./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.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/mix051_pso.opt_rmo.opt_tso.opt.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/mix051_pso.opt_rmo.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix051_pso.opt_rmo.opt_tso.opt.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 16:59:07,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:59:07,785 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:59:07,792 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:59:07,792 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:59:07,818 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:59:07,818 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:59:07,819 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:59:07,819 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:59:07,822 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:59:07,823 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:59:07,823 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:59:07,824 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:59:07,825 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:59:07,825 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:59:07,825 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:59:07,825 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:59:07,826 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:59:07,826 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:59:07,826 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:59:07,826 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:59:07,827 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:59:07,827 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:59:07,827 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:59:07,828 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:59:07,828 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:59:07,829 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:59:07,829 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:59:07,829 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:59:07,829 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:59:07,830 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:59:07,830 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:59:07,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:59:07,831 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:59:07,831 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:59:07,831 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:59:07,831 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:59:07,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:59:07,832 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:59:07,832 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:59:07,832 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:59:07,832 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:59:07,833 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:59:07,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:59:08,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:59:08,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:59:08,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:59:08,069 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:59:08,083 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:59:08,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix051_pso.opt_rmo.opt_tso.opt.yml/witness.yml [2024-06-21 16:59:08,277 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:59:08,277 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:59:08,279 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-21 16:59:09,234 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:59:09,514 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:59:09,517 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-21 16:59:09,536 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79c5228c8/bcc2bd49345f4ad59ab085d05479d0b2/FLAG95a24242a [2024-06-21 16:59:09,549 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79c5228c8/bcc2bd49345f4ad59ab085d05479d0b2 [2024-06-21 16:59:09,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:59:09,551 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:59:09,553 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:59:09,553 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:59:09,557 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:59:09,557 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:59:08" (1/2) ... [2024-06-21 16:59:09,558 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20309c2b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:59:09, skipping insertion in model container [2024-06-21 16:59:09,559 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:59:08" (1/2) ... [2024-06-21 16:59:09,560 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c35698f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:59:09, skipping insertion in model container [2024-06-21 16:59:09,560 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:59:09" (2/2) ... [2024-06-21 16:59:09,560 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20309c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:09, skipping insertion in model container [2024-06-21 16:59:09,561 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:59:09" (2/2) ... [2024-06-21 16:59:09,561 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:59:09,657 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:59:09,659 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 16:59:09,659 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 16:59:09,659 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 16:59:09,659 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 16:59:09,659 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:59:09,660 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-21 16:59:09,692 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:59:10,025 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:59:10,033 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:59:10,142 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:59:10,186 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:59:10,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10 WrapperNode [2024-06-21 16:59:10,187 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:59:10,188 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:59:10,188 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:59:10,188 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:59:10,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (1/1) ... [2024-06-21 16:59:10,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (1/1) ... [2024-06-21 16:59:10,241 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-21 16:59:10,242 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:59:10,243 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:59:10,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:59:10,243 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:59:10,251 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (1/1) ... [2024-06-21 16:59:10,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (1/1) ... [2024-06-21 16:59:10,260 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (1/1) ... [2024-06-21 16:59:10,280 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:59:10,281 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (1/1) ... [2024-06-21 16:59:10,281 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (1/1) ... [2024-06-21 16:59:10,291 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (1/1) ... [2024-06-21 16:59:10,313 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (1/1) ... [2024-06-21 16:59:10,314 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (1/1) ... [2024-06-21 16:59:10,321 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (1/1) ... [2024-06-21 16:59:10,323 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:59:10,324 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:59:10,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:59:10,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:59:10,326 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (1/1) ... [2024-06-21 16:59:10,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:59:10,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:59:10,350 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 16:59:10,356 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 16:59:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:59:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:59:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:59:10,378 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:59:10,379 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:59:10,379 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:59:10,379 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:59:10,379 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:59:10,379 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 16:59:10,379 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 16:59:10,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:59:10,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:59:10,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:59:10,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:59:10,381 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 16:59:10,508 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:59:10,510 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:59:10,865 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:59:10,865 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:59:10,979 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:59:10,979 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:59:10,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:59:10 BoogieIcfgContainer [2024-06-21 16:59:10,980 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:59:10,981 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:59:10,981 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:59:10,983 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:59:10,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:59:08" (1/4) ... [2024-06-21 16:59:10,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5081295f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:59:10, skipping insertion in model container [2024-06-21 16:59:10,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:59:09" (2/4) ... [2024-06-21 16:59:10,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5081295f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:59:10, skipping insertion in model container [2024-06-21 16:59:10,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:59:10" (3/4) ... [2024-06-21 16:59:10,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5081295f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:59:10, skipping insertion in model container [2024-06-21 16:59:10,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:59:10" (4/4) ... [2024-06-21 16:59:10,986 INFO L112 eAbstractionObserver]: Analyzing ICFG mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-21 16:59:11,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:59:11,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 16:59:11,001 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:59:11,035 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:59:11,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 16:59:11,078 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-21 16:59:11,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:59:11,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:59:11,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 16:59:11,083 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-21 16:59:11,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:59:11,094 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;@7a329905, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:59:11,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 16:59:11,097 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:59:11,097 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 16:59:11,097 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:59:11,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:11,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:59:11,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:11,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:11,102 INFO L85 PathProgramCache]: Analyzing trace with hash 373213845, now seen corresponding path program 1 times [2024-06-21 16:59:11,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:11,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190416011] [2024-06-21 16:59:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:11,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:12,038 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 16:59:12,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:12,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190416011] [2024-06-21 16:59:12,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190416011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:12,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:12,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:59:12,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479101169] [2024-06-21 16:59:12,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:12,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:59:12,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:12,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:59:12,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:59:12,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-21 16:59:12,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:12,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:12,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-21 16:59:12,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:12,892 INFO L124 PetriNetUnfolderBase]: 5296/7608 cut-off events. [2024-06-21 16:59:12,893 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-06-21 16:59:12,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15159 conditions, 7608 events. 5296/7608 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 42812 event pairs, 3946 based on Foata normal form. 1/7420 useless extension candidates. Maximal degree in co-relation 15146. Up to 7282 conditions per place. [2024-06-21 16:59:12,965 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 40 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-21 16:59:12,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 221 flow [2024-06-21 16:59:12,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:59:12,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:59:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-21 16:59:12,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6535947712418301 [2024-06-21 16:59:12,976 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 100 transitions. [2024-06-21 16:59:12,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 221 flow [2024-06-21 16:59:12,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:59:12,981 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-21 16:59:12,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 16:59:12,984 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-21 16:59:12,984 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-21 16:59:12,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:12,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:12,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:12,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:59:12,985 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:12,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:12,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2118699822, now seen corresponding path program 1 times [2024-06-21 16:59:12,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:12,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459277002] [2024-06-21 16:59:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:13,545 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 16:59:13,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:13,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459277002] [2024-06-21 16:59:13,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459277002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:13,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:13,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:59:13,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490896111] [2024-06-21 16:59:13,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:13,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:59:13,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:13,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:59:13,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:59:13,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-21 16:59:13,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 16:59:13,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:13,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-21 16:59:13,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:14,332 INFO L124 PetriNetUnfolderBase]: 6191/8655 cut-off events. [2024-06-21 16:59:14,333 INFO L125 PetriNetUnfolderBase]: For 1762/1762 co-relation queries the response was YES. [2024-06-21 16:59:14,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19893 conditions, 8655 events. 6191/8655 cut-off events. For 1762/1762 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 47391 event pairs, 4100 based on Foata normal form. 4/8601 useless extension candidates. Maximal degree in co-relation 19881. Up to 8452 conditions per place. [2024-06-21 16:59:14,457 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 51 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-21 16:59:14,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 315 flow [2024-06-21 16:59:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:59:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:59:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-21 16:59:14,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-06-21 16:59:14,464 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 128 transitions. [2024-06-21 16:59:14,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 315 flow [2024-06-21 16:59:14,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:59:14,467 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-21 16:59:14,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 16:59:14,469 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-21 16:59:14,469 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-21 16:59:14,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 16:59:14,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:14,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:14,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:59:14,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:14,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1255184382, now seen corresponding path program 1 times [2024-06-21 16:59:14,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:14,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225188099] [2024-06-21 16:59:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:14,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:15,083 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 16:59:15,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:15,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225188099] [2024-06-21 16:59:15,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225188099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:15,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:15,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:59:15,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170857338] [2024-06-21 16:59:15,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:15,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:59:15,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:15,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:59:15,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:59:15,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-21 16:59:15,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 16:59:15,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:15,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-21 16:59:15,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:15,954 INFO L124 PetriNetUnfolderBase]: 6209/8722 cut-off events. [2024-06-21 16:59:15,954 INFO L125 PetriNetUnfolderBase]: For 5064/5064 co-relation queries the response was YES. [2024-06-21 16:59:15,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22473 conditions, 8722 events. 6209/8722 cut-off events. For 5064/5064 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 48031 event pairs, 3061 based on Foata normal form. 7/8704 useless extension candidates. Maximal degree in co-relation 22459. Up to 8373 conditions per place. [2024-06-21 16:59:15,999 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 69 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-21 16:59:15,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 531 flow [2024-06-21 16:59:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:59:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:59:16,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 168 transitions. [2024-06-21 16:59:16,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2024-06-21 16:59:16,001 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 168 transitions. [2024-06-21 16:59:16,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 531 flow [2024-06-21 16:59:16,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 512 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 16:59:16,004 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-21 16:59:16,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-21 16:59:16,005 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-21 16:59:16,005 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-21 16:59:16,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 16:59:16,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:16,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:16,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:59:16,006 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:16,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:16,006 INFO L85 PathProgramCache]: Analyzing trace with hash -205233313, now seen corresponding path program 1 times [2024-06-21 16:59:16,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:16,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002789021] [2024-06-21 16:59:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:16,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:16,644 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 16:59:16,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:16,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002789021] [2024-06-21 16:59:16,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002789021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:16,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:16,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:59:16,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271018807] [2024-06-21 16:59:16,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:16,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:59:16,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:16,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:59:16,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:59:16,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-21 16:59:16,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:16,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:16,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-21 16:59:16,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:17,630 INFO L124 PetriNetUnfolderBase]: 6351/8942 cut-off events. [2024-06-21 16:59:17,630 INFO L125 PetriNetUnfolderBase]: For 12467/12486 co-relation queries the response was YES. [2024-06-21 16:59:17,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27267 conditions, 8942 events. 6351/8942 cut-off events. For 12467/12486 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 49795 event pairs, 2386 based on Foata normal form. 48/8963 useless extension candidates. Maximal degree in co-relation 27250. Up to 8365 conditions per place. [2024-06-21 16:59:17,679 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 79 selfloop transitions, 24 changer transitions 0/112 dead transitions. [2024-06-21 16:59:17,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 112 transitions, 686 flow [2024-06-21 16:59:17,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:59:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:59:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-06-21 16:59:17,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6437908496732027 [2024-06-21 16:59:17,681 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 197 transitions. [2024-06-21 16:59:17,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 112 transitions, 686 flow [2024-06-21 16:59:17,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 112 transitions, 674 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 16:59:17,688 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 377 flow [2024-06-21 16:59:17,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-21 16:59:17,690 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-21 16:59:17,690 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 377 flow [2024-06-21 16:59:17,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:17,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:17,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:17,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:59:17,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:17,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:17,691 INFO L85 PathProgramCache]: Analyzing trace with hash -351027276, now seen corresponding path program 1 times [2024-06-21 16:59:17,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:17,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301123511] [2024-06-21 16:59:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:17,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:18,338 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 16:59:18,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:18,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301123511] [2024-06-21 16:59:18,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301123511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:18,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:18,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:59:18,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429687514] [2024-06-21 16:59:18,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:18,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:59:18,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:18,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:59:18,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:59:18,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-21 16:59:18,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 377 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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 16:59:18,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:18,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-21 16:59:18,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:19,266 INFO L124 PetriNetUnfolderBase]: 5437/7897 cut-off events. [2024-06-21 16:59:19,267 INFO L125 PetriNetUnfolderBase]: For 15553/15581 co-relation queries the response was YES. [2024-06-21 16:59:19,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25886 conditions, 7897 events. 5437/7897 cut-off events. For 15553/15581 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 45435 event pairs, 2456 based on Foata normal form. 3/7879 useless extension candidates. Maximal degree in co-relation 25865. Up to 7488 conditions per place. [2024-06-21 16:59:19,312 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 63 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-21 16:59:19,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 567 flow [2024-06-21 16:59:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:59:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:59:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 16:59:19,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254901960784314 [2024-06-21 16:59:19,313 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 377 flow. Second operand 5 states and 134 transitions. [2024-06-21 16:59:19,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 567 flow [2024-06-21 16:59:19,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 506 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:59:19,320 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 347 flow [2024-06-21 16:59:19,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-21 16:59:19,320 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-21 16:59:19,321 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 347 flow [2024-06-21 16:59:19,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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 16:59:19,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:19,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:19,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:59:19,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:19,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash -78198259, now seen corresponding path program 1 times [2024-06-21 16:59:19,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:19,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665674205] [2024-06-21 16:59:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:19,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:19,984 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 16:59:19,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:19,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665674205] [2024-06-21 16:59:19,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665674205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:19,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:19,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:59:19,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223728376] [2024-06-21 16:59:19,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:19,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:59:19,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:59:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:59:20,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 16:59:20,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 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 16:59:20,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:20,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 16:59:20,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:21,034 INFO L124 PetriNetUnfolderBase]: 6355/8944 cut-off events. [2024-06-21 16:59:21,034 INFO L125 PetriNetUnfolderBase]: For 21038/21058 co-relation queries the response was YES. [2024-06-21 16:59:21,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29779 conditions, 8944 events. 6355/8944 cut-off events. For 21038/21058 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 49667 event pairs, 2932 based on Foata normal form. 24/8947 useless extension candidates. Maximal degree in co-relation 29756. Up to 8595 conditions per place. [2024-06-21 16:59:21,084 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 66 selfloop transitions, 25 changer transitions 0/99 dead transitions. [2024-06-21 16:59:21,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 666 flow [2024-06-21 16:59:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:59:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:59:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 16:59:21,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2024-06-21 16:59:21,085 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 347 flow. Second operand 6 states and 165 transitions. [2024-06-21 16:59:21,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 666 flow [2024-06-21 16:59:21,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 637 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:59:21,093 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 414 flow [2024-06-21 16:59:21,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=414, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-21 16:59:21,095 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-21 16:59:21,095 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 414 flow [2024-06-21 16:59:21,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 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 16:59:21,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:21,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:21,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:59:21,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:21,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1965254995, now seen corresponding path program 2 times [2024-06-21 16:59:21,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:21,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050302503] [2024-06-21 16:59:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:21,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:21,689 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 16:59:21,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:21,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050302503] [2024-06-21 16:59:21,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050302503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:21,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:21,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:59:21,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549202367] [2024-06-21 16:59:21,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:21,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:59:21,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:21,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:59:21,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:59:21,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 16:59:21,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 414 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 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 16:59:21,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:21,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 16:59:21,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:22,717 INFO L124 PetriNetUnfolderBase]: 6310/8871 cut-off events. [2024-06-21 16:59:22,717 INFO L125 PetriNetUnfolderBase]: For 25004/25026 co-relation queries the response was YES. [2024-06-21 16:59:22,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30365 conditions, 8871 events. 6310/8871 cut-off events. For 25004/25026 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 48985 event pairs, 2946 based on Foata normal form. 23/8867 useless extension candidates. Maximal degree in co-relation 30342. Up to 8526 conditions per place. [2024-06-21 16:59:22,775 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 59 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-21 16:59:22,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 646 flow [2024-06-21 16:59:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:59:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:59:22,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 16:59:22,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2024-06-21 16:59:22,777 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 414 flow. Second operand 6 states and 160 transitions. [2024-06-21 16:59:22,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 646 flow [2024-06-21 16:59:22,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 603 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:59:22,788 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 434 flow [2024-06-21 16:59:22,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-06-21 16:59:22,789 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2024-06-21 16:59:22,789 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 434 flow [2024-06-21 16:59:22,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 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 16:59:22,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:22,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:22,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:59:22,790 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:22,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1558989351, now seen corresponding path program 1 times [2024-06-21 16:59:22,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:22,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363757367] [2024-06-21 16:59:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:22,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:23,537 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 16:59:23,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:23,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363757367] [2024-06-21 16:59:23,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363757367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:23,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:23,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:59:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875304121] [2024-06-21 16:59:23,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:23,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:59:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:23,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:59:23,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:59:23,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 16:59:23,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 434 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 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 16:59:23,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:23,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 16:59:23,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:24,913 INFO L124 PetriNetUnfolderBase]: 6889/9838 cut-off events. [2024-06-21 16:59:24,913 INFO L125 PetriNetUnfolderBase]: For 30543/30543 co-relation queries the response was YES. [2024-06-21 16:59:24,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33613 conditions, 9838 events. 6889/9838 cut-off events. For 30543/30543 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 54859 event pairs, 3133 based on Foata normal form. 6/9828 useless extension candidates. Maximal degree in co-relation 33589. Up to 9382 conditions per place. [2024-06-21 16:59:24,982 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 83 selfloop transitions, 17 changer transitions 0/108 dead transitions. [2024-06-21 16:59:24,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 108 transitions, 771 flow [2024-06-21 16:59:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 16:59:24,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042016806722689 [2024-06-21 16:59:24,984 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 434 flow. Second operand 7 states and 180 transitions. [2024-06-21 16:59:24,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 108 transitions, 771 flow [2024-06-21 16:59:25,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 680 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:59:25,009 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 455 flow [2024-06-21 16:59:25,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-21 16:59:25,010 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2024-06-21 16:59:25,010 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 455 flow [2024-06-21 16:59:25,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 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 16:59:25,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:25,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:25,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:59:25,011 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:25,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1464977718, now seen corresponding path program 1 times [2024-06-21 16:59:25,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:25,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274678194] [2024-06-21 16:59:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:25,580 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 16:59:25,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:25,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274678194] [2024-06-21 16:59:25,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274678194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:25,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:25,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:59:25,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782793970] [2024-06-21 16:59:25,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:25,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:59:25,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:25,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:59:25,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:59:25,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 16:59:25,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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 16:59:25,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:25,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 16:59:25,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:26,607 INFO L124 PetriNetUnfolderBase]: 6875/10012 cut-off events. [2024-06-21 16:59:26,607 INFO L125 PetriNetUnfolderBase]: For 37845/37845 co-relation queries the response was YES. [2024-06-21 16:59:26,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35908 conditions, 10012 events. 6875/10012 cut-off events. For 37845/37845 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 57012 event pairs, 3191 based on Foata normal form. 4/10013 useless extension candidates. Maximal degree in co-relation 35882. Up to 9406 conditions per place. [2024-06-21 16:59:26,659 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 77 selfloop transitions, 10 changer transitions 0/95 dead transitions. [2024-06-21 16:59:26,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 95 transitions, 699 flow [2024-06-21 16:59:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:59:26,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:59:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 16:59:26,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980392156862745 [2024-06-21 16:59:26,661 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 455 flow. Second operand 5 states and 127 transitions. [2024-06-21 16:59:26,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 95 transitions, 699 flow [2024-06-21 16:59:26,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 95 transitions, 651 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:59:26,681 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 476 flow [2024-06-21 16:59:26,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=476, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-21 16:59:26,682 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-06-21 16:59:26,682 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 476 flow [2024-06-21 16:59:26,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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 16:59:26,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:26,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:26,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:59:26,683 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:26,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:26,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1848568094, now seen corresponding path program 1 times [2024-06-21 16:59:26,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:26,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972060497] [2024-06-21 16:59:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:26,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:27,434 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 16:59:27,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:27,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972060497] [2024-06-21 16:59:27,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972060497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:27,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:27,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:59:27,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629335560] [2024-06-21 16:59:27,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:27,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:59:27,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:59:27,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:59:27,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 16:59:27,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 476 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 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 16:59:27,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:27,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 16:59:27,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:28,806 INFO L124 PetriNetUnfolderBase]: 8101/11387 cut-off events. [2024-06-21 16:59:28,806 INFO L125 PetriNetUnfolderBase]: For 59985/60077 co-relation queries the response was YES. [2024-06-21 16:59:28,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44489 conditions, 11387 events. 8101/11387 cut-off events. For 59985/60077 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 64063 event pairs, 2691 based on Foata normal form. 54/11411 useless extension candidates. Maximal degree in co-relation 44462. Up to 10308 conditions per place. [2024-06-21 16:59:28,868 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 88 selfloop transitions, 32 changer transitions 0/129 dead transitions. [2024-06-21 16:59:28,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 940 flow [2024-06-21 16:59:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 16:59:28,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434173669467787 [2024-06-21 16:59:28,871 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 476 flow. Second operand 7 states and 194 transitions. [2024-06-21 16:59:28,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 940 flow [2024-06-21 16:59:28,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 129 transitions, 901 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 16:59:28,893 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 566 flow [2024-06-21 16:59:28,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=566, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-21 16:59:28,895 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-06-21 16:59:28,895 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 566 flow [2024-06-21 16:59:28,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 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 16:59:28,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:28,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:28,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:59:28,896 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:28,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1848507644, now seen corresponding path program 2 times [2024-06-21 16:59:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:28,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097445237] [2024-06-21 16:59:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:29,597 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 16:59:29,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:29,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097445237] [2024-06-21 16:59:29,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097445237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:29,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:29,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:59:29,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726203182] [2024-06-21 16:59:29,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:29,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:59:29,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:29,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:59:29,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:59:29,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 16:59:29,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 566 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 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 16:59:29,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:29,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 16:59:29,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:30,954 INFO L124 PetriNetUnfolderBase]: 8134/11469 cut-off events. [2024-06-21 16:59:30,954 INFO L125 PetriNetUnfolderBase]: For 73067/73159 co-relation queries the response was YES. [2024-06-21 16:59:30,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46713 conditions, 11469 events. 8134/11469 cut-off events. For 73067/73159 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 65199 event pairs, 3552 based on Foata normal form. 87/11526 useless extension candidates. Maximal degree in co-relation 46685. Up to 10852 conditions per place. [2024-06-21 16:59:31,012 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 85 selfloop transitions, 31 changer transitions 0/125 dead transitions. [2024-06-21 16:59:31,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 934 flow [2024-06-21 16:59:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 16:59:31,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5322128851540616 [2024-06-21 16:59:31,015 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 566 flow. Second operand 7 states and 190 transitions. [2024-06-21 16:59:31,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 934 flow [2024-06-21 16:59:31,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 125 transitions, 887 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 16:59:31,048 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 634 flow [2024-06-21 16:59:31,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=634, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2024-06-21 16:59:31,048 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 29 predicate places. [2024-06-21 16:59:31,048 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 634 flow [2024-06-21 16:59:31,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 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 16:59:31,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:31,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:59:31,049 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:31,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash -917083243, now seen corresponding path program 1 times [2024-06-21 16:59:31,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:31,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431974818] [2024-06-21 16:59:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:31,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:31,807 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 16:59:31,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:31,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431974818] [2024-06-21 16:59:31,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431974818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:31,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:31,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:59:31,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426153409] [2024-06-21 16:59:31,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:31,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:59:31,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:59:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:59:31,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 16:59:31,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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 16:59:31,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:31,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 16:59:31,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:33,212 INFO L124 PetriNetUnfolderBase]: 8465/11899 cut-off events. [2024-06-21 16:59:33,213 INFO L125 PetriNetUnfolderBase]: For 83193/83193 co-relation queries the response was YES. [2024-06-21 16:59:33,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50015 conditions, 11899 events. 8465/11899 cut-off events. For 83193/83193 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65614 event pairs, 3709 based on Foata normal form. 4/11897 useless extension candidates. Maximal degree in co-relation 49985. Up to 11517 conditions per place. [2024-06-21 16:59:33,274 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 96 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-06-21 16:59:33,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 124 transitions, 1064 flow [2024-06-21 16:59:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:59:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:59:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 16:59:33,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-21 16:59:33,276 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 634 flow. Second operand 6 states and 156 transitions. [2024-06-21 16:59:33,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 124 transitions, 1064 flow [2024-06-21 16:59:33,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 124 transitions, 985 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 16:59:33,330 INFO L231 Difference]: Finished difference. Result has 84 places, 95 transitions, 694 flow [2024-06-21 16:59:33,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=694, PETRI_PLACES=84, PETRI_TRANSITIONS=95} [2024-06-21 16:59:33,330 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-21 16:59:33,330 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 95 transitions, 694 flow [2024-06-21 16:59:33,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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 16:59:33,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:33,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:33,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:59:33,331 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:33,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:33,332 INFO L85 PathProgramCache]: Analyzing trace with hash 518398810, now seen corresponding path program 1 times [2024-06-21 16:59:33,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:33,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148615272] [2024-06-21 16:59:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:33,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:34,217 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 16:59:34,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:34,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148615272] [2024-06-21 16:59:34,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148615272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:34,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:34,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:34,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126615794] [2024-06-21 16:59:34,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:34,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:34,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:34,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:34,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:34,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 16:59:34,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 95 transitions, 694 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:34,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:34,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 16:59:34,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:35,828 INFO L124 PetriNetUnfolderBase]: 8523/11974 cut-off events. [2024-06-21 16:59:35,829 INFO L125 PetriNetUnfolderBase]: For 99030/99030 co-relation queries the response was YES. [2024-06-21 16:59:35,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52650 conditions, 11974 events. 8523/11974 cut-off events. For 99030/99030 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 65935 event pairs, 3526 based on Foata normal form. 6/11966 useless extension candidates. Maximal degree in co-relation 52619. Up to 11416 conditions per place. [2024-06-21 16:59:35,909 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 100 selfloop transitions, 37 changer transitions 0/144 dead transitions. [2024-06-21 16:59:35,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 144 transitions, 1152 flow [2024-06-21 16:59:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:59:35,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049019607843137 [2024-06-21 16:59:35,912 INFO L175 Difference]: Start difference. First operand has 84 places, 95 transitions, 694 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:59:35,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 144 transitions, 1152 flow [2024-06-21 16:59:35,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 144 transitions, 1110 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 16:59:35,968 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 827 flow [2024-06-21 16:59:35,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=827, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-06-21 16:59:35,969 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-06-21 16:59:35,969 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 827 flow [2024-06-21 16:59:35,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:35,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:35,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:35,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:59:35,970 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:35,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:35,970 INFO L85 PathProgramCache]: Analyzing trace with hash 746299960, now seen corresponding path program 2 times [2024-06-21 16:59:35,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:35,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757692664] [2024-06-21 16:59:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:35,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:36,907 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 16:59:36,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:36,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757692664] [2024-06-21 16:59:36,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757692664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:36,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:36,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:36,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230677437] [2024-06-21 16:59:36,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:36,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:36,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:36,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:36,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:37,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 16:59:37,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 827 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:37,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:37,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 16:59:37,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:38,616 INFO L124 PetriNetUnfolderBase]: 8508/11948 cut-off events. [2024-06-21 16:59:38,616 INFO L125 PetriNetUnfolderBase]: For 113352/113352 co-relation queries the response was YES. [2024-06-21 16:59:38,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54803 conditions, 11948 events. 8508/11948 cut-off events. For 113352/113352 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 65775 event pairs, 3523 based on Foata normal form. 6/11940 useless extension candidates. Maximal degree in co-relation 54769. Up to 11395 conditions per place. [2024-06-21 16:59:38,715 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 102 selfloop transitions, 45 changer transitions 0/154 dead transitions. [2024-06-21 16:59:38,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 154 transitions, 1351 flow [2024-06-21 16:59:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:38,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:59:38,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049019607843137 [2024-06-21 16:59:38,718 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 827 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:59:38,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 154 transitions, 1351 flow [2024-06-21 16:59:38,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 1233 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:59:38,819 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 956 flow [2024-06-21 16:59:38,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=956, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2024-06-21 16:59:38,819 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 41 predicate places. [2024-06-21 16:59:38,820 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 956 flow [2024-06-21 16:59:38,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:38,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:38,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:38,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:59:38,820 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:38,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:38,821 INFO L85 PathProgramCache]: Analyzing trace with hash 754870840, now seen corresponding path program 3 times [2024-06-21 16:59:38,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:38,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403604047] [2024-06-21 16:59:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:38,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:39,712 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 16:59:39,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:39,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403604047] [2024-06-21 16:59:39,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403604047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:39,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:39,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:39,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530377905] [2024-06-21 16:59:39,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:39,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:39,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:39,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:39,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:39,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 16:59:39,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 956 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:39,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:39,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 16:59:39,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:41,207 INFO L124 PetriNetUnfolderBase]: 8585/12087 cut-off events. [2024-06-21 16:59:41,208 INFO L125 PetriNetUnfolderBase]: For 128582/128582 co-relation queries the response was YES. [2024-06-21 16:59:41,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57076 conditions, 12087 events. 8585/12087 cut-off events. For 128582/128582 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 66747 event pairs, 3155 based on Foata normal form. 6/12080 useless extension candidates. Maximal degree in co-relation 57040. Up to 11234 conditions per place. [2024-06-21 16:59:41,303 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 100 selfloop transitions, 56 changer transitions 0/163 dead transitions. [2024-06-21 16:59:41,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 163 transitions, 1450 flow [2024-06-21 16:59:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 16:59:41,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2024-06-21 16:59:41,305 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 956 flow. Second operand 8 states and 210 transitions. [2024-06-21 16:59:41,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 163 transitions, 1450 flow [2024-06-21 16:59:41,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 163 transitions, 1356 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 16:59:41,409 INFO L231 Difference]: Finished difference. Result has 101 places, 119 transitions, 1075 flow [2024-06-21 16:59:41,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1075, PETRI_PLACES=101, PETRI_TRANSITIONS=119} [2024-06-21 16:59:41,410 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2024-06-21 16:59:41,410 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 119 transitions, 1075 flow [2024-06-21 16:59:41,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:41,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:41,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:41,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:59:41,410 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:41,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:41,411 INFO L85 PathProgramCache]: Analyzing trace with hash -905655403, now seen corresponding path program 2 times [2024-06-21 16:59:41,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:41,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050251333] [2024-06-21 16:59:41,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:41,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:42,030 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 16:59:42,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:42,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050251333] [2024-06-21 16:59:42,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050251333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:42,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:42,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:59:42,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561167181] [2024-06-21 16:59:42,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:42,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:59:42,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:42,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:59:42,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:59:42,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 16:59:42,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 119 transitions, 1075 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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 16:59:42,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:42,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 16:59:42,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:43,402 INFO L124 PetriNetUnfolderBase]: 8571/12096 cut-off events. [2024-06-21 16:59:43,402 INFO L125 PetriNetUnfolderBase]: For 144755/144770 co-relation queries the response was YES. [2024-06-21 16:59:43,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58779 conditions, 12096 events. 8571/12096 cut-off events. For 144755/144770 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 67067 event pairs, 3493 based on Foata normal form. 14/12104 useless extension candidates. Maximal degree in co-relation 58741. Up to 11685 conditions per place. [2024-06-21 16:59:43,478 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 111 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2024-06-21 16:59:43,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 139 transitions, 1389 flow [2024-06-21 16:59:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:59:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:59:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 16:59:43,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-06-21 16:59:43,479 INFO L175 Difference]: Start difference. First operand has 101 places, 119 transitions, 1075 flow. Second operand 6 states and 147 transitions. [2024-06-21 16:59:43,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 139 transitions, 1389 flow [2024-06-21 16:59:43,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 139 transitions, 1238 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 16:59:43,597 INFO L231 Difference]: Finished difference. Result has 102 places, 119 transitions, 975 flow [2024-06-21 16:59:43,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=975, PETRI_PLACES=102, PETRI_TRANSITIONS=119} [2024-06-21 16:59:43,597 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-06-21 16:59:43,597 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 119 transitions, 975 flow [2024-06-21 16:59:43,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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 16:59:43,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:43,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:43,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:59:43,598 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:43,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:43,598 INFO L85 PathProgramCache]: Analyzing trace with hash -905856841, now seen corresponding path program 1 times [2024-06-21 16:59:43,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:43,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58903155] [2024-06-21 16:59:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:43,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:44,271 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 16:59:44,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:44,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58903155] [2024-06-21 16:59:44,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58903155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:44,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:44,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:59:44,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594366151] [2024-06-21 16:59:44,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:44,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:59:44,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:44,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:59:44,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:59:44,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 16:59:44,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 119 transitions, 975 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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 16:59:44,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:44,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 16:59:44,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:45,597 INFO L124 PetriNetUnfolderBase]: 7453/10806 cut-off events. [2024-06-21 16:59:45,598 INFO L125 PetriNetUnfolderBase]: For 132962/132962 co-relation queries the response was YES. [2024-06-21 16:59:45,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52179 conditions, 10806 events. 7453/10806 cut-off events. For 132962/132962 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 61645 event pairs, 2905 based on Foata normal form. 4/10802 useless extension candidates. Maximal degree in co-relation 52140. Up to 10202 conditions per place. [2024-06-21 16:59:45,678 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 124 selfloop transitions, 21 changer transitions 0/153 dead transitions. [2024-06-21 16:59:45,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 153 transitions, 1477 flow [2024-06-21 16:59:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:59:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:59:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 16:59:45,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163398692810458 [2024-06-21 16:59:45,680 INFO L175 Difference]: Start difference. First operand has 102 places, 119 transitions, 975 flow. Second operand 6 states and 158 transitions. [2024-06-21 16:59:45,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 153 transitions, 1477 flow [2024-06-21 16:59:45,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 153 transitions, 1418 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:59:45,768 INFO L231 Difference]: Finished difference. Result has 103 places, 127 transitions, 1059 flow [2024-06-21 16:59:45,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1059, PETRI_PLACES=103, PETRI_TRANSITIONS=127} [2024-06-21 16:59:45,769 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-21 16:59:45,769 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 127 transitions, 1059 flow [2024-06-21 16:59:45,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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 16:59:45,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:45,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:45,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:59:45,769 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:45,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:45,770 INFO L85 PathProgramCache]: Analyzing trace with hash 325016759, now seen corresponding path program 2 times [2024-06-21 16:59:45,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:45,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404430149] [2024-06-21 16:59:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:45,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:46,376 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 16:59:46,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:46,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404430149] [2024-06-21 16:59:46,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404430149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:46,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:46,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:59:46,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261642691] [2024-06-21 16:59:46,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:46,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:59:46,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:46,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:59:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:59:46,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 16:59:46,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 127 transitions, 1059 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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 16:59:46,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:46,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 16:59:46,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:47,690 INFO L124 PetriNetUnfolderBase]: 7439/10794 cut-off events. [2024-06-21 16:59:47,691 INFO L125 PetriNetUnfolderBase]: For 149528/149534 co-relation queries the response was YES. [2024-06-21 16:59:47,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54379 conditions, 10794 events. 7439/10794 cut-off events. For 149528/149534 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 61669 event pairs, 2888 based on Foata normal form. 8/10797 useless extension candidates. Maximal degree in co-relation 54339. Up to 10190 conditions per place. [2024-06-21 16:59:47,770 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 118 selfloop transitions, 21 changer transitions 0/147 dead transitions. [2024-06-21 16:59:47,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 147 transitions, 1387 flow [2024-06-21 16:59:47,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:59:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:59:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 16:59:47,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49673202614379086 [2024-06-21 16:59:47,772 INFO L175 Difference]: Start difference. First operand has 103 places, 127 transitions, 1059 flow. Second operand 6 states and 152 transitions. [2024-06-21 16:59:47,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 147 transitions, 1387 flow [2024-06-21 16:59:47,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 147 transitions, 1317 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 16:59:47,911 INFO L231 Difference]: Finished difference. Result has 107 places, 127 transitions, 1040 flow [2024-06-21 16:59:47,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1040, PETRI_PLACES=107, PETRI_TRANSITIONS=127} [2024-06-21 16:59:47,912 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 53 predicate places. [2024-06-21 16:59:47,912 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 127 transitions, 1040 flow [2024-06-21 16:59:47,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 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 16:59:47,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:47,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:47,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:59:47,913 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:47,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1113253575, now seen corresponding path program 1 times [2024-06-21 16:59:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:47,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932280290] [2024-06-21 16:59:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:47,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:48,626 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 16:59:48,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:48,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932280290] [2024-06-21 16:59:48,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932280290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:48,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:48,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:59:48,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653817975] [2024-06-21 16:59:48,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:48,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:59:48,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:48,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:59:48,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:59:48,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 16:59:48,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 127 transitions, 1040 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 16:59:48,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:48,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 16:59:48,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:50,314 INFO L124 PetriNetUnfolderBase]: 8699/12292 cut-off events. [2024-06-21 16:59:50,315 INFO L125 PetriNetUnfolderBase]: For 193396/193402 co-relation queries the response was YES. [2024-06-21 16:59:50,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63399 conditions, 12292 events. 8699/12292 cut-off events. For 193396/193402 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 68347 event pairs, 3389 based on Foata normal form. 12/12292 useless extension candidates. Maximal degree in co-relation 63357. Up to 11483 conditions per place. [2024-06-21 16:59:50,399 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 128 selfloop transitions, 52 changer transitions 0/187 dead transitions. [2024-06-21 16:59:50,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 187 transitions, 1838 flow [2024-06-21 16:59:50,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 16:59:50,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378151260504201 [2024-06-21 16:59:50,403 INFO L175 Difference]: Start difference. First operand has 107 places, 127 transitions, 1040 flow. Second operand 7 states and 192 transitions. [2024-06-21 16:59:50,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 187 transitions, 1838 flow [2024-06-21 16:59:50,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 187 transitions, 1783 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:59:50,547 INFO L231 Difference]: Finished difference. Result has 111 places, 145 transitions, 1350 flow [2024-06-21 16:59:50,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1350, PETRI_PLACES=111, PETRI_TRANSITIONS=145} [2024-06-21 16:59:50,547 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 57 predicate places. [2024-06-21 16:59:50,548 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 145 transitions, 1350 flow [2024-06-21 16:59:50,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 16:59:50,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:50,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:50,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:59:50,549 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:50,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:50,550 INFO L85 PathProgramCache]: Analyzing trace with hash 480190040, now seen corresponding path program 1 times [2024-06-21 16:59:50,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:50,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034160539] [2024-06-21 16:59:50,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:50,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:51,324 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 16:59:51,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:51,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034160539] [2024-06-21 16:59:51,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034160539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:51,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:51,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:51,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804059892] [2024-06-21 16:59:51,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:51,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:51,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:51,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 16:59:51,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 145 transitions, 1350 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 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 16:59:51,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:51,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 16:59:51,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:52,956 INFO L124 PetriNetUnfolderBase]: 8941/12666 cut-off events. [2024-06-21 16:59:52,957 INFO L125 PetriNetUnfolderBase]: For 225986/225989 co-relation queries the response was YES. [2024-06-21 16:59:53,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69322 conditions, 12666 events. 8941/12666 cut-off events. For 225986/225989 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 71186 event pairs, 3495 based on Foata normal form. 18/12667 useless extension candidates. Maximal degree in co-relation 69277. Up to 11555 conditions per place. [2024-06-21 16:59:53,065 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 142 selfloop transitions, 53 changer transitions 0/202 dead transitions. [2024-06-21 16:59:53,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 202 transitions, 1973 flow [2024-06-21 16:59:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 16:59:53,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171568627450981 [2024-06-21 16:59:53,067 INFO L175 Difference]: Start difference. First operand has 111 places, 145 transitions, 1350 flow. Second operand 8 states and 211 transitions. [2024-06-21 16:59:53,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 202 transitions, 1973 flow [2024-06-21 16:59:53,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 202 transitions, 1871 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-21 16:59:53,432 INFO L231 Difference]: Finished difference. Result has 118 places, 154 transitions, 1513 flow [2024-06-21 16:59:53,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1513, PETRI_PLACES=118, PETRI_TRANSITIONS=154} [2024-06-21 16:59:53,433 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-21 16:59:53,433 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 154 transitions, 1513 flow [2024-06-21 16:59:53,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 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 16:59:53,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:53,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:53,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:59:53,434 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:53,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:53,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1635191559, now seen corresponding path program 2 times [2024-06-21 16:59:53,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:53,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719691906] [2024-06-21 16:59:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:53,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:54,115 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 16:59:54,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:54,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719691906] [2024-06-21 16:59:54,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719691906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:54,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:54,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:59:54,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868013702] [2024-06-21 16:59:54,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:54,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:59:54,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:54,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:59:54,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:59:54,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 16:59:54,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 154 transitions, 1513 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 16:59:54,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:54,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 16:59:54,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:55,920 INFO L124 PetriNetUnfolderBase]: 9107/12916 cut-off events. [2024-06-21 16:59:55,921 INFO L125 PetriNetUnfolderBase]: For 242158/242164 co-relation queries the response was YES. [2024-06-21 16:59:55,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71640 conditions, 12916 events. 9107/12916 cut-off events. For 242158/242164 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 72636 event pairs, 3437 based on Foata normal form. 12/12917 useless extension candidates. Maximal degree in co-relation 71592. Up to 11973 conditions per place. [2024-06-21 16:59:56,043 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 135 selfloop transitions, 58 changer transitions 0/200 dead transitions. [2024-06-21 16:59:56,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 200 transitions, 2273 flow [2024-06-21 16:59:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:56,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 16:59:56,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210084033613446 [2024-06-21 16:59:56,045 INFO L175 Difference]: Start difference. First operand has 118 places, 154 transitions, 1513 flow. Second operand 7 states and 186 transitions. [2024-06-21 16:59:56,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 200 transitions, 2273 flow [2024-06-21 16:59:56,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 200 transitions, 2185 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 16:59:56,301 INFO L231 Difference]: Finished difference. Result has 123 places, 164 transitions, 1699 flow [2024-06-21 16:59:56,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1699, PETRI_PLACES=123, PETRI_TRANSITIONS=164} [2024-06-21 16:59:56,301 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-06-21 16:59:56,302 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 164 transitions, 1699 flow [2024-06-21 16:59:56,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 16:59:56,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:56,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:56,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:59:56,302 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:56,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash 631870854, now seen corresponding path program 2 times [2024-06-21 16:59:56,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:56,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598883081] [2024-06-21 16:59:56,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:56,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:56,975 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 16:59:56,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:56,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598883081] [2024-06-21 16:59:56,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598883081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:56,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:56,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330916268] [2024-06-21 16:59:56,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:56,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:56,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:57,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 16:59:57,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 164 transitions, 1699 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 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 16:59:57,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:57,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 16:59:57,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:58,733 INFO L124 PetriNetUnfolderBase]: 9068/12841 cut-off events. [2024-06-21 16:59:58,734 INFO L125 PetriNetUnfolderBase]: For 259135/259138 co-relation queries the response was YES. [2024-06-21 16:59:58,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71978 conditions, 12841 events. 9068/12841 cut-off events. For 259135/259138 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 71984 event pairs, 2539 based on Foata normal form. 18/12832 useless extension candidates. Maximal degree in co-relation 71928. Up to 11036 conditions per place. [2024-06-21 16:59:58,844 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 138 selfloop transitions, 61 changer transitions 0/206 dead transitions. [2024-06-21 16:59:58,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 206 transitions, 2217 flow [2024-06-21 16:59:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:58,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:58,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 16:59:58,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266106442577031 [2024-06-21 16:59:58,846 INFO L175 Difference]: Start difference. First operand has 123 places, 164 transitions, 1699 flow. Second operand 7 states and 188 transitions. [2024-06-21 16:59:58,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 206 transitions, 2217 flow [2024-06-21 16:59:59,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 206 transitions, 2095 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 16:59:59,178 INFO L231 Difference]: Finished difference. Result has 127 places, 164 transitions, 1712 flow [2024-06-21 16:59:59,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1712, PETRI_PLACES=127, PETRI_TRANSITIONS=164} [2024-06-21 16:59:59,178 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 73 predicate places. [2024-06-21 16:59:59,178 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 164 transitions, 1712 flow [2024-06-21 16:59:59,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 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 16:59:59,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:59,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:59,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:59:59,179 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:59:59,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:59,179 INFO L85 PathProgramCache]: Analyzing trace with hash 921099850, now seen corresponding path program 3 times [2024-06-21 16:59:59,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:59,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491541589] [2024-06-21 16:59:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:59,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:00,012 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 17:00:00,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:00,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491541589] [2024-06-21 17:00:00,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491541589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:00,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:00,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:00,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899290782] [2024-06-21 17:00:00,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:00,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:00,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:00,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:00,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:00,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 164 transitions, 1712 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 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 17:00:00,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:00,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:00,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:01,669 INFO L124 PetriNetUnfolderBase]: 9029/12798 cut-off events. [2024-06-21 17:00:01,669 INFO L125 PetriNetUnfolderBase]: For 274301/274304 co-relation queries the response was YES. [2024-06-21 17:00:01,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72125 conditions, 12798 events. 9029/12798 cut-off events. For 274301/274304 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 71833 event pairs, 2137 based on Foata normal form. 18/12790 useless extension candidates. Maximal degree in co-relation 72074. Up to 10797 conditions per place. [2024-06-21 17:00:01,771 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 132 selfloop transitions, 63 changer transitions 0/202 dead transitions. [2024-06-21 17:00:01,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 202 transitions, 2216 flow [2024-06-21 17:00:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 17:00:01,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-21 17:00:01,773 INFO L175 Difference]: Start difference. First operand has 127 places, 164 transitions, 1712 flow. Second operand 7 states and 181 transitions. [2024-06-21 17:00:01,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 202 transitions, 2216 flow [2024-06-21 17:00:01,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 202 transitions, 2054 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:00:01,962 INFO L231 Difference]: Finished difference. Result has 127 places, 165 transitions, 1695 flow [2024-06-21 17:00:01,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1695, PETRI_PLACES=127, PETRI_TRANSITIONS=165} [2024-06-21 17:00:01,962 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 73 predicate places. [2024-06-21 17:00:01,963 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 165 transitions, 1695 flow [2024-06-21 17:00:01,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 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 17:00:01,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:01,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:01,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:00:01,963 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:01,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:01,964 INFO L85 PathProgramCache]: Analyzing trace with hash 266353725, now seen corresponding path program 3 times [2024-06-21 17:00:01,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:01,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107487694] [2024-06-21 17:00:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:01,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:02,664 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 17:00:02,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:02,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107487694] [2024-06-21 17:00:02,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107487694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:02,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:02,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:02,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088590096] [2024-06-21 17:00:02,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:02,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:02,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:02,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:02,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:02,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:02,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 165 transitions, 1695 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:02,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:02,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:02,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:04,292 INFO L124 PetriNetUnfolderBase]: 9011/12761 cut-off events. [2024-06-21 17:00:04,293 INFO L125 PetriNetUnfolderBase]: For 273414/273435 co-relation queries the response was YES. [2024-06-21 17:00:04,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72310 conditions, 12761 events. 9011/12761 cut-off events. For 273414/273435 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 71382 event pairs, 3423 based on Foata normal form. 22/12765 useless extension candidates. Maximal degree in co-relation 72258. Up to 11851 conditions per place. [2024-06-21 17:00:04,425 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 129 selfloop transitions, 58 changer transitions 0/194 dead transitions. [2024-06-21 17:00:04,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 194 transitions, 2315 flow [2024-06-21 17:00:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:04,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:04,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 17:00:04,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014005602240896 [2024-06-21 17:00:04,438 INFO L175 Difference]: Start difference. First operand has 127 places, 165 transitions, 1695 flow. Second operand 7 states and 179 transitions. [2024-06-21 17:00:04,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 194 transitions, 2315 flow [2024-06-21 17:00:04,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 194 transitions, 2140 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 17:00:04,709 INFO L231 Difference]: Finished difference. Result has 129 places, 165 transitions, 1647 flow [2024-06-21 17:00:04,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1647, PETRI_PLACES=129, PETRI_TRANSITIONS=165} [2024-06-21 17:00:04,709 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-21 17:00:04,710 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 165 transitions, 1647 flow [2024-06-21 17:00:04,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:04,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:04,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:04,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:00:04,710 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:04,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:04,711 INFO L85 PathProgramCache]: Analyzing trace with hash 375154463, now seen corresponding path program 1 times [2024-06-21 17:00:04,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:04,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831806254] [2024-06-21 17:00:04,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:04,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:05,439 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 17:00:05,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:05,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831806254] [2024-06-21 17:00:05,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831806254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:05,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:05,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:05,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618684439] [2024-06-21 17:00:05,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:05,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:05,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:05,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:05,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:05,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:00:05,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 165 transitions, 1647 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 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 17:00:05,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:05,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:00:05,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:06,945 INFO L124 PetriNetUnfolderBase]: 7893/11488 cut-off events. [2024-06-21 17:00:06,946 INFO L125 PetriNetUnfolderBase]: For 242017/242017 co-relation queries the response was YES. [2024-06-21 17:00:07,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64273 conditions, 11488 events. 7893/11488 cut-off events. For 242017/242017 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 66621 event pairs, 2912 based on Foata normal form. 4/11487 useless extension candidates. Maximal degree in co-relation 64220. Up to 10846 conditions per place. [2024-06-21 17:00:07,075 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 172 selfloop transitions, 18 changer transitions 0/198 dead transitions. [2024-06-21 17:00:07,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 198 transitions, 2153 flow [2024-06-21 17:00:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 17:00:07,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49299719887955185 [2024-06-21 17:00:07,077 INFO L175 Difference]: Start difference. First operand has 129 places, 165 transitions, 1647 flow. Second operand 7 states and 176 transitions. [2024-06-21 17:00:07,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 198 transitions, 2153 flow [2024-06-21 17:00:07,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 198 transitions, 1994 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:00:07,351 INFO L231 Difference]: Finished difference. Result has 130 places, 169 transitions, 1593 flow [2024-06-21 17:00:07,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1593, PETRI_PLACES=130, PETRI_TRANSITIONS=169} [2024-06-21 17:00:07,352 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-21 17:00:07,352 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 169 transitions, 1593 flow [2024-06-21 17:00:07,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 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 17:00:07,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:07,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:07,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:00:07,353 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:07,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:07,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1812507777, now seen corresponding path program 2 times [2024-06-21 17:00:07,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:07,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290445941] [2024-06-21 17:00:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:07,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:08,075 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 17:00:08,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:08,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290445941] [2024-06-21 17:00:08,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290445941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:08,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:08,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:08,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396298867] [2024-06-21 17:00:08,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:08,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:08,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:08,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:08,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:08,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:00:08,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 169 transitions, 1593 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 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 17:00:08,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:08,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:00:08,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:09,743 INFO L124 PetriNetUnfolderBase]: 7925/11554 cut-off events. [2024-06-21 17:00:09,743 INFO L125 PetriNetUnfolderBase]: For 260813/260813 co-relation queries the response was YES. [2024-06-21 17:00:09,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65928 conditions, 11554 events. 7925/11554 cut-off events. For 260813/260813 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 67037 event pairs, 2860 based on Foata normal form. 4/11548 useless extension candidates. Maximal degree in co-relation 65876. Up to 10777 conditions per place. [2024-06-21 17:00:09,829 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 165 selfloop transitions, 35 changer transitions 0/208 dead transitions. [2024-06-21 17:00:09,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 208 transitions, 2285 flow [2024-06-21 17:00:09,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 17:00:09,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-21 17:00:09,832 INFO L175 Difference]: Start difference. First operand has 130 places, 169 transitions, 1593 flow. Second operand 7 states and 182 transitions. [2024-06-21 17:00:09,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 208 transitions, 2285 flow [2024-06-21 17:00:10,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 208 transitions, 2210 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:00:10,006 INFO L231 Difference]: Finished difference. Result has 132 places, 177 transitions, 1725 flow [2024-06-21 17:00:10,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1725, PETRI_PLACES=132, PETRI_TRANSITIONS=177} [2024-06-21 17:00:10,006 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 78 predicate places. [2024-06-21 17:00:10,006 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 177 transitions, 1725 flow [2024-06-21 17:00:10,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 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 17:00:10,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:10,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:10,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:00:10,007 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:10,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:10,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1485586143, now seen corresponding path program 3 times [2024-06-21 17:00:10,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:10,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681589313] [2024-06-21 17:00:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:10,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:10,682 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 17:00:10,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:10,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681589313] [2024-06-21 17:00:10,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681589313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:10,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:10,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:10,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721181292] [2024-06-21 17:00:10,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:10,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:10,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:10,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:10,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:00:10,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 177 transitions, 1725 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 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 17:00:10,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:10,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:00:10,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:12,275 INFO L124 PetriNetUnfolderBase]: 7911/11538 cut-off events. [2024-06-21 17:00:12,275 INFO L125 PetriNetUnfolderBase]: For 283495/283498 co-relation queries the response was YES. [2024-06-21 17:00:12,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68035 conditions, 11538 events. 7911/11538 cut-off events. For 283495/283498 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 66864 event pairs, 2830 based on Foata normal form. 4/11535 useless extension candidates. Maximal degree in co-relation 67982. Up to 10765 conditions per place. [2024-06-21 17:00:12,368 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 159 selfloop transitions, 35 changer transitions 0/202 dead transitions. [2024-06-21 17:00:12,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 2175 flow [2024-06-21 17:00:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 17:00:12,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49299719887955185 [2024-06-21 17:00:12,369 INFO L175 Difference]: Start difference. First operand has 132 places, 177 transitions, 1725 flow. Second operand 7 states and 176 transitions. [2024-06-21 17:00:12,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 2175 flow [2024-06-21 17:00:12,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 202 transitions, 2067 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 17:00:12,629 INFO L231 Difference]: Finished difference. Result has 136 places, 177 transitions, 1696 flow [2024-06-21 17:00:12,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1696, PETRI_PLACES=136, PETRI_TRANSITIONS=177} [2024-06-21 17:00:12,630 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-21 17:00:12,630 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 177 transitions, 1696 flow [2024-06-21 17:00:12,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 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 17:00:12,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:12,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:12,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:00:12,631 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:12,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:12,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1989885561, now seen corresponding path program 1 times [2024-06-21 17:00:12,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:12,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244370018] [2024-06-21 17:00:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:12,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:13,710 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 17:00:13,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:13,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244370018] [2024-06-21 17:00:13,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244370018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:13,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:13,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:13,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082636985] [2024-06-21 17:00:13,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:13,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:13,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:13,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:00:13,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 177 transitions, 1696 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 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 17:00:13,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:13,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:00:13,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:15,203 INFO L124 PetriNetUnfolderBase]: 7899/11526 cut-off events. [2024-06-21 17:00:15,203 INFO L125 PetriNetUnfolderBase]: For 299010/299010 co-relation queries the response was YES. [2024-06-21 17:00:15,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68096 conditions, 11526 events. 7899/11526 cut-off events. For 299010/299010 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 66977 event pairs, 2850 based on Foata normal form. 4/11527 useless extension candidates. Maximal degree in co-relation 68041. Up to 10866 conditions per place. [2024-06-21 17:00:15,304 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 182 selfloop transitions, 17 changer transitions 0/207 dead transitions. [2024-06-21 17:00:15,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 207 transitions, 2248 flow [2024-06-21 17:00:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 17:00:15,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-21 17:00:15,306 INFO L175 Difference]: Start difference. First operand has 136 places, 177 transitions, 1696 flow. Second operand 7 states and 169 transitions. [2024-06-21 17:00:15,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 207 transitions, 2248 flow [2024-06-21 17:00:15,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 207 transitions, 2131 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 17:00:15,603 INFO L231 Difference]: Finished difference. Result has 137 places, 184 transitions, 1730 flow [2024-06-21 17:00:15,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1730, PETRI_PLACES=137, PETRI_TRANSITIONS=184} [2024-06-21 17:00:15,604 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 83 predicate places. [2024-06-21 17:00:15,604 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 184 transitions, 1730 flow [2024-06-21 17:00:15,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 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 17:00:15,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:15,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:15,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:00:15,605 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:15,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1146475545, now seen corresponding path program 1 times [2024-06-21 17:00:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:15,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128628738] [2024-06-21 17:00:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:15,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:16,205 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 17:00:16,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:16,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128628738] [2024-06-21 17:00:16,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128628738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:16,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:16,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:00:16,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035249873] [2024-06-21 17:00:16,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:16,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:00:16,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:16,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:00:16,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:00:16,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-21 17:00:16,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 184 transitions, 1730 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 17:00:16,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:16,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-21 17:00:16,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:17,588 INFO L124 PetriNetUnfolderBase]: 7485/11166 cut-off events. [2024-06-21 17:00:17,588 INFO L125 PetriNetUnfolderBase]: For 310327/310463 co-relation queries the response was YES. [2024-06-21 17:00:17,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68315 conditions, 11166 events. 7485/11166 cut-off events. For 310327/310463 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 67266 event pairs, 2674 based on Foata normal form. 1/11048 useless extension candidates. Maximal degree in co-relation 68259. Up to 10224 conditions per place. [2024-06-21 17:00:17,689 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 169 selfloop transitions, 10 changer transitions 0/199 dead transitions. [2024-06-21 17:00:17,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2170 flow [2024-06-21 17:00:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:00:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:00:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 17:00:17,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 17:00:17,690 INFO L175 Difference]: Start difference. First operand has 137 places, 184 transitions, 1730 flow. Second operand 5 states and 125 transitions. [2024-06-21 17:00:17,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2170 flow [2024-06-21 17:00:17,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 199 transitions, 2088 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 17:00:17,935 INFO L231 Difference]: Finished difference. Result has 138 places, 188 transitions, 1737 flow [2024-06-21 17:00:17,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1737, PETRI_PLACES=138, PETRI_TRANSITIONS=188} [2024-06-21 17:00:17,937 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2024-06-21 17:00:17,937 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 188 transitions, 1737 flow [2024-06-21 17:00:17,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 17:00:17,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:17,938 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 17:00:17,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:00:17,938 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:17,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:17,938 INFO L85 PathProgramCache]: Analyzing trace with hash -854378124, now seen corresponding path program 1 times [2024-06-21 17:00:17,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:17,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996070975] [2024-06-21 17:00:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:17,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:18,786 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 17:00:18,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:18,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996070975] [2024-06-21 17:00:18,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996070975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:18,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:18,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:18,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136539644] [2024-06-21 17:00:18,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:18,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:18,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:18,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:18,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:18,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:18,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 188 transitions, 1737 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:18,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:18,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:18,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:20,624 INFO L124 PetriNetUnfolderBase]: 9197/13025 cut-off events. [2024-06-21 17:00:20,625 INFO L125 PetriNetUnfolderBase]: For 404635/404644 co-relation queries the response was YES. [2024-06-21 17:00:20,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83203 conditions, 13025 events. 9197/13025 cut-off events. For 404635/404644 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 72918 event pairs, 3364 based on Foata normal form. 12/13029 useless extension candidates. Maximal degree in co-relation 83146. Up to 11993 conditions per place. [2024-06-21 17:00:20,797 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 158 selfloop transitions, 75 changer transitions 0/240 dead transitions. [2024-06-21 17:00:20,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 240 transitions, 2707 flow [2024-06-21 17:00:20,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:20,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 17:00:20,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266106442577031 [2024-06-21 17:00:20,799 INFO L175 Difference]: Start difference. First operand has 138 places, 188 transitions, 1737 flow. Second operand 7 states and 188 transitions. [2024-06-21 17:00:20,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 240 transitions, 2707 flow [2024-06-21 17:00:21,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 240 transitions, 2646 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 17:00:21,197 INFO L231 Difference]: Finished difference. Result has 143 places, 201 transitions, 2042 flow [2024-06-21 17:00:21,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2042, PETRI_PLACES=143, PETRI_TRANSITIONS=201} [2024-06-21 17:00:21,198 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 89 predicate places. [2024-06-21 17:00:21,198 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 201 transitions, 2042 flow [2024-06-21 17:00:21,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:21,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:21,199 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 17:00:21,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:00:21,199 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:21,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:21,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1893276150, now seen corresponding path program 2 times [2024-06-21 17:00:21,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:21,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725659495] [2024-06-21 17:00:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:21,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:21,978 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 17:00:21,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:21,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725659495] [2024-06-21 17:00:21,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725659495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:21,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:21,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:21,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364490093] [2024-06-21 17:00:21,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:21,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:21,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:21,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:22,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:22,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 201 transitions, 2042 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:22,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:22,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:22,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:23,737 INFO L124 PetriNetUnfolderBase]: 9169/12985 cut-off events. [2024-06-21 17:00:23,737 INFO L125 PetriNetUnfolderBase]: For 423984/423993 co-relation queries the response was YES. [2024-06-21 17:00:23,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84443 conditions, 12985 events. 9169/12985 cut-off events. For 423984/423993 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 72693 event pairs, 3339 based on Foata normal form. 12/12989 useless extension candidates. Maximal degree in co-relation 84384. Up to 11973 conditions per place. [2024-06-21 17:00:23,859 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 159 selfloop transitions, 71 changer transitions 0/237 dead transitions. [2024-06-21 17:00:23,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 2826 flow [2024-06-21 17:00:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 17:00:23,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182072829131653 [2024-06-21 17:00:23,861 INFO L175 Difference]: Start difference. First operand has 143 places, 201 transitions, 2042 flow. Second operand 7 states and 185 transitions. [2024-06-21 17:00:23,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 2826 flow [2024-06-21 17:00:24,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 237 transitions, 2705 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 17:00:24,267 INFO L231 Difference]: Finished difference. Result has 147 places, 201 transitions, 2075 flow [2024-06-21 17:00:24,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2075, PETRI_PLACES=147, PETRI_TRANSITIONS=201} [2024-06-21 17:00:24,267 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 93 predicate places. [2024-06-21 17:00:24,267 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 201 transitions, 2075 flow [2024-06-21 17:00:24,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:24,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:24,268 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 17:00:24,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:00:24,268 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:24,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash -60445024, now seen corresponding path program 3 times [2024-06-21 17:00:24,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:24,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487767810] [2024-06-21 17:00:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:24,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:24,947 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 17:00:24,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:24,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487767810] [2024-06-21 17:00:24,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487767810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:24,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:24,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:24,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783015227] [2024-06-21 17:00:24,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:24,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:24,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:24,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:24,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:25,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:25,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 201 transitions, 2075 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:25,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:25,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:25,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:26,865 INFO L124 PetriNetUnfolderBase]: 9145/12931 cut-off events. [2024-06-21 17:00:26,865 INFO L125 PetriNetUnfolderBase]: For 446130/446139 co-relation queries the response was YES. [2024-06-21 17:00:26,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84870 conditions, 12931 events. 9145/12931 cut-off events. For 446130/446139 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 72156 event pairs, 3375 based on Foata normal form. 8/12920 useless extension candidates. Maximal degree in co-relation 84810. Up to 11953 conditions per place. [2024-06-21 17:00:26,984 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 152 selfloop transitions, 78 changer transitions 0/237 dead transitions. [2024-06-21 17:00:26,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 237 transitions, 2867 flow [2024-06-21 17:00:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 17:00:26,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182072829131653 [2024-06-21 17:00:26,985 INFO L175 Difference]: Start difference. First operand has 147 places, 201 transitions, 2075 flow. Second operand 7 states and 185 transitions. [2024-06-21 17:00:26,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 237 transitions, 2867 flow [2024-06-21 17:00:27,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 237 transitions, 2710 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 17:00:27,345 INFO L231 Difference]: Finished difference. Result has 150 places, 201 transitions, 2083 flow [2024-06-21 17:00:27,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2083, PETRI_PLACES=150, PETRI_TRANSITIONS=201} [2024-06-21 17:00:27,345 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2024-06-21 17:00:27,345 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 201 transitions, 2083 flow [2024-06-21 17:00:27,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:27,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:27,346 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 17:00:27,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:00:27,346 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:27,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:27,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2103856050, now seen corresponding path program 4 times [2024-06-21 17:00:27,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:27,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325896723] [2024-06-21 17:00:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:27,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:28,095 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 17:00:28,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:28,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325896723] [2024-06-21 17:00:28,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325896723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:28,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:28,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:28,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981010266] [2024-06-21 17:00:28,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:28,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:28,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:28,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:28,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:28,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:28,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 201 transitions, 2083 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:28,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:28,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:28,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:30,246 INFO L124 PetriNetUnfolderBase]: 9177/12978 cut-off events. [2024-06-21 17:00:30,246 INFO L125 PetriNetUnfolderBase]: For 470429/470438 co-relation queries the response was YES. [2024-06-21 17:00:30,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85961 conditions, 12978 events. 9177/12978 cut-off events. For 470429/470438 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 72544 event pairs, 3382 based on Foata normal form. 8/12967 useless extension candidates. Maximal degree in co-relation 85900. Up to 11972 conditions per place. [2024-06-21 17:00:30,352 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 147 selfloop transitions, 82 changer transitions 0/236 dead transitions. [2024-06-21 17:00:30,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 236 transitions, 2820 flow [2024-06-21 17:00:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 17:00:30,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-21 17:00:30,353 INFO L175 Difference]: Start difference. First operand has 150 places, 201 transitions, 2083 flow. Second operand 7 states and 181 transitions. [2024-06-21 17:00:30,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 236 transitions, 2820 flow [2024-06-21 17:00:30,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 236 transitions, 2479 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 17:00:30,812 INFO L231 Difference]: Finished difference. Result has 148 places, 205 transitions, 1988 flow [2024-06-21 17:00:30,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1988, PETRI_PLACES=148, PETRI_TRANSITIONS=205} [2024-06-21 17:00:30,812 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2024-06-21 17:00:30,812 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 205 transitions, 1988 flow [2024-06-21 17:00:30,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:30,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:30,813 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 17:00:30,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:00:30,813 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:30,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1191476522, now seen corresponding path program 5 times [2024-06-21 17:00:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:30,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691447103] [2024-06-21 17:00:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:30,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:31,525 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 17:00:31,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:31,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691447103] [2024-06-21 17:00:31,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691447103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:31,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:31,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:31,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857451664] [2024-06-21 17:00:31,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:31,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:31,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:31,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:31,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:31,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:31,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 205 transitions, 1988 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:31,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:31,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:31,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:33,300 INFO L124 PetriNetUnfolderBase]: 9163/12968 cut-off events. [2024-06-21 17:00:33,300 INFO L125 PetriNetUnfolderBase]: For 489257/489272 co-relation queries the response was YES. [2024-06-21 17:00:33,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86050 conditions, 12968 events. 9163/12968 cut-off events. For 489257/489272 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 72570 event pairs, 3348 based on Foata normal form. 14/12964 useless extension candidates. Maximal degree in co-relation 85989. Up to 11964 conditions per place. [2024-06-21 17:00:33,417 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 148 selfloop transitions, 77 changer transitions 0/232 dead transitions. [2024-06-21 17:00:33,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 232 transitions, 2636 flow [2024-06-21 17:00:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 17:00:33,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49299719887955185 [2024-06-21 17:00:33,418 INFO L175 Difference]: Start difference. First operand has 148 places, 205 transitions, 1988 flow. Second operand 7 states and 176 transitions. [2024-06-21 17:00:33,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 232 transitions, 2636 flow [2024-06-21 17:00:33,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 232 transitions, 2468 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 17:00:33,836 INFO L231 Difference]: Finished difference. Result has 151 places, 205 transitions, 1983 flow [2024-06-21 17:00:33,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1983, PETRI_PLACES=151, PETRI_TRANSITIONS=205} [2024-06-21 17:00:33,837 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 97 predicate places. [2024-06-21 17:00:33,837 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 205 transitions, 1983 flow [2024-06-21 17:00:33,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:33,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:33,837 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 17:00:33,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:00:33,838 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:33,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:33,838 INFO L85 PathProgramCache]: Analyzing trace with hash -332964098, now seen corresponding path program 6 times [2024-06-21 17:00:33,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:33,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933075506] [2024-06-21 17:00:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:33,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:34,520 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 17:00:34,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:34,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933075506] [2024-06-21 17:00:34,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933075506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:34,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:34,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:34,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693222376] [2024-06-21 17:00:34,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:34,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:34,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:34,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:34,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:34,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 205 transitions, 1983 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:34,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:34,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:34,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:36,299 INFO L124 PetriNetUnfolderBase]: 9125/12914 cut-off events. [2024-06-21 17:00:36,299 INFO L125 PetriNetUnfolderBase]: For 512272/512287 co-relation queries the response was YES. [2024-06-21 17:00:36,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86223 conditions, 12914 events. 9125/12914 cut-off events. For 512272/512287 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 72222 event pairs, 3346 based on Foata normal form. 18/12914 useless extension candidates. Maximal degree in co-relation 86161. Up to 11932 conditions per place. [2024-06-21 17:00:36,432 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 150 selfloop transitions, 73 changer transitions 0/230 dead transitions. [2024-06-21 17:00:36,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 230 transitions, 2497 flow [2024-06-21 17:00:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 17:00:36,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 17:00:36,433 INFO L175 Difference]: Start difference. First operand has 151 places, 205 transitions, 1983 flow. Second operand 7 states and 175 transitions. [2024-06-21 17:00:36,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 230 transitions, 2497 flow [2024-06-21 17:00:36,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 230 transitions, 2306 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:00:36,892 INFO L231 Difference]: Finished difference. Result has 153 places, 205 transitions, 1949 flow [2024-06-21 17:00:36,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1949, PETRI_PLACES=153, PETRI_TRANSITIONS=205} [2024-06-21 17:00:36,893 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2024-06-21 17:00:36,893 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 205 transitions, 1949 flow [2024-06-21 17:00:36,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 17:00:36,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:36,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:36,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:00:36,893 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:36,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:36,894 INFO L85 PathProgramCache]: Analyzing trace with hash -951306784, now seen corresponding path program 1 times [2024-06-21 17:00:36,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:36,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754345179] [2024-06-21 17:00:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:36,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:37,644 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 17:00:37,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:37,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754345179] [2024-06-21 17:00:37,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754345179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:37,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:37,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:37,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137125358] [2024-06-21 17:00:37,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:37,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:37,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:37,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:37,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:37,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:37,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 205 transitions, 1949 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:00:37,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:37,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:37,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:39,858 INFO L124 PetriNetUnfolderBase]: 10531/14974 cut-off events. [2024-06-21 17:00:39,859 INFO L125 PetriNetUnfolderBase]: For 591819/591840 co-relation queries the response was YES. [2024-06-21 17:00:39,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99074 conditions, 14974 events. 10531/14974 cut-off events. For 591819/591840 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 85697 event pairs, 3400 based on Foata normal form. 48/15014 useless extension candidates. Maximal degree in co-relation 99011. Up to 12710 conditions per place. [2024-06-21 17:00:40,005 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 204 selfloop transitions, 154 changer transitions 0/365 dead transitions. [2024-06-21 17:00:40,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 365 transitions, 4085 flow [2024-06-21 17:00:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:00:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:00:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-21 17:00:40,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381263616557734 [2024-06-21 17:00:40,007 INFO L175 Difference]: Start difference. First operand has 153 places, 205 transitions, 1949 flow. Second operand 9 states and 247 transitions. [2024-06-21 17:00:40,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 365 transitions, 4085 flow [2024-06-21 17:00:40,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 365 transitions, 3736 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:00:40,759 INFO L231 Difference]: Finished difference. Result has 159 places, 293 transitions, 3088 flow [2024-06-21 17:00:40,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3088, PETRI_PLACES=159, PETRI_TRANSITIONS=293} [2024-06-21 17:00:40,760 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2024-06-21 17:00:40,760 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 293 transitions, 3088 flow [2024-06-21 17:00:40,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:00:40,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:40,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:40,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:00:40,761 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:40,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash -834366684, now seen corresponding path program 2 times [2024-06-21 17:00:40,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:40,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818553608] [2024-06-21 17:00:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:40,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:41,576 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 17:00:41,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:41,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818553608] [2024-06-21 17:00:41,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818553608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:41,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:41,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:41,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656491540] [2024-06-21 17:00:41,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:41,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:41,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:41,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:41,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:41,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:41,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 293 transitions, 3088 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:00:41,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:41,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:41,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:44,145 INFO L124 PetriNetUnfolderBase]: 11011/15681 cut-off events. [2024-06-21 17:00:44,145 INFO L125 PetriNetUnfolderBase]: For 664813/664838 co-relation queries the response was YES. [2024-06-21 17:00:44,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108953 conditions, 15681 events. 11011/15681 cut-off events. For 664813/664838 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 90297 event pairs, 2941 based on Foata normal form. 52/15725 useless extension candidates. Maximal degree in co-relation 108885. Up to 12653 conditions per place. [2024-06-21 17:00:44,290 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 175 selfloop transitions, 175 changer transitions 0/357 dead transitions. [2024-06-21 17:00:44,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 357 transitions, 4286 flow [2024-06-21 17:00:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-21 17:00:44,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367647058823529 [2024-06-21 17:00:44,291 INFO L175 Difference]: Start difference. First operand has 159 places, 293 transitions, 3088 flow. Second operand 8 states and 219 transitions. [2024-06-21 17:00:44,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 357 transitions, 4286 flow [2024-06-21 17:00:45,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 357 transitions, 4227 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 17:00:45,199 INFO L231 Difference]: Finished difference. Result has 166 places, 301 transitions, 3588 flow [2024-06-21 17:00:45,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3588, PETRI_PLACES=166, PETRI_TRANSITIONS=301} [2024-06-21 17:00:45,200 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 112 predicate places. [2024-06-21 17:00:45,200 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 301 transitions, 3588 flow [2024-06-21 17:00:45,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:00:45,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:45,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:45,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:00:45,201 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:45,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:45,201 INFO L85 PathProgramCache]: Analyzing trace with hash -825795804, now seen corresponding path program 3 times [2024-06-21 17:00:45,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:45,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115098266] [2024-06-21 17:00:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:45,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:46,394 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 17:00:46,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:46,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115098266] [2024-06-21 17:00:46,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115098266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:46,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:46,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:46,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939073154] [2024-06-21 17:00:46,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:46,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:46,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:46,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:46,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:46,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:46,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 301 transitions, 3588 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:00:46,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:46,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:46,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:49,464 INFO L124 PetriNetUnfolderBase]: 11511/16385 cut-off events. [2024-06-21 17:00:49,464 INFO L125 PetriNetUnfolderBase]: For 757262/757287 co-relation queries the response was YES. [2024-06-21 17:00:49,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118424 conditions, 16385 events. 11511/16385 cut-off events. For 757262/757287 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 94953 event pairs, 3618 based on Foata normal form. 100/16477 useless extension candidates. Maximal degree in co-relation 118353. Up to 14200 conditions per place. [2024-06-21 17:00:49,670 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 185 selfloop transitions, 164 changer transitions 0/356 dead transitions. [2024-06-21 17:00:49,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 356 transitions, 4617 flow [2024-06-21 17:00:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 17:00:49,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196078431372549 [2024-06-21 17:00:49,672 INFO L175 Difference]: Start difference. First operand has 166 places, 301 transitions, 3588 flow. Second operand 8 states and 212 transitions. [2024-06-21 17:00:49,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 356 transitions, 4617 flow [2024-06-21 17:00:50,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 356 transitions, 4365 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:00:50,626 INFO L231 Difference]: Finished difference. Result has 169 places, 307 transitions, 3843 flow [2024-06-21 17:00:50,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3843, PETRI_PLACES=169, PETRI_TRANSITIONS=307} [2024-06-21 17:00:50,627 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 115 predicate places. [2024-06-21 17:00:50,627 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 307 transitions, 3843 flow [2024-06-21 17:00:50,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:00:50,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:50,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:50,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:00:50,627 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:50,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:50,628 INFO L85 PathProgramCache]: Analyzing trace with hash 526299578, now seen corresponding path program 4 times [2024-06-21 17:00:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:50,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598866558] [2024-06-21 17:00:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:50,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:51,447 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 17:00:51,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:51,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598866558] [2024-06-21 17:00:51,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598866558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:51,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:51,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:51,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805763041] [2024-06-21 17:00:51,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:51,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:51,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:51,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:51,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 307 transitions, 3843 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:00:51,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:51,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:51,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:54,613 INFO L124 PetriNetUnfolderBase]: 11873/16879 cut-off events. [2024-06-21 17:00:54,614 INFO L125 PetriNetUnfolderBase]: For 754884/754895 co-relation queries the response was YES. [2024-06-21 17:00:54,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121969 conditions, 16879 events. 11873/16879 cut-off events. For 754884/754895 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 98110 event pairs, 3654 based on Foata normal form. 84/16955 useless extension candidates. Maximal degree in co-relation 121897. Up to 14714 conditions per place. [2024-06-21 17:00:54,773 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 201 selfloop transitions, 147 changer transitions 0/355 dead transitions. [2024-06-21 17:00:54,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 355 transitions, 4852 flow [2024-06-21 17:00:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 17:00:54,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049019607843137 [2024-06-21 17:00:54,775 INFO L175 Difference]: Start difference. First operand has 169 places, 307 transitions, 3843 flow. Second operand 8 states and 206 transitions. [2024-06-21 17:00:54,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 355 transitions, 4852 flow [2024-06-21 17:00:55,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 355 transitions, 4480 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:00:55,686 INFO L231 Difference]: Finished difference. Result has 171 places, 313 transitions, 3954 flow [2024-06-21 17:00:55,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3954, PETRI_PLACES=171, PETRI_TRANSITIONS=313} [2024-06-21 17:00:55,687 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 117 predicate places. [2024-06-21 17:00:55,687 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 313 transitions, 3954 flow [2024-06-21 17:00:55,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:00:55,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:55,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:55,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:00:55,688 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:00:55,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:55,688 INFO L85 PathProgramCache]: Analyzing trace with hash -545219082, now seen corresponding path program 1 times [2024-06-21 17:00:55,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:55,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388275920] [2024-06-21 17:00:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:55,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:56,609 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 17:00:56,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:56,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388275920] [2024-06-21 17:00:56,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388275920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:56,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:56,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:56,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897496477] [2024-06-21 17:00:56,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:56,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:56,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:56,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:56,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:56,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:00:56,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 313 transitions, 3954 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:00:56,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:56,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:00:56,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:59,609 INFO L124 PetriNetUnfolderBase]: 11937/16960 cut-off events. [2024-06-21 17:00:59,609 INFO L125 PetriNetUnfolderBase]: For 737254/737259 co-relation queries the response was YES. [2024-06-21 17:00:59,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122700 conditions, 16960 events. 11937/16960 cut-off events. For 737254/737259 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 98710 event pairs, 3894 based on Foata normal form. 8/16961 useless extension candidates. Maximal degree in co-relation 122627. Up to 15974 conditions per place. [2024-06-21 17:00:59,773 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 291 selfloop transitions, 61 changer transitions 0/359 dead transitions. [2024-06-21 17:00:59,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 359 transitions, 4876 flow [2024-06-21 17:00:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 17:00:59,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024509803921569 [2024-06-21 17:00:59,776 INFO L175 Difference]: Start difference. First operand has 171 places, 313 transitions, 3954 flow. Second operand 8 states and 205 transitions. [2024-06-21 17:00:59,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 359 transitions, 4876 flow [2024-06-21 17:01:00,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 359 transitions, 4526 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 17:01:00,917 INFO L231 Difference]: Finished difference. Result has 173 places, 318 transitions, 3826 flow [2024-06-21 17:01:00,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3604, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3826, PETRI_PLACES=173, PETRI_TRANSITIONS=318} [2024-06-21 17:01:00,926 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 119 predicate places. [2024-06-21 17:01:00,927 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 318 transitions, 3826 flow [2024-06-21 17:01:00,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:01:00,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:00,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:00,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:01:00,927 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:00,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:00,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1079107904, now seen corresponding path program 2 times [2024-06-21 17:01:00,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:00,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240392898] [2024-06-21 17:01:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:00,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:01,788 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 17:01:01,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:01,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240392898] [2024-06-21 17:01:01,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240392898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:01,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:01,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:01,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168986470] [2024-06-21 17:01:01,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:01,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:01,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:01,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:01,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:01,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:01,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 318 transitions, 3826 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:01:01,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:01,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:01,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:04,995 INFO L124 PetriNetUnfolderBase]: 12093/17187 cut-off events. [2024-06-21 17:01:04,995 INFO L125 PetriNetUnfolderBase]: For 767008/767016 co-relation queries the response was YES. [2024-06-21 17:01:05,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125563 conditions, 17187 events. 12093/17187 cut-off events. For 767008/767016 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 100300 event pairs, 3640 based on Foata normal form. 8/17185 useless extension candidates. Maximal degree in co-relation 125489. Up to 14801 conditions per place. [2024-06-21 17:01:05,188 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 205 selfloop transitions, 167 changer transitions 0/379 dead transitions. [2024-06-21 17:01:05,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 379 transitions, 5292 flow [2024-06-21 17:01:05,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 17:01:05,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269607843137255 [2024-06-21 17:01:05,191 INFO L175 Difference]: Start difference. First operand has 173 places, 318 transitions, 3826 flow. Second operand 8 states and 215 transitions. [2024-06-21 17:01:05,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 379 transitions, 5292 flow [2024-06-21 17:01:06,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 379 transitions, 5052 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 17:01:06,175 INFO L231 Difference]: Finished difference. Result has 175 places, 332 transitions, 4237 flow [2024-06-21 17:01:06,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4237, PETRI_PLACES=175, PETRI_TRANSITIONS=332} [2024-06-21 17:01:06,176 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 121 predicate places. [2024-06-21 17:01:06,176 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 332 transitions, 4237 flow [2024-06-21 17:01:06,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:01:06,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:06,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:06,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:01:06,181 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:06,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:06,184 INFO L85 PathProgramCache]: Analyzing trace with hash -538785342, now seen corresponding path program 3 times [2024-06-21 17:01:06,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:06,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854417766] [2024-06-21 17:01:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:06,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:07,059 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 17:01:07,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:07,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854417766] [2024-06-21 17:01:07,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854417766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:07,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:07,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:07,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108261849] [2024-06-21 17:01:07,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:07,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:07,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:07,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:07,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:07,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:07,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 332 transitions, 4237 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:01:07,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:07,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:07,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:10,302 INFO L124 PetriNetUnfolderBase]: 12249/17444 cut-off events. [2024-06-21 17:01:10,303 INFO L125 PetriNetUnfolderBase]: For 833194/833202 co-relation queries the response was YES. [2024-06-21 17:01:10,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132385 conditions, 17444 events. 12249/17444 cut-off events. For 833194/833202 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 102423 event pairs, 3673 based on Foata normal form. 8/17442 useless extension candidates. Maximal degree in co-relation 132309. Up to 14917 conditions per place. [2024-06-21 17:01:10,514 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 211 selfloop transitions, 167 changer transitions 0/385 dead transitions. [2024-06-21 17:01:10,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 385 transitions, 5668 flow [2024-06-21 17:01:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 17:01:10,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171568627450981 [2024-06-21 17:01:10,516 INFO L175 Difference]: Start difference. First operand has 175 places, 332 transitions, 4237 flow. Second operand 8 states and 211 transitions. [2024-06-21 17:01:10,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 385 transitions, 5668 flow [2024-06-21 17:01:11,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 385 transitions, 5486 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-21 17:01:11,871 INFO L231 Difference]: Finished difference. Result has 180 places, 341 transitions, 4585 flow [2024-06-21 17:01:11,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4585, PETRI_PLACES=180, PETRI_TRANSITIONS=341} [2024-06-21 17:01:11,871 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 126 predicate places. [2024-06-21 17:01:11,872 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 341 transitions, 4585 flow [2024-06-21 17:01:11,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:01:11,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:11,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:11,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:01:11,872 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:11,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:11,873 INFO L85 PathProgramCache]: Analyzing trace with hash -538539078, now seen corresponding path program 1 times [2024-06-21 17:01:11,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:11,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070076860] [2024-06-21 17:01:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:11,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:12,906 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 17:01:12,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:12,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070076860] [2024-06-21 17:01:12,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070076860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:12,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:12,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:12,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816672480] [2024-06-21 17:01:12,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:12,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:12,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:13,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:13,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 341 transitions, 4585 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:01:13,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:13,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:13,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:16,244 INFO L124 PetriNetUnfolderBase]: 12276/17464 cut-off events. [2024-06-21 17:01:16,244 INFO L125 PetriNetUnfolderBase]: For 865462/865475 co-relation queries the response was YES. [2024-06-21 17:01:16,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134371 conditions, 17464 events. 12276/17464 cut-off events. For 865462/865475 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 102194 event pairs, 3800 based on Foata normal form. 14/17473 useless extension candidates. Maximal degree in co-relation 134293. Up to 16703 conditions per place. [2024-06-21 17:01:16,471 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 340 selfloop transitions, 41 changer transitions 0/388 dead transitions. [2024-06-21 17:01:16,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 388 transitions, 5635 flow [2024-06-21 17:01:16,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 17:01:16,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47549019607843135 [2024-06-21 17:01:16,473 INFO L175 Difference]: Start difference. First operand has 180 places, 341 transitions, 4585 flow. Second operand 8 states and 194 transitions. [2024-06-21 17:01:16,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 388 transitions, 5635 flow [2024-06-21 17:01:17,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 388 transitions, 5375 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:01:17,727 INFO L231 Difference]: Finished difference. Result has 185 places, 350 transitions, 4587 flow [2024-06-21 17:01:17,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4328, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4587, PETRI_PLACES=185, PETRI_TRANSITIONS=350} [2024-06-21 17:01:17,727 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 131 predicate places. [2024-06-21 17:01:17,727 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 350 transitions, 4587 flow [2024-06-21 17:01:17,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 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 17:01:17,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:17,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:17,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:01:17,728 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:17,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:17,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2060716040, now seen corresponding path program 1 times [2024-06-21 17:01:17,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:17,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702693011] [2024-06-21 17:01:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:17,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:18,483 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 17:01:18,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:18,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702693011] [2024-06-21 17:01:18,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702693011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:18,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:18,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:01:18,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725362649] [2024-06-21 17:01:18,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:18,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:01:18,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:18,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:01:18,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:01:18,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:01:18,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 350 transitions, 4587 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 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 17:01:18,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:18,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:01:18,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand