co-relation 1354. Up to 224 conditions per place. [2024-06-21 17:23:06,592 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 34 selfloop transitions, 8 changer transitions 21/66 dead transitions. [2024-06-21 17:23:06,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 66 transitions, 531 flow [2024-06-21 17:23:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:23:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:23:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2024-06-21 17:23:06,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-06-21 17:23:06,593 INFO L175 Difference]: Start difference. First operand has 84 places, 50 transitions, 363 flow. Second operand 10 states and 96 transitions. [2024-06-21 17:23:06,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 66 transitions, 531 flow [2024-06-21 17:23:06,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 66 transitions, 490 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 17:23:06,597 INFO L231 Difference]: Finished difference. Result has 81 places, 41 transitions, 253 flow [2024-06-21 17:23:06,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=253, PETRI_PLACES=81, PETRI_TRANSITIONS=41} [2024-06-21 17:23:06,598 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2024-06-21 17:23:06,598 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 41 transitions, 253 flow [2024-06-21 17:23:06,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:06,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:06,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:06,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:23:06,598 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:23:06,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:06,599 INFO L85 PathProgramCache]: Analyzing trace with hash 518914986, now seen corresponding path program 2 times [2024-06-21 17:23:06,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:06,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782918221] [2024-06-21 17:23:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:06,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:09,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:09,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782918221] [2024-06-21 17:23:09,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782918221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:09,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:09,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:23:09,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54884510] [2024-06-21 17:23:09,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:09,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:23:09,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:23:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:23:09,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:23:09,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 41 transitions, 253 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2024-06-21 17:23:09,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:09,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:23:09,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:10,116 INFO L124 PetriNetUnfolderBase]: 127/269 cut-off events. [2024-06-21 17:23:10,116 INFO L125 PetriNetUnfolderBase]: For 3151/3151 co-relation queries the response was YES. [2024-06-21 17:23:10,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 269 events. 127/269 cut-off events. For 3151/3151 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1095 event pairs, 34 based on Foata normal form. 10/278 useless extension candidates. Maximal degree in co-relation 1015. Up to 153 conditions per place. [2024-06-21 17:23:10,119 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 27 selfloop transitions, 16 changer transitions 11/57 dead transitions. [2024-06-21 17:23:10,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 57 transitions, 405 flow [2024-06-21 17:23:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:23:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:23:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-21 17:23:10,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33 [2024-06-21 17:23:10,120 INFO L175 Difference]: Start difference. First operand has 81 places, 41 transitions, 253 flow. Second operand 10 states and 99 transitions. [2024-06-21 17:23:10,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 57 transitions, 405 flow [2024-06-21 17:23:10,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 57 transitions, 364 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-21 17:23:10,123 INFO L231 Difference]: Finished difference. Result has 68 places, 38 transitions, 233 flow [2024-06-21 17:23:10,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=233, PETRI_PLACES=68, PETRI_TRANSITIONS=38} [2024-06-21 17:23:10,124 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2024-06-21 17:23:10,124 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 38 transitions, 233 flow [2024-06-21 17:23:10,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2024-06-21 17:23:10,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:10,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:10,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:23:10,125 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:23:10,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:10,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1787413418, now seen corresponding path program 3 times [2024-06-21 17:23:10,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:10,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277216260] [2024-06-21 17:23:10,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:10,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:13,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:13,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277216260] [2024-06-21 17:23:13,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277216260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:13,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:13,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:23:13,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581939822] [2024-06-21 17:23:13,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:13,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:23:13,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:23:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:23:13,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:23:13,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 38 transitions, 233 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2024-06-21 17:23:13,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:13,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:23:13,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:13,843 INFO L124 PetriNetUnfolderBase]: 117/251 cut-off events. [2024-06-21 17:23:13,843 INFO L125 PetriNetUnfolderBase]: For 3032/3036 co-relation queries the response was YES. [2024-06-21 17:23:13,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 251 events. 117/251 cut-off events. For 3032/3036 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1018 event pairs, 39 based on Foata normal form. 14/264 useless extension candidates. Maximal degree in co-relation 965. Up to 161 conditions per place. [2024-06-21 17:23:13,845 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 26 selfloop transitions, 11 changer transitions 11/51 dead transitions. [2024-06-21 17:23:13,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 51 transitions, 367 flow [2024-06-21 17:23:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2024-06-21 17:23:13,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32592592592592595 [2024-06-21 17:23:13,847 INFO L175 Difference]: Start difference. First operand has 68 places, 38 transitions, 233 flow. Second operand 9 states and 88 transitions. [2024-06-21 17:23:13,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 51 transitions, 367 flow [2024-06-21 17:23:13,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 51 transitions, 329 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 17:23:13,851 INFO L231 Difference]: Finished difference. Result has 65 places, 35 transitions, 202 flow [2024-06-21 17:23:13,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=202, PETRI_PLACES=65, PETRI_TRANSITIONS=35} [2024-06-21 17:23:13,852 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2024-06-21 17:23:13,852 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 35 transitions, 202 flow [2024-06-21 17:23:13,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2024-06-21 17:23:13,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:13,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:13,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:23:13,852 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:23:13,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:13,853 INFO L85 PathProgramCache]: Analyzing trace with hash 518922426, now seen corresponding path program 4 times [2024-06-21 17:23:13,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:13,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110615388] [2024-06-21 17:23:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:13,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:16,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:16,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110615388] [2024-06-21 17:23:16,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110615388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:16,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:16,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:23:16,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688586821] [2024-06-21 17:23:16,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:16,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:23:16,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:16,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:23:16,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:23:16,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:23:16,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 35 transitions, 202 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2024-06-21 17:23:16,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:16,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:23:16,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:17,286 INFO L124 PetriNetUnfolderBase]: 99/221 cut-off events. [2024-06-21 17:23:17,287 INFO L125 PetriNetUnfolderBase]: For 2544/2548 co-relation queries the response was YES. [2024-06-21 17:23:17,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 221 events. 99/221 cut-off events. For 2544/2548 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 856 event pairs, 30 based on Foata normal form. 10/230 useless extension candidates. Maximal degree in co-relation 841. Up to 137 conditions per place. [2024-06-21 17:23:17,288 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 24 selfloop transitions, 11 changer transitions 11/49 dead transitions. [2024-06-21 17:23:17,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 49 transitions, 326 flow [2024-06-21 17:23:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:23:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:23:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-06-21 17:23:17,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31333333333333335 [2024-06-21 17:23:17,289 INFO L175 Difference]: Start difference. First operand has 65 places, 35 transitions, 202 flow. Second operand 10 states and 94 transitions. [2024-06-21 17:23:17,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 49 transitions, 326 flow [2024-06-21 17:23:17,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 49 transitions, 300 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 17:23:17,292 INFO L231 Difference]: Finished difference. Result has 64 places, 32 transitions, 186 flow [2024-06-21 17:23:17,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=186, PETRI_PLACES=64, PETRI_TRANSITIONS=32} [2024-06-21 17:23:17,292 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-06-21 17:23:17,292 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 32 transitions, 186 flow [2024-06-21 17:23:17,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2024-06-21 17:23:17,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:17,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:17,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:23:17,293 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:23:17,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash 528119196, now seen corresponding path program 5 times [2024-06-21 17:23:17,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:17,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275599930] [2024-06-21 17:23:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:17,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:19,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:19,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275599930] [2024-06-21 17:23:19,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275599930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:19,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:19,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:23:19,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248946998] [2024-06-21 17:23:19,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:19,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:23:19,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:19,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:23:19,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:23:19,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:23:19,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 32 transitions, 186 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2024-06-21 17:23:19,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:19,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:23:19,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:20,603 INFO L124 PetriNetUnfolderBase]: 111/249 cut-off events. [2024-06-21 17:23:20,604 INFO L125 PetriNetUnfolderBase]: For 2992/2992 co-relation queries the response was YES. [2024-06-21 17:23:20,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 249 events. 111/249 cut-off events. For 2992/2992 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1008 event pairs, 46 based on Foata normal form. 6/254 useless extension candidates. Maximal degree in co-relation 1005. Up to 114 conditions per place. [2024-06-21 17:23:20,605 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 28 selfloop transitions, 9 changer transitions 10/50 dead transitions. [2024-06-21 17:23:20,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 50 transitions, 356 flow [2024-06-21 17:23:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:23:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:23:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2024-06-21 17:23:20,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-06-21 17:23:20,606 INFO L175 Difference]: Start difference. First operand has 64 places, 32 transitions, 186 flow. Second operand 10 states and 96 transitions. [2024-06-21 17:23:20,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 50 transitions, 356 flow [2024-06-21 17:23:20,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 318 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 17:23:20,608 INFO L231 Difference]: Finished difference. Result has 60 places, 28 transitions, 155 flow [2024-06-21 17:23:20,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=155, PETRI_PLACES=60, PETRI_TRANSITIONS=28} [2024-06-21 17:23:20,609 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2024-06-21 17:23:20,609 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 28 transitions, 155 flow [2024-06-21 17:23:20,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2024-06-21 17:23:20,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:20,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:20,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:23:20,610 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:23:20,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:20,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1787420858, now seen corresponding path program 6 times [2024-06-21 17:23:20,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:20,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297889067] [2024-06-21 17:23:20,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:20,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:23,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:23,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297889067] [2024-06-21 17:23:23,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297889067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:23,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:23,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:23:23,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276998630] [2024-06-21 17:23:23,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:23,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:23:23,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:23,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:23:23,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:23:23,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:23:23,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 28 transitions, 155 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2024-06-21 17:23:23,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:23,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:23:23,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:24,038 INFO L124 PetriNetUnfolderBase]: 84/188 cut-off events. [2024-06-21 17:23:24,038 INFO L125 PetriNetUnfolderBase]: For 1793/1797 co-relation queries the response was YES. [2024-06-21 17:23:24,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 188 events. 84/188 cut-off events. For 1793/1797 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 679 event pairs, 32 based on Foata normal form. 10/197 useless extension candidates. Maximal degree in co-relation 721. Up to 71 conditions per place. [2024-06-21 17:23:24,039 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 25 selfloop transitions, 8 changer transitions 7/43 dead transitions. [2024-06-21 17:23:24,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 43 transitions, 299 flow [2024-06-21 17:23:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:24,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:24,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2024-06-21 17:23:24,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3148148148148148 [2024-06-21 17:23:24,041 INFO L175 Difference]: Start difference. First operand has 60 places, 28 transitions, 155 flow. Second operand 9 states and 85 transitions. [2024-06-21 17:23:24,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 43 transitions, 299 flow [2024-06-21 17:23:24,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 43 transitions, 258 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-21 17:23:24,042 INFO L231 Difference]: Finished difference. Result has 52 places, 25 transitions, 126 flow [2024-06-21 17:23:24,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=126, PETRI_PLACES=52, PETRI_TRANSITIONS=25} [2024-06-21 17:23:24,043 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2024-06-21 17:23:24,043 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 25 transitions, 126 flow [2024-06-21 17:23:24,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2024-06-21 17:23:24,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:24,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:24,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:23:24,043 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:23:24,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:24,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1781843276, now seen corresponding path program 7 times [2024-06-21 17:23:24,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:24,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335264167] [2024-06-21 17:23:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:24,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:26,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:26,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335264167] [2024-06-21 17:23:26,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335264167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:26,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:26,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:26,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394027723] [2024-06-21 17:23:26,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:26,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:26,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:26,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:26,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:23:26,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 25 transitions, 126 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:26,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:26,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:23:26,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:26,684 INFO L124 PetriNetUnfolderBase]: 55/125 cut-off events. [2024-06-21 17:23:26,685 INFO L125 PetriNetUnfolderBase]: For 789/789 co-relation queries the response was YES. [2024-06-21 17:23:26,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 125 events. 55/125 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 350 event pairs, 23 based on Foata normal form. 10/134 useless extension candidates. Maximal degree in co-relation 414. Up to 57 conditions per place. [2024-06-21 17:23:26,685 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 16 selfloop transitions, 5 changer transitions 11/35 dead transitions. [2024-06-21 17:23:26,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 35 transitions, 214 flow [2024-06-21 17:23:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 73 transitions. [2024-06-21 17:23:26,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30416666666666664 [2024-06-21 17:23:26,686 INFO L175 Difference]: Start difference. First operand has 52 places, 25 transitions, 126 flow. Second operand 8 states and 73 transitions. [2024-06-21 17:23:26,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 35 transitions, 214 flow [2024-06-21 17:23:26,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 35 transitions, 192 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 17:23:26,687 INFO L231 Difference]: Finished difference. Result has 48 places, 21 transitions, 91 flow [2024-06-21 17:23:26,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=91, PETRI_PLACES=48, PETRI_TRANSITIONS=21} [2024-06-21 17:23:26,688 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2024-06-21 17:23:26,689 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 21 transitions, 91 flow [2024-06-21 17:23:26,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:26,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:26,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:26,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:23:26,689 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:23:26,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:26,690 INFO L85 PathProgramCache]: Analyzing trace with hash 34214046, now seen corresponding path program 8 times [2024-06-21 17:23:26,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:26,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675536968] [2024-06-21 17:23:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:26,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:29,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:29,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675536968] [2024-06-21 17:23:29,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675536968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:29,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:29,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:29,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101548401] [2024-06-21 17:23:29,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:29,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:29,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:29,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:29,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:29,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-21 17:23:29,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 21 transitions, 91 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:29,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:29,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-21 17:23:29,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:29,653 INFO L124 PetriNetUnfolderBase]: 21/59 cut-off events. [2024-06-21 17:23:29,653 INFO L125 PetriNetUnfolderBase]: For 221/221 co-relation queries the response was YES. [2024-06-21 17:23:29,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 59 events. 21/59 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 1 based on Foata normal form. 8/66 useless extension candidates. Maximal degree in co-relation 154. Up to 32 conditions per place. [2024-06-21 17:23:29,653 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2024-06-21 17:23:29,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 25 transitions, 129 flow [2024-06-21 17:23:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 63 transitions. [2024-06-21 17:23:29,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2625 [2024-06-21 17:23:29,654 INFO L175 Difference]: Start difference. First operand has 48 places, 21 transitions, 91 flow. Second operand 8 states and 63 transitions. [2024-06-21 17:23:29,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 25 transitions, 129 flow [2024-06-21 17:23:29,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 25 transitions, 103 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 17:23:29,655 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2024-06-21 17:23:29,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2024-06-21 17:23:29,655 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2024-06-21 17:23:29,655 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2024-06-21 17:23:29,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:29,657 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 17:23:29,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 17:23:29,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 17:23:29,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 17:23:29,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:23:29,658 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:29,660 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 17:23:29,660 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 17:23:29,663 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 17:23:29,663 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 17:23:29,663 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 05:23:29 BasicIcfg [2024-06-21 17:23:29,663 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 17:23:29,664 INFO L158 Benchmark]: Toolchain (without parser) took 117403.20ms. Allocated memory was 161.5MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 131.3MB in the beginning and 966.3MB in the end (delta: -835.0MB). Peak memory consumption was 242.7MB. Max. memory is 16.1GB. [2024-06-21 17:23:29,667 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 134.2MB. Free memory is still 97.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 17:23:29,668 INFO L158 Benchmark]: Witness Parser took 0.12ms. Allocated memory is still 134.2MB. Free memory is still 60.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 17:23:29,668 INFO L158 Benchmark]: CACSL2BoogieTranslator took 558.74ms. Allocated memory is still 161.5MB. Free memory was 131.3MB in the beginning and 92.3MB in the end (delta: 39.0MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2024-06-21 17:23:29,668 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.99ms. Allocated memory is still 161.5MB. Free memory was 92.3MB in the beginning and 89.4MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 17:23:29,669 INFO L158 Benchmark]: Boogie Preprocessor took 60.39ms. Allocated memory is still 161.5MB. Free memory was 89.4MB in the beginning and 85.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 17:23:29,669 INFO L158 Benchmark]: RCFGBuilder took 816.22ms. Allocated memory is still 161.5MB. Free memory was 85.2MB in the beginning and 111.7MB in the end (delta: -26.5MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. [2024-06-21 17:23:29,669 INFO L158 Benchmark]: TraceAbstraction took 115884.77ms. Allocated memory was 161.5MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 110.6MB in the beginning and 966.3MB in the end (delta: -855.7MB). Peak memory consumption was 222.2MB. Max. memory is 16.1GB. [2024-06-21 17:23:29,670 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 134.2MB. Free memory is still 97.8MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.12ms. Allocated memory is still 134.2MB. Free memory is still 60.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 558.74ms. Allocated memory is still 161.5MB. Free memory was 131.3MB in the beginning and 92.3MB in the end (delta: 39.0MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 76.99ms. Allocated memory is still 161.5MB. Free memory was 92.3MB in the beginning and 89.4MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.39ms. Allocated memory is still 161.5MB. Free memory was 89.4MB in the beginning and 85.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 816.22ms. Allocated memory is still 161.5MB. Free memory was 85.2MB in the beginning and 111.7MB in the end (delta: -26.5MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. * TraceAbstraction took 115884.77ms. Allocated memory was 161.5MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 110.6MB in the beginning and 966.3MB in the end (delta: -855.7MB). Peak memory consumption was 222.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 816]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 817]: 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, 47 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: 115.8s, OverallIterations: 41, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 25.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1220 SdHoareTripleChecker+Valid, 7.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1118 mSDsluCounter, 729 SdHoareTripleChecker+Invalid, 6.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 566 mSDsCounter, 378 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6801 IncrementalHoareTripleChecker+Invalid, 7179 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 378 mSolverCounterUnsat, 163 mSDtfsCounter, 6801 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 422 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 39.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=704occurred in iteration=21, InterpolantAutomatonStates: 338, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 89.3s InterpolantComputationTime, 612 NumberOfCodeBlocks, 612 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 571 ConstructedInterpolants, 0 QuantifiedInterpolants, 71479 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 41 InterpolantComputations, 41 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! [2024-06-21 17:23:29,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE